Hey, would a 275 tire perform any differntly on a 9.5" wheel versus a 10" wheel?

 

it should stretch the tread slightly having you roll slightly more on the edge area but with .5" difference I doubt itd be noticable.

 

what do you mean by roll...not body roll.

Would this cause the tire to break away more easily?

 

I believe what he is trying to say is that as the rim gets more narrow, the tread is more likely to have less contact at the edges. I seem to be having a problem with negative camber on my 275/40s in the rear that is causing most of the tread wear to happen on the inner part of the tread. I had is in at the dealership just before I installed the new wheels and tires and it looks like I will have to go back.

 

Agreed. But, it also depends on what rims widths the tire was designed for. A 275 wide tire from company A could be optimally designed for a 9.5" wide rim, while the same width tire from company B could be optimally designed for a 9" or 10" wide rim.

As a general rule, I look at the tire manufacturer's recommended rim widths and *always* stay within those specs. Ideally, you'd probably follow the "measuring" rim width, as I'd assume that to be the most ideal. (That being the width they used during measuring to obtain all the numbers and stats on their info sheets.)

From most of the tire manufacturers I've seen so far, for 245/40/18 tires they use a measuring rim width of 8.5", and for 275/40/18 tires they use a measuring rim width of 9.5".