Welcome to the new and improved Proflex / K2 Tech Forum!
every so often with a compression the damn rear mech changes up or down a few gears - nightmare gear slipping. Guess it must be the full travel of the swingarm, coupled with a slighly worn chain, and the fact I need a bottom bracket with a shorter axel, (need 68*110, think I have closer to 68*115, maybe larger.