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My initial thought was that some kids must have messed with it as I had both a new tyre and inner tube fitted last November, and I’ve only done about 400 miles since then. The tyre should have had 50psi in it, but on checking there was only 20. There was no sign of a nail or any puncture marks. Rather than use a foot pump I opted to use a small 12v car compressor. Although supposedly it can pressure up to 80psi (so it says in the instructions) it was not man enough for this job, and started to smoke when it got it up to 35 psi !!! This was enough though for me to make a run to the local garage only 0.5 a mile away and fill it up properly. The following morning the tyre was down to 15 psi so something was definitely amiss and the wheel had to come off. My wheel brace is missing the (breaker) bar that should be with it (getting one made up at the moment) so a friend who also has a GMC CCKW kindly swung by and we used his to get the wheel off. Fortunately I have a 4 ton bottle jack which was able to handle lifting the front axle to get the wheel up off the ground without any problem, with a few bits of wood used to spread the load on the drive.-
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The weight of the tyre and wheel is huge and it took two of us to load it into the car to take it to a garage in Somersham who can deal with split rims. On getting the tube out they found the puncture in the side of the tube. It wasn't clear how it had happened and it could be either:
a) a manufacturing defect with the tube, or
b) a small piece of rust off the rim
Anyway, we are now back on the road and looking forward to taking it along (weather permitting) to the Ramsey 1940 weekend on 18th & 19th Aug. Link
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