- Shimano 12 speed specific, 55mm chainline for 157mm rear spacing
- Provides the optimal chainline and clearance for your Super Boost 157mm hubs when used with the standard Race Face 136mm spindle
- Also offers an extra 3mm of chainline when used with Boost 148mm hubs
- 7075-T6 aluminum direct mount ring to fit Race Face Cinch system splined cranks
- Narrow-wide teeth prevent chain drop, updated tooth profile runs quieter
- Installs with a common Park Tool BBT-22
UPC: 821973435374