Originally Posted by
MikeyBoyAz
Interestingly enough and likely to not make any difference, but my MTB MAXXIS Ardent and Ikon tires started small and after about 72 hours stretched/relaxed to a larger size. Might you [OP] have measured your tyres after they stretched before, but now are measuring them before they could take shape completely?
Well, I just measured them again after 2-1/2 days and 70 miles. They are larger, a whole mm, now at 27.2mm. The center stripe is still narrower, but I feel better anyway. Maybe I'll have to mount and remount each new tire at home a few times to get the diameter stretched enough to facilitate fixing flats on the road. I really don't like using tire irons when I'm away from home.
Thanks, all.