The individual tooth profile has moved from the traditional symmetrical shape to more directional specific design with the intention to create a positive chain roller engagement to help with chain retention, critical to prevent chain slip and bounce over rough terrain.
Compatible, but not optimized for, 11 speed chains. Ring only. Crankarms and spindles sold separately.
EA90 SL Alloy
Optimized for 12 Speed Flattop Chains
Cinch System Compatible
Variable Tooth Width
Optimized Retention via Directional Tooth Design
SINGLE DIRECT MOUNT: 36T, 38T, 40T, 42T, 44T
WEIGHT COMPLETE: 442g 172.5mm 40T w/o BB
MATERIAL: EA90 ALUMINUM