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.
R**S
The 21T fit my SRAM S-1250 with no alterations!
Stoked to report that on my Specialized Stumpjumper Comp EVO the stock SRAM S-1250, 7050 alloy arms, 10-speed Trail double, PF30 spindle, 36/22, 104/64mm BCD spider, your aMTBer 21T fit without any alteration. The difference while climbing is almost imperceptible but it definitely makes a difference on the very hardest of climbs or steep features. Just that little extra bit I needed to grid it out and not hike-a-bike. Thanks!
S**3
only for grannys... literally :-(
This chainring is too small and will bend as soon as you accidentally cross your chain into the high end of the cassette. When that happens you'll get dreaded "chainsuck" and need to bend the ring back with pliers. If you're looking for a lower granny gear get a cassette with more teeth in the large cog instead. You'll save yourself a lot of frustration. BTW, I am actually a confirmed owner... bought mine off ebay but obviously not crazy about it.
Trustpilot
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