Originally Posted by
wgscott
I took my tire off, and it is clear that the rubber in the center is much thinner than it is say 1cm out from the centerline, so it has kind of an M profile now.
I probably am running the tire pressure a bit too low in the rear.
From the Internet Expert Chair:
Sounds like your rear tire may be worn out. Move the front tire to the back and put a new one on the front. (That'll prevent problems like the one I had last month when my front sidewall, with some 8,000 miles on it, blew out two miles from home. Do as I say, not as I do!)