Quote Originally Posted by Catrin View Post
I actually called SRAM this morning to find out if there are plans to make grips available for 10-speed. I guess they had decided not to do that, but they have had so many direct requests from consumers and bike stores that the customer service rep things that they will eventually be available
There might be a technical reason why 10 speed twist shifters might never be available: With twist shifters, the cable needs to be pulled in a circle with a diameter greater than the handlebar diameter. A decent angular separation between each gear might mean significant cable pull. I think this (and not precision shifting) is why SRAM went with their 1:1 derailleur ratio - and why Shimano, sticking to their 2:1 ratio, has never offered twist shifters.

SRAM and Shimano are both using a new different cable pull ratios for their 10 speed MTB derailleurs. Rumors place them somewhere between 1:1 and 2:1. It could be that neither brand will work nicely with twist shifters.