The chain on the bike now is stretchin and kinking up. I need to replace the chain but not sure what size to get. I knows its a 525 but how many links. The sprocket sizes are 15/45. Can someone tell me what size chain I should use? Thanks!

 

chains are supposed to stretch, but is the kink at the masterlink cause a lot of times those go bad first and replacing that fixes it. stock is 108 link, but if you're replacing the chain you should get new sprockets too. I'd suggest 530 16/48 112 link o-ring w/ a rivet master but you're always better off buying a 120 and cutting it to fit. +5 is only slightly lower gearing than what you have now. -1+2 is about = to +4.66