Originally Posted by powers1

Sorry,I am bit late to this ,but just noticed it!Plus its also an ongoing thread!
If you say that Michelin claim that 255 is ok on a 7.5" rim,then they must have said it!I am sure BMW disagree ,otherwise they wouldnt fit a 255 on 8.5" and 9" rims ?
A 235 on a 7.5"(190.5) rim already sticks 2.2 cms on either side of the rim,a 255 on the same rim will increase that to 3.75 cms,creating even mode body roll.Ok for off road ,basically.I wouldnt want to drive it on the road going round curves with it,as it would also put too much strain on the tyre wall...eventually cutting it!