I've had my Trek1000 for about a year and half and ridden it close to 4000 miles. I have not had a flat tire and have been wondering how long I could go. I don't really have a good feel for how long tires should last either. My tires are worn quite smooth, but they were working fine.

So last night I pumped them up to about 120 psi and went to bed all set for my commute this morning. I got all dressed, said goodbye to my family and started to walk the bike out of the den where I keep it and heard a small explosion. My rear tire blew right there in the room. The tire itself failed right in the center where it was really thin. I was bummed not to be able to ride this morning, but, hey, can you think of a better place and time for that to happen?