The MRX is worthless the plastic breaks I fish these out of bicycle shops trash and use the rubber grips. The older models ESP are indestructible I put 60000 miles on 2 sets and only changed when I went from a 7 cog to an 8 cog rear setup. Try to find a front shifter with 7 or 8 clicks some times they are called friction they are less finicky that the ones with 3 clicks. I have never used the newer ones for 9 rear cogs I do know they use different rubber grips than the MRX these grips last one year and cost $10 to replace. If you do buy these remove the handlebar fixing bolt and put antiseize on them they are prone to corrosion. If you have problems removing these bolts from older frozen ones it is possible to use the slightly larger english size hex wrench in stripped bolts.