ya... my hubby actually borrowed a tire from someone on a ride he was on when he blew a tire! go figure! i know i don't carry one! (well.. i take my spare blue one to rides with me.. but it's in the car.. not on me or the bike.... so i don't really know why we bring it!

hmmmmm... didn't think about the spare wheel... i actually already have a spare 700 for just that reason.. got it cheap from the LBS so i don't ruin my pro michelins.. put the other tire on for nasty, horrible, evil trainer riding (get the idea i don't like the trainer!)