I had a set of michellin pilot powers that at 1800 miles I picked up a nail in the rear tire center tread. non of the local bike shops would patch it or plug it, so I decided to do it myself. I bought an umbrella patch, broke down the tire and patched it. I got another 400 miles on it. the last day I rode it home from work it picked up a slight vibration about 3 miles from my house. when I got home I checked the tires and I found two big bubbles in the rear. I broke down the tire and found no signs of damage inside the tire but I had two oval shaped bubbles in the tread. I knew I wasn't going to remount the tire so I got a knife and stabbed it in to the bubbles and they both had air trapped between the tread and the carcass, telling me that there was a potential blowout on the way. in my opinion, as much as it sucks, if you pick up a nail that punctures the tire replace the tire no matter how many miles they have on them.( the only exception is a plug just to get home or the bike shop.)
:Sport: