I just got a new MT-21 and had a couple questions. What kind of pressure are you running off road? Also, do you think their is a need for a rimlock in front? That is have you had the need to air them down so much you needed rimlocks?

Everyone has an opinion on this one...and I'm no exception.  I've long since decided that the downsides of low tire pressure are not worth the performance gain.  I may go down as far as 20 lbs if I know I'm gonna be strictly off road.  Otherwise, I stay around 26-29 lbs.  Unless you're riding less than 16 lbs, I don't think you'll need a rim lock.  Just my $.02.