XX1 grip shifters come with both grips (and look the same).. you may be able to buy just the left-hand grip as a spare part - try your local SRAM stockist.
Posted : 06/03/2015 3:43 pm
I 'might' have some left hand grips, I never use them as I prefer ESI grips anyway. I'll take a look later.
Posted : 06/03/2015 6:47 pm
