Sram 11spd xg1190 cassette the hollow steel dome makes this the stiffest gear cluster but at the lightest weight the heat treated high grade steel cogs provides excellent durability and a finish to match features srams stealthring which helps eliminate vibration and noise compatible with pc1170 and red 22 chains wifli 11 30 and 11 32 cassette options weight 196g 11 32