Originally Posted by
ramzilla
Going from 7 to 8 speed opens a whole can of worms. Unfortunately everything has to match & fit for it to work. You will need special measuring equipment & tools. It's probably not worth the effort.
Agreed. Add in the increased propensity for broken axles, and it's hard to make the case for it.
You're much better off just buying another bike.
Or just staying with 7-speed. How much "benefit" would that additional sprocket get you, and are there other ways to accomplish that goal?