
Well after riding SRAM XO for the better part of 3 years, through mud and grime. I have been very pleased with its performance. The only issues I experienced were during the subarctic temperatures of -40c when my shifting would not work. That being said my hydraulic brakes did not work so good either for that matter I didn’t work that well.
SRAM has a new line up coming out called XX, not only does it look HOT, it is also 10sp. one more gear for smooth riding action! They managed to beat Shimano to the punch as well.
Links:
SRAM XX
Mountain Bike Action