Originally Posted by beaglepgh

I have always wondered why more people don't think like you. I never understand the bike-shop argument to replace a $40 chain (plus labor) more frequently, in order to avoid possible harm to a $40 cassette (easy replacement, no labor cost). If the math does not support frequent maintenance to avoid repair costs and you don't have some other compelling reason to do it why bother? Logic dictates that this argument should win but somehow I feel like a bad person if I fail to maintain my stuff.