[CMOTD]

It can happen with any make from most eras. I have no idea why but it is fairly random. I recently resurrected three Airfix/MRRC F1 cars from the 1980s: the tyres on one were perfect, another had some that had nearly disintegrated with the weeping oil syndrome and the third had rock hard ones which proved impossible to soften. They were all bought from new at the same time and stored under the same conditions for the past forty years.