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Race Face
Aeffect EXI Crank Arms

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Why We Like The Race Face Aeffect EXI Crank Arms

Now available with a black satin finish and two-tone graphics, Race Face's popular Aeffect EXI Crank Arms are a rock solid option for aggressive trail riding. With a more accessible price point than its higher-end siblings, the Aeffect provides the freedom of a modular crank design for your trail, XC, or enduro frame without requiring you to empty your wallet to afford it. Built dependably with a forged, 6066 aluminum construction, the Aeffect may not boast the same bombproof self-assuredness of its burlier siblings, but it still has a commendable strength-to-weight ratio for aggressive trail, XC and all-mountain/enduro riding.

Just like its pricier siblings, the Aeffect boasts compatibility with a wide range of bottom bracket standards, but unlike them, it's delivered with a slimmer 24mm spindle. This means it's compatible with Race Face X-Type bottom brackets, but works with certain other BB's designed for 24mm spindles as well, such as those offered by Shimano. Swapping chainrings is quick and user-friendly with the Cinch interface, which is compatible with 10, 11, or 12-speed one-by drivetrains if you use a Race Face Narrow-Wide Cinch direct mount chainring. The beauty of the modular design is that you can also mount a Race Face Cinch direct mount spider to run a double chainring setup if that's your preference. Quiet and consistent, the Aeffect EXI shows, unsurprisingly, that Race Face has its tech and construction dialed on modular cranksets, and that a more affordable option doesn't have to mean a sacrifice on either account.


  • Sturdy and affordable crank arms for XC, trail, or enduro
  • Modular design is adaptable to 1x or 2x drivetrains
  • Cinch direct mount interface makes chainring swaps a breeze
  • Forged aluminum construction improves stiffness & durability
  • 24mm spindle fits most frames if you get the right bottom bracket
  • Bottom bracket and chainring not included
  • Compatible with Boost, Superboost, and non-Boost hub spacing
  • Compatible with SRAM and Shimano 11 and 12-speed drivetrains
  • Item #RCF007B
Arm Material
forged 6066 aluminum
Arm Length
165mm, 170mm, 175mm
Bolt Circle Diameter
direct mount
BB Type
Race Face X-Type (other bottom brackets designed for 24mm spindles may work)
Compatible Components
Race Face Cinch direct mount chainrings and spiders, Race Face X-Type bottom brackets
Manufacturer Warranty
1 year
trail, enduro, cross-country

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