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- 21 Tooth / 64 BCD
- More Climbing Power – only 33 grams
- Long Lasting / Stainless Steel
- SRAM & Shimano compatible
- Fits 8,9,10 & 11 speed chains
This fits your .
21 Tooth Granny gear, fits most MTB with 64 BCD spacing Works with all Chain Sizes – 8,9,10, & 11 Speed 5% More Climbing Power that a 22T Chainring. Works with all Chains – 8,9,10,11 and 12 speed. Great for 2X drivetrains and 3X drivetrains. Works with Shimano, SRAM, Raceface, FSA, E13 and other MTB cranks. Perfect granny gear for: 8 speed 9 speed 10 speed 11 speed 12 speed Use along with Blackspire, Wolftooth, Absolute Black and other chainrings for 2X and 3X systems.