Vehicle Dependent Expedition Travel

Sterlin is our 2002 Land Rover Discovery II and our first choice as expedition vehicle.

The dream started in 1992 in a desert town in Morocco where 2 fully expedition worthy Discoverys were our neighbors for a night in the campground.  These were the years where Land Rover Discoverys dominated the Camel Trophy Expeditions.

We believe that the Land Rover Discovery is an excellent choice as an overland expedition vehicle.  It has great ride comfort, is more than capable off-road and can take us on any road we would want to go, has passable fuel economy and range and there is adequate international support for servicing and repairs by trained mechanics. In an ideal world we would elect for a diesel engine without an ECU which is simpler, more reliable and typically offers better range, but alas we could only get the petrol/gas version in North America.

Although we have had Sterlin for over 10 years and have added 90,000 miles to the clock, it has been maintained well and is in very good mechanical shape. In addition to regular maintenance, Sterlin has undergone a comprehensive mechanical review with pro-active repairs including new shock absorbers, head gasket, transfer case seals, radiator, thermostat, radiator hoses and partial ABS replacement. And we figure, what could possibly go wrong traveling around the world in an aging high mileage Land Rover?

In preparation for overland expedition travel, we have made some minor modifications to Sterlin and added the necessary travel and camping equipment.  The modifications and add-ons have been a labor of love involving many hours on the internet researching options and just as many hours implementing the changes in our alley in front of our apartment.  


This blog provides more details than you could possibly want to know on what we have done to prepare Sterlin for our expedition and records the issues and resolutions during our journey.


Car Preparations and Enhancements

Here you can find out about all the modifications and add-ons we made to our beloved Sterlin. These made the car more ready for the journey and the journey more enjoyable for us.  

Modifications include:


Add-ons include:


Mike Murphy: car mechanic in Vientiane, Laos.


Meet Mike Murphy, who did everything in his power to help us trying to fix a potentially trip-ending issue with Sterlin. Not only did he spend a day on the phone trying to help us remotely and talking us through different scenarios and possible solutions; the next day he drove Caroline from and to the airport and spent some hours trying to sort out parts for Sterlin. You see, we are not the first 'overlanders in a jam' he met and helped.

If ever you are in Laos and need work done on your car, he's the guy to call for help and/or advice. Here are his details (not only with permission: Mike was very happy for us to share them and so were we!!!)

Mike Murphy. 
LAO CAN-AM Int'l Auto Services Co., Ltd.
Ban Phonesinuan, Sisattanak District. P.O. Box 8587. Vientiane, 01000 Lao PDR.
mobile: 856-20-5550-3491-2
laocanam@laopdr.com
laocanam@gmail.com

Sterlin's Service History

Before the trip started Sterlin was checked over by Philippe our local Land Rover mechanic. Philippe had competed all of our major repairs and we certainly trust him with Sterlin. Before we set off, he wanted to have one final look over Sterlin. Nothing was found.


Land Rover has a pretty good service network throughout the world, and the plan was to tap into this network while we travelled. It is always a good idea to keep a close eye and ear on unusual sights and sounds. But any work would be done by mechanics, ideally Land Rover trained mechanics. This blog post lists the work we had done during our trip.




Thursday, October 10, 2013. 169,534 kms
Fremantle, Western Australia

This was our first planned service. We also had a small transfer case leak which had developed a week before this service. As part of the service Sterlin got new engine oil, oil filter, air filter and a little surprisingly two new brass plugs for the front and rear diffs. There were no issues found and the fluids were not even topped up. In fact the owner of the indy shop declared that our car is in "immaculate" condition. High praise indeed.

The transfer case leak was determined to be too minor to worry about. So no repair was completed and I continued to worry.


Wednesday, January 15, 2014. 169,534 kms
Chang Mai, Thailand

This was our first unplanned service. The right rear brake had developed a squeal during light braking. Probably not a safety issue but very annoying and best to have it checked out. The brake pads had some wear but were not ready for replacement. Both rear rotors had some grooves and these were quickly removed with some grinding. In America we would have got replacement rotors, but this is Thailand after all.

