Apologies in advance, as this has sweet FA to do with thumpers, or even bikes

Me and the Mrs share a Citroen Berlingo. Over time it has become obvious that it ets the rear nearside tyre, more than the rest. The rear axle is fixed, as in there's no alignment or tracking adjustment, and I've now been told, a couple of times, that they all do that, and so do Renaults. I just wondered, could it be that these vehicles are designed to drive on the right hand side of the road, and so driving on the left, the camber going the other way, affects them. Just a thought?