'08 Trek 520 with many thousand miles and a few worn out parts replaced. The bottom bracket is due again. Last I had track of it there were 6,000 + miles on it. If you ride a lot it seems like not very many miles. If you don't ride much it seems like a lot of miles. One of my riding buddies sells a frame at 7 to 8 thousand miles. But that only takes maybe three years. The 520 is 42 LB as it sits and my fast old school aluminum bike is 21 LBs. But I come back to the 520 and gave my aluminum fast bike to my adult grand daughter. Then this winter got a Trek Verve + 2 electric bike. It has a Bosch Mid drive and helps me do my in town chores. So I am using the 520, some, but mostly the Verve. I will honor the steel frame day with a ride. I may keep the studs on as well. And by the way, I wouldn't think of running a bike even around the block without a Brooks SADDLE. Be Well, Rustyzipper.