The mechanic also checked the transfer case for signs of leakage and the oil level. No problems found. The transfer case leak seems to have fixed itself.


Wednesday, March 28, 2014. 185,387 kms
Vientaine, Laos

This was our second planned service. A little late maybe, but we wanted to do the service immediatley prior to travelling through China where it is probably harder to do. There are no authorized service centers and we are on a bit of a schedule making it hard to stop to fix things. We also had a very good feeling about the expertise of the Land Rover garage here in Laos and did not get the same warm fuzzy feeling while in Cambodia.

The service consisted of an inspection of the fluid levels and brakes as well as new consumables like engine oil, oil filter and a much needed air filter (the roads have been very dusty lately). In addition to the regular service items, the following was completed.

  • Rear Vision Mirror was loose and needed to be more securely attached (somehow).
  • Rear brake pads were starting to get low and decided to replace them a little early. They probably had another 3,000 kms left on them. The garage performed a safety check on the brakes using their equipment. 
  • Check for coolant leaks. None found.
  • And my favourite, check for oil leaks and oil level of the transfer case. No signs of oil leaks and the oil level was just fine.
We supplied spare oil filter, air filter and rear pads that we purchased the previous month in Belgium and the garage used these. Turns out however, the garage probably had the parts (or could get them quickly from Thailand). We also found out that there is indeed a service center in Ulaanbaatar, Mongolia owned by the same group. Good to know.


Wednesday, April 16, 2014. 186,775 kms
Luang Prabang, Laos

This was our second unplanned service. A few days earlier Sterlin had developed a terrible vibration at low speed. The vibration was so bad, Sterlin was not drivable. A very close inspection of the Universal Joints on the front prop shaft revealed a potential issue. It was really hard to see, but something didn't quite look right. And if it was the Universal Joints, then all the advice is not to drive the car until this is repaired. Stephen tried to remove the prop shaft to have a closer look, but that proved to be difficult as the bolts would not budge. Finally Sterlin was towed to a local mechanic where the prop shaft was removed and the Universal Joints were inspected, greased and the prop shaft returned to service. The whole process including the tow took less than 2 hours. And although Sterlin seemed to be running fine after this work, the concern was that there was still some issue that the new grease was hiding.

New Universal Joints were on order from Australia and at least we would have these should the problem return.



Monday, May 5, 2014. 190,850 kms
Xī'ān, China

This was our third unplanned service. The replacement Universal Joints had finally arrived after a small journey around South east Asia and China. Stephen consulted with other members of the China convoy on the pros and cons of either a) fitting the replacement parts or b) waiting to see if the old part would fail, and if they did, make the repair then. In the end the pros of option a) won the day, so Stephen headed straight to the Land Rover garage to get the replacement parts fitted.

After 5 hours the mechanics still had not managed to install the new parts so Sterlin stayed overnight in the garage. The following morning he was all fixed up and back in good form. After a good look at the Universal Joints removed from Sterlin, it was easy to see significant wear on one of the four bearing ports. The decision to make the repair early was clearly the right one.

The decision to replace the parts pro-actively was made for the following reasons:-

  • A field repair would certainly be more difficult to complete than a repair carried out in a garage by mechanics.
  • Although we believed we had ordered the right replacements parts (based on Land Rover part numbers), it is only certain that they are right ones once they have been fitted. It would be quite possible and very terrible to carry spare parts thinking that they are the right ones only to find out later that they were not quite right once things go to custard.
  • A window existed where we could get the repair completed without impacting our travel schedule. If we needed to make the repair after a failure, it might happen at an inconvenient time and place that might also impact our travel schedule.



Monday, May 19, 2014. 193,318 kms
Ulaanbaatar, Mongolia

This was our forth unplanned service. While driving through China the onboard diagnostics told us that we had a potential misfire issue on clyinder 7. Well that was 1,600 kms ago and the issue has not been reported by the car's electronics since. We suspecte the issue was with the spark plugs and maybe exotic South East Asian fuel. The hope was the Land Rover service center would be able to probe deeper into the car's electronics to find out what was really happening. And while Sterlin was in the garage, we thought it best to have a full inspection as well given we are about to go into the Mongolian back country.

