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Race FaceNext SL Crank Arms


Item # RCF008K

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  • Stealth, 170mm ($449.99)
  • Stealth, 175mm ($449.99)
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Item # RCF008K

Next SL Crank Arms

Whether you ride a simple and reliable single-ring drivetrain, or prefer to run a traditional double- or triple-ring setup, the Next SL crank accommodates both. While a one-by uses a direct-mount chainring, a double or triple setup uses the Race Face aluminum spider that is sold separately. They are set into a 30mm spindle, 6mm larger than the previous version, which is fabricated from Race Face’s "super" aluminum, which is purported to be stronger than 7050 series aluminum. Less material and an oversized spindle ensure both a lower weight and increased stiffness—a winning combination for discerning riders and racers.

  • Light, stiff, and strong carbon cranks for XC and trail riding
  • Works with almost any 1x mountain drivetrain (except Shimano 12-speed)
  • Cinch direct-mount interface makes gearing swaps a breeze
  • Can swap for a direct mount spider for double- or triple-ring setups
  • CNC-machined Super Alloy spindle is stronger than 7050 aluminum
  • Please note that chainrings are sold separately
  • Compatible with most modern frame standards with the right Cinch bottom bracket (sold separately)

Tech Specs
Arm Materialcarbon fiber
Arm Length170, 175mm
RingsRace Face Cinch direct mount (not included)
BB TypeRace Face Cinch (not included)
Q Factor170mm
Compatible Components9, 10, 11, and 12-speed mountain drivetrains (except Shimano 12-speed)
Manufacturer Warranty3 years

Actual Weight

Stealth, 170mm
Stealth, 175mm

Actual weights are measured in-house by the Competitive Cyclist team.

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What do you think about this product?



Is the 30mm spindle included? If so, what length is it?

The length is 136mm and the spindle is included.


Is the spindle included? If so, what length is it? I believe I need the 136 to fit a boost 52mm chainline using a Deore cassette.

Great question, the spindle is included, 30mm


Why won’t this work with Shimano 12 speed? Isn’t that dependent on the chainring? Never mind. The folks at race face answered. This IS compatible with shimano 12 speed. You need to update this description. Working great on my wife’s bike.

Came here to say this too. Usually Competitive is on it; this time, not so much!