Wide range 2x10 and 3x10 systems with x glide front shifting technology high clamp low clamp high direct mount low direct mount speeds 10 speed for 2x10 system 10 speed for 3x10 system weight 130 grams compatibility 10 speed only 36 tooth mount options high clamp low clamp 318 349 382low direct mount s1 s3 high direct mount pull top or bottom technology x glide shifting technology