There was some buildup on the spark plugs, but nothing too bad. Not good either. The decision was made to fit new plugs. The inspection revealed two other issues. The passengers side exhaust manifold connection to the rest of the exhaust system had a faulty nut. Very similar to the problem on the drivers side. Just a few minutes to find a replacement nut and fit it. The second issue could have been very serious had it not been spotted and corrected. The engine drain plug had oil leaking from it. Turned out the plug was loose. If it had come undone while driving, all of the engine oil would have drained in seconds and Sterlin would be in serious trouble. This was fixed in less than a minute.

Overall very happy that we had this unplanned service.



Friday, June 20, 2014. 198,549 kms
Almaty, Kazakhstan

This was our third planned service. We had read good things on the Internet about the Land Rover garages in Kazakhstan, and we weren't disappointed. The Land Rover garage can also be found on Google maps as Caspian Motors.  The location is Suyunbay Ave 15, Almaty (or  N43.273263° and E76.950101°).

The service was typical, new oil and oil filter and replace the air filter. They also did a check of the suspension, brakes, lights and other fluid levels. We supplied the oil filter and air filter and the garage supplied the oil. Again, they did not have the parts. No issues found.


Wednesday, September 24, 2014. 209,558 kms
Gent, Belgium

This was our forth and final planned service. We had the service completed at the Land rover garage located in Gent. The service and repairs only took 2 hours!

The service was typical, new oil and oil filter and replace the air filter. They also did a quick safety check of the suspension, brakes, lights and other fluid levels. There was one little issue with a coolant leak from the throttle body de-icing unit that was remedied by disconnecting the coolant hoses and by-passing the leaking gasket. A small oil has also developed, but being a Land Rover that is to be expected. And the best news, no issues found.


Next planned service at 222,000kms or 138,000 miles.


Problems with Sterlin

This is a blog post about the things that have not quite gone right with our Sterlin. We have completed 55,000 kms (35,000 miles) over some pretty unforgiving terrain. We have had only one major failure but did have lots of little minor issues. Here are all the messy details below.


Dead Engine Battery
September 11. Adelaide, South Australia

Sterlin broke down in one of the busiest streets of Adelaide. We had just driven from Mt Gambier and parked in the center of town to pick up an ATM car from our bank. When it was time to go, Sterlin would not start. Clearly an electrical problem. Lifted the bonnet and my multimeter quickly told me that the issue was with the engine battery. To get us going again, I swapped the engine battery with the auxiliary battery, which took about 5 minutes.

Being in a major city, it did not take long to find a replacement battery. In fact we had a new battery in less than 2 hours which was later fitted in the basement of the Hilton Hotel.

The original battery was less than a year old, and really it should not have failed. Maybe the three month journey from Los Angeles did not help.


Fridge/Freezer Draining Auxiliary Battery
September 25th. El Questro, Northern Territory, Australia

Our ARB fridge/freezer was not holding the 4 degree C target temperature. The problem seemed to be with the auxiliary battery, which was getting depleted during the night. Maybe there was a problem with the split charger and the charging of the auxiliary battery.

After watching the fridge and auxiliary battery for several weeks, I could find nothing actually wrong. And now that we are in a cooler climate, it seems that the system is working well again. So, I am going to assume that the very high temperatures in the north of Australia were just too much for the overall system and everything will be fine in cooler climates. It has now been two months and all is well.


Transfer Case Oil Leak
October 6th, 2013. Gnaraloo, Western Australia

A small oil leak from the transfer case appeared. Very hard to actually determine where the leak comes from, probably one of the seals. The transfer case had a leak a few years ago, and the seals were replaced at that time, so this was a little unexpected. It is however a very minor leak.

Thursday, October 10, 2013 Update: While in Perth we had a mechanic take a better look at the leak. The verdict was that it was too small to worry about. And as a general rule, Land Rover's leak oil. So, just going to have to watch this one.

