I'm not sure how to answer this either...I spent zero on my waliworld/kmart/target Schwinn in two years of riding - I just rode 'er hard and put 'er up wet...no wonder the BB creaks and the chain groans. Two months ago I bought a Trek 7300 which hasn't yet needed anything other than the 100 mile routine service. LBS offers five years of unlimited "free" tune ups for $60, so it will be going back...