So got a SRAM something or other (9 spd) on the Alpine 160. Seems to rust at an alarming rate between rides....look after the bike fairly well - wash down with hose (not pressure one) after each ride....GT85'd and then lubed up with some Finishline wet lube. Doesn't seem to make a blind bit of difference as two days letter I come back to an orange chain with stick links! Have also tried the don't wash it and chuck it in the shed approach, which didn't fair any better! Have also left it in the back of the campervan for a week after riding (still with mud on) and it comes out the same just as quickly!
Have heard a few people say KMC's last okay?