I don't know, I just put a new chain and cassette on my 15 year old bike and it shifts like new. Silent too. You should be able to do that too, but I don't know SRAM. If you want a new bike though I'd say go for it. I thought about it myself this past year but decided at my age (65) it wouldn't be worth it. I certainly won't get another 15 years of use out of it. My current bike is carbon but it is getting to be old carbon. It hasn't exploded yet though. It looks a little beat up, but when you are moving nobody really notices.