Wednesday, January 15, 2013 Update: While we were having the rear brakes fixed, we got the mechanic to check the transfer case levels. All fine.

Friday, March 28, 2014 Update: While in Laos we had a Land Rover mechanic check the fluid levels in the transfer case again. With another 15,000 kms since the problem was first noticed, the area is clear of oil with no signs of a leak and the oil level is just fine. Never heard of a leak fixing itself, but not complaining. The leading theory now is that the breather at the top of the transfer case got blocked by all of the Australian dust and this caused a build-up of pressure in the transfer case. Just a theory.


Bad Smell from the front air vents and leaves in the blower.
November 19th, 2013. Seremban, Malaysia

Every time we started the ventilation fan, we got a nasty smell from the right side front vent. A quick inspection revealed some nasty stuff growing in there. And some on the left side as well. Caroline and I spent an hour pulling the vents apart and giving them a good old clean. At the same time we cleaned out the ventilation blower to remove some leaves that had managed to get in there and were making all sorts of noise.



Something nasty in the vents.

Leaves in the blower.

Rear Passenger Side Running Light Blown.
November 19th, 2013. Seremban, Malaysia

Ok, not a big deal. Changed the blown bulb from the stock of spare parts. And I guess this why we carry spare parts.


Squeaky Brakes
January 15th, 2014. Chiang Mai, Thailand

After a week of enduring a squeaky right rear brake over the hills of Northern Thailand, we took Sterlin into a garage to have this checked out. The brakes are fine, but the rotor was a little worst for wear. So after a little grinding, all was good again. The garage also took a look at the transfer case oil leak, and not problems there. So knock on wood, Sterlin is doing ok.


More Battery Related Issues
January 22nd, 2014. Chiang Mai, Thailand

Sterlin failed to start just after we finished filling up with gas in the morning. Everything went dead, all the lights on the dashboard went out along with other car electrics like the clock/radio. After waiting a few minutes, everything reset and Sterlin started fine. Well, this is a bit concerning.

January 27, 2014 Update: We were 20 kms outside Nong Khai at a Buddist Temple when Sterlin failed to start again, and just like before did self-reset and returned to normal. But this time after two re-start attempts. Once Sterlin was running, we did not stop until we made it to Nong Khai where we had already planned to stop for the night. Based on more internet research, the leading theory now is battery leads. So, I disconnected the two leads and re-connecte them, this time nice and tight. The orginal Land Rover battery leads are not very good, even our mechanic Philippe had trouble. So here's hoping that this is the problem.

March 28, 2014 Update. It has been 2 months and no further problems. I am chalking this up to a loose battery terminal lead.


Secondary Air Injection Pump maybe blocked
February 4th, 2014, Nang Rong, Thailand

For a few days we have noticed a strange noise coming from the glove box just after we start the engine and which disappears after a minute or so. After popping the hood, the sound was clearly coming from the large black thing with pipes coming out of it. So I just needed to find out what the large black thing with pipes coming out of it was. Consulting my handy dandy workshop manual soon revealed that it was the Secondary Air Injection Pump, and it is probably blocked. Fortunately the Secondary Air Injection system serves no useful purpose other than to help the catalyic converter to lower emissions during the first 60-90 seconds after a cold engine start. Hardly useful here in South East Asia where fuel emissions are part of the fabric of life. So, will need to take a quick look at the pump filter when I get a moment. Land Rovers do like attention.


Fridge/Freezer Stopped Working
April 1st, 2014, Banteay Chhmar, Cambodia

Problems with the fridge/freezer again. Opened the back door of Sterlin after hiking around the ruins to find our fridge/freezer not running. The multimeter is handy and it took less than 2 minutes to isolate the electrical fault to the fuse in the power supply cable. Earlier in the day I managed to jam the power supply cable for the fridge in the mechanical slide and must have damaged the cable. The cable did not look damaged but the fuse did its thing so there is probably some internal short in the cable. The unfortunate thing is that ARB uses some weird fuse in their 12v adaptor, and I did not have a spare. But I did have a spare 12v socket adaptor, so later that night I replaced the ARB supplied adaptor with a Blue Sea adaptor and was up and running again albeit with a slightly shorter fridge cable now.


