quote:In the rear with an 8" Campy, 275-55 is a maximum theoretical tire width to be adequately supported by that width wheel. But if you never do open track, don't drive aggressively in the hills and keep the tire inflation above 35 psi, the 295 will work to keep the rear wheels off the pavement. Handling will not be the best, but it will look fine. A 295 tire really needs a 10" wide wheel to work properly.
Uh, not according to the technical specification from Toyo for the 295/50-15 Proxes ST. As a matter of fact, 8's and 10's are the minimum and maximum rim width size limits on the same spectrum. And they must pass the same handling and safety requirements on all sizes within their spec to earn the various ratings for that tire - speed, traction, treadwear, etc.
The acceptable rim width for any given size of tire is something the manufacturer specifies. IIRC, 305/50-15 BFG Euro TA's spec'd an 8" to 11" rim as acceptable. The acceptable wheel size is not universal for any given tire size across manufacturers or even tire models.