Quote:
Originally Posted by CSBM5
Ah, that makes sense now. You really can't compare unmounted tires since due to substantial differences in sidewall design, trying to measure section width, unmounted and uninflated, is pointless. You will find wide variation in unmounted section widths depending on the specific tire type...many years ago I was comparing unmounted Hoosier A6 versus BFG R1, for example, and made conclusions based on that, but they were completely invalid once I compared them mounted on the same wheel width and inflated.
Regards,
Chuck
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But still....you wouldn't expect a 275 to be that much narrower than a 255. This is, in essense a 33mm "error".
FWIW, if I measure the unmounted treads, the 275 Michelin has a 267mm tread. The 265 Continental has a 270mm tread (although the tread is slightly more worn) and the 255 Yokohama (new) has a 274mm tread