Rear Door Would Not Open
March 7, 2014. Phnom Penh, Cambodia

Arrived at the hotel after a long a dusty drive from Kompong Thom. But unable to open the rear door, which is a major problem. The shelving system is designed to keep the luggage safe and secure unless the rear door is open. It is not even possible to acces the luggage from inside the vechicle. So a little panic set in.

After calming down I got out the WD40 and started spraying madly. We had spent the last 180kms and 6 hours on dusty dirt roads and I was convinced the dust had caused the door mechanism to fail. The WD40 did not help, so I started the process of dismantling the shelving system. Not that this would actually help, as the shelving system is design is such a way that it can't be dismantled from the inside. But had to try something. And it was getting late and dark and we needed our luggage for the night. Worst case I could saw through the shelving system. About 20 mins into the dismantling process I tried the rear door again, and unbelievable it just opened. I guess it took the WD40 a little time to work its magic.

With the luggage out I was a little afraid to close and lock the rear door. Took the rear access panel off and gave the whole area a good old spray. It was extremely dusty.

Sunday, April 13th, 2014 Update: Although we have not had any more problems with the rear door, we now WD40 the lock and have installed some foam to prevent further problems. The foam is at a proof-of-concept stage, if it helps will replace with a more permanent solution.

New black rubber strips and
proof-of-concept anti-dust foam.

Throaty Exhaust Sound
April 13, 2014. Luang Prabang, Laos

In the last week we have noticed a throaty sound coming from the drivers side engine bay when the engine is under load (that is, going up the steep northern Laos hills). The noise is not noticeable when Sterlin is at idle. A quick look under the car revealed that one of the stud/nuts joining the exhaust manifold to the catalytic converter and the rest of the exhaust system was missing. The experts on the land rover forum suggest that most likely the stud has sheared off, so this is not a straight forward job to repair. And I could to more damage than harm trying to fix it. So, for the moment we are going to live with the noise.

The missing stud/nut. I think that this
is the problem.

Wednesday, April 30th, 2014 Update: I finally crawled under the car to see if the stud was missing or snapped off. Good news it was just missing and quickly replaced it with a bolt from the spare parts collection. I also found the two remaining nuts were loose, which would clearly cause the throaty sound and even venting hot exhaust into the engine bay, which is not a good idea at all. After tightening the nuts, the noise went away. Surprise surprise. I will add a bolt to the vacant hole another day.

Friday, May 9th, 2014 Update. Stephen finally broke out the bag of spare nuts and bolts and found one that would fit where the stud was missing.

Monday, May 19th, 2014 Update. During the service inspection in Ulaanbaatar, the mechanic found a damaged nut in the same place again on the exhaust manifold connection, but this time on the passengers side. He quickly found a replacement nut and had it installed.


Front Prop Shaft Vibration.
Sunday, April 13th, 2014.Luang Prabang, Laos

A noticeable vibration through the chassis and steering wheel indicated we had an issue on our hands. The next few days were spent working out what was wrong and trying to get it fixed. Turned out to be the Universal Joints forming the Hookes or Double Cardan joint on the rear of the front propellor shaft. The timing of this failure was incredibly bad as we were due to cross into China in just 4 days. The timing was further compounded by the fact that Laos and most of South East Asia were on holiday from April 14th through 16th. The blow by blow description of events can be found in the Luang Prabang blog post.

The failure was ultimately repaired by creasing the joints. A simple repair that we hope will hold until replacement parts can arrive.

Monday, May 5th, 2014 Update: The parts from Australia turned up this morning. They went on a bit of a tour of South East Asia and China to get here, but it was good to finally have them. The temporary repair has lasted 3,500 kms and seems to be holding. After consulting with others on the convoy, we all felt it was a good idea to replace the suspect UJs with the new parts, so I went directly to a Land Rover mechanic to get them replaced. After five hours working on the car, they still had not got the replacement parts fitted. They finished the job the following day.
When in Ulaanbaatar, got the mechanic there to check and grease the joints. Everything seems fine.

