Hey, I've been running 2.5 minions for about a season now, and they seemed to have gotten really chewed up pretty quickly. As its my first season riding, how long do you guys ride on the same tires, how chewed up do you let them get? It just seemed weird to me, before this i've never really noticed much wear ever from the cheapo tires that came w/ my trek 4300. So far I haven't noticed a difference in their performance, but I do not want to be caught off guard when they slip unexpectedly. Advice on the matter would be appreciated.