The broken bit. The Hookes Joint.


Rear Passenger Side Brake Light Blown and Rear Driver Side Running Light Blown.
April 23rd, 2014. Tiger Leaping Gorge, China

Ok, not a big deal. Changed the blown bulbs from the stock of spare parts. 


P0307 Error Code from Onboard Diagnostics
May 10th, 2014. On the way to Hunyuan, China

The onboard diagnostic tool we had reported a P0307 error, which is a mis-fire on cylinder 7. I had no idea that Sterlin had a misfire detection system.

While in Ulaanbaatar we had a local garage inspect and then replace the spark plugs. The old plugs looked in good enough shape, but better to replace them. The error code was thrown 1,600 kms ago and never returned, so maybe also ust a glitch. Then on June 19th on the way to Almaty the on broad diagnostics tool reported a misfire on cylinder 1 this time. Now we are thinking it might be mixed octane fuel. Will see if the issue continues.


The old spark plugs


Drivers Side Electric Seat Blown.
June 22nd, 2014. Bishkek, Kyrgyzstan



Tried to make the seat lean back when there was something behind it and popped the fuse. Unfortunately the fuse is 40amps, and we do not have a spare. Did blow a 30amps trying to see if that would work, it obviously didn't. Not sure if any damage was caused or if I just need a correctly rated fuse. Looking for a 40 amp fuse now to check.

Thursday, January 22nd, 2014 Update. Finally was able to purchase a 40amp fuse. Popped it in and the seat worked fine.


Leaking Coolant.
August 13th, 2014. Hamburg, Germany


The pre-start morning inspection revealed a noticeable drop in the coolant levels. It did not take long to fine the source of the leak as there was coolant dripping off the manifold cover. The leak was coming front the de-icing unit gasket located under the throttle body. The coolant level was topped up and this repair with have to wait.

Wednesday, September 24th, 2014 Update. Land Rover garage in Gent disconnected the coolant hoses from the leaky deicer and by-passed the unit. Problem solved for now.


A New Oil Leak.
September 24th, 2014. Eeklo, Belgium


The day before taking Sterlin in for a routine service, we noticed a new yet small oil leak on the passengers side of the gearbox. The following day the Land Rover mechanic dismissed the leak as too minor to worry about. I guess we will just keep an eye on this for a while..


Post Trip Review.
February 10th, 2015. San Francisco, USA


Finally crawled under Sterlin to complete a post-trip inspection. The gearbox oil leak detected in Belgium is still present, but it is minor and has not got any worse. Unfortunately the Transfer Case oil leak has returned and seems to be more problematic. Although it is not dripping to the ground. There is also a new leak from the brake fluid reservoir, but is very minor. All these three leaks sound like typical leaky land rover issues and nothing to worry about.

Otherwise Sterlin seems to be in fine mechanical shape. The rear two tires were very beaten up and they were replaced with the front tires which were in fine shape. The front tires were replaced with new tires. The rear tires probably had 45,000 miles on them anyway. During the trip we only had two issues with punctured tires and both were fixed with a plug kit.

All in all, Sterlin performed magnificantly. We are so proud of him.






Mapping Technology

This post provides a brief overview of the mapping technology in use on the trip.

We have two Garmin GPS units. For the car we have a 5 inch Garmin nüvi 52LM that is useful for driving directions. For walking around we have the Garmin Oregon 450 handheld. We started off the trip with just the handheld expecting it to be able to be used for driving directions.  We were completely wrong, the handheld is useless for driving directions.  So while in Malaysia we purchased the nüvi.

The most important thing about these GPS devices is the maps that are loaded onto the devices.  Or put another way, we have found for the driving directions to be useful, it is essential to have good quality map data. And on the 52LM it is possible to side-load one custom map onto an SD card.

Our mapping software is Basecamp also by Garmin and runs on a Mac. Of course Google Earth is also used, but it really needs a network connection to be most useful.  In Basecamp it is possible to download free maps from the internet and use them with Basecamp and view them off-line which helps with planning. However, some computer gymnastics is required to get these free maps onto Basecamp.  White Acron provides a pretty good summary.

It is pretty easy to get maps onto the Garmin. The major steps are:-


1. Download your desired map data from garmin.openstreetmap.nl.  For the Garmin, the version to download is osm_generic_gmapsupp.zip or the file with the description "Compressed file that contains a single image that can be placed directly onto the SD-card of the GPS."

2. After decompressing the zip file, load the mapsupp.img file into the "Map" directory of our Garmin micro-SD card. To keep things straight, we rename the file to something more understandable.

To get the map onto Basecamp, a slightly different and more comlicated process is used. The major steps are:-

1. Download your desired map data from garmin.openstreetmap.nl.  In this case, and as we are using a Mac, the version to download is osm_generic_macosx.zip or the file with the description "Map installer for BaseCamp/RoadTrip on the Mac OSX platform".

2. Load the map into Basecamp using Garmin Map Manager.  If you do not have the Garmin Map Manager application, then download it for free from the Mac App Store.

3. You will probably want to change the name of the map and the Family ID to something useful and to avoid conflicts with other maps you download which will have the same name and ID.  The map name can be changed with JaVaWa GMTK which is available for free at www.javawa.nl/gmtk_en.html.  The map name and Family ID can be changed from the "Extra" menu icon and the "Change map name and ID" menu option.

The free map is now available in Basecamp.  The Open Street Map project provides routable maps which can be used for route planning and of course can be downloaded to our GPS for both driving and walking.  There are other sources of maps on the internet.

4. This map can be transferred to our Garmin device using Garmin Map Install. But it usually takes a while, so the first procedure is easier to follow. In addition, the Address Search will not work correctly.

We also have MotionX on our iPhones and iPads.  Great app, but does require a network connection to load maps and unload tracks.

New Tires

Sterlin is fitted with Grabber AT2 tires from General Tire.  Basically a stock tire that is a little wider than normal and with a more aggressive grip for both on and off road driving.
The Vehicle Dependent Expedition Guide (VDEG) by Tom Sheppard recommends the following:-

  • Tubed Tires. Our tires are in fact tubeless. Apparently tubeless tires save weight, cost and puncture less dramatically. But they require specialist equipment to fit and large amounts of high pressure air to fill.
  • One spare. To quote our venerable VDEG, "A single spare wheel and tyre is perfectly adequate for expeditions in even the most distant region; quite simply, the weight, bulk of one spare wheel is quite enough of a handicap when you are pushed for payload".
  • Radial Ply Tires.  Our tires are radial ply.  See below for more details of the tire constructions.  Radial Ply offer lower rolling resistance gaining detectably better fuel consumption as well as permitting lower inflation pressures without overheating.

The choice of tire is quite important as they are bound to fail at some point on the journey. We will be on tarmac, tracks, mud and desert so a good all-round tire is preferred. Ideally we would have a tire like the Michelin XZL, but the Grabber AT2 is an ok alternative.


In terms of wheels or rims, we have the tires fitted onto factory alloy rims.  All wheels are configured the same in terms of both tires and rims. The rims are secured to the car with McGard wheel locks. Some specs for our tire choice.

  • Brand: General Tire
  • Model: Grabber AT2
  • Size: 255/65R-16
  • Type: Mud and Snow
  • Load/Speed Index: 109T (1,030kgs/2,300lbs, 190kph/118mph)
  • Load Range: Standard Load
  • Sidewall: Outline White Lettering
  • Overall Tire/Wheel Diameter: 29.1 ins.
  • Tire Weight: 37.0 lbs
  • Max Inflation Pressure: 44 psi
  • Overall Section Width (measuring rim): 10.2 (7.5) ins.
  • Approved Rim Widths: 7.0 - 9.0 ins.
  • Max Load: 2271 lbs
  • Tread Depth (32nds): 16
  • Revs per Mile: 714
  • RIM Protect: yes


Grabber at2 en
Info-graphic of the tires we are using.