Raceface Atlas (Boost axle)

$135.99

In Stock

RaceFace Atlas Boost crank arms are 7075-alloy, gravity-grade arms built for DH, freeride and enduro. CINCH direct-mount, 30mm spindle and 52mm Boost chainline deliver durable stiffness and precise power transfer.

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Available Options

Option	Price	Availability
Raceface, Atlas Crank Arms, 165mm Black For 68mm or 73mm BB Shell	$135.99	In Stock
Raceface, Atlas Crank Arms, 170mm Black For 68mm or 73mm BB Shell	$135.99	In Stock

Product Details

Overview & Technology

RaceFace Atlas crank arms are engineered for gravity disciplines where strength and stiffness are non-negotiable. Machined from 7075 aluminum, the Atlas arms balance high tensile strength with fatigue resistance so they survive hits and keep pedaling efficient on rough tracks. At 690g for the crankset (arms + interface), Atlas delivers a gravity-ready feel without excessive weight. The Atlas uses RaceFace's CINCH direct-mount interface and a 30mm spindle diameter, giving a rock-solid connection to the drivetrain and superior torsional stiffness compared with slimmer spindles. Specified with a Boost-compatible 52mm chainline and a Boost 136 spindle, it’s optimized for modern Boost hub spacing and shorter chainstays common on aggressive trail and enduro bikes.

Key Features & Construction

7075 aluminum construction — a high-strength aircraft-grade alloy — provides outstanding impact resistance and fatigue life, essential for DH, freeride and dirt-jump use. The machining and heat-treatment process used on RaceFace Atlas arms prioritizes stiffness in the pedal-to-spindle load path so every watt of input transfers cleanly to the drivetrain. • CINCH direct-mount interface for fast chainring swaps and dealer/service-friendly rebuilds. • 30mm spindle for increased torsional stiffness and secure bearing support. • Boost 136 spindle & 52mm chainline tuned to Boost drivetrain geometry. • Durable black finish with robust pedal-threaded ends (9/16" standard).

Fit, Compatibility & Specifications

The Atlas crank arms are available in 165mm and 170mm lengths and are designed as a CINCH direct-mount setup (BCD: Direct Mount CINCH). They fit 68mm or 73mm BB shells using an appropriate 30mm-compatible bottom bracket (BB not included). Chainline is 52mm — optimized for Boost spacing — and the crank spindle diameter is 30mm. Important compatibility notes: the Atlas crankset does not include a bottom bracket or chainring. It accepts RaceFace CINCH direct-mount chainrings and other 30mm CINCH-compatible rings. Pedal threads are standard 9/16". Confirm your frame’s BB standard and choose a compatible 30mm bottom bracket to install the Atlas arms properly.

Who It’s For

The RaceFace Atlas Boost crank arms are built for riders who prioritize durability and stiffness: enduro racers, downhill riders, freeriders and dirt-jumpers who need components that survive abuse and transmit power with minimal flex. If you ride aggressive terrain, hit jumps, and value serviceability, Atlas is tuned to those demands. Atlas is also a smart upgrade for riders swapping from weaker alloy cranks or older spindle standards to a 30mm CINCH interface — you’ll notice crisper power transfer and a more robust platform when the trail gets rowdy.

Key Features

✓ 7075 aluminum construction for high strength and impact resistance
✓ CINCH direct-mount interface for fast chainring swaps and serviceability
✓ 30mm spindle diameter delivers superior torsional stiffness
✓ Boost 136 spindle with 52mm chainline optimized for Boost bikes
✓ Available in 165mm and 170mm lengths to suit rider preference
✓ Durable black finish and standard 9/16" pedal threads
✓ Crankset weight ~690g—gravity-ready without excessive bulk

Specifications

BCD	Direct Mount Cinch
BB Inclusion	No
Chainline	52mm
Crank Spindle Diameter	30mm
Crank Arm Length	165mm
Interface	30mm
Crankset Weight	690g
Crankset Material	Aluminum
Pedals Thread	9/16''
Primary Color	Black
Drivetrain Spacing	Boost

Product Identifiers

Vendor Item #	CK16AA165BLK
UPC	821973279688

Frequently Asked Questions

Does the Atlas crankset include a bottom bracket or chainring?

No. The RaceFace Atlas crank arms are sold without a bottom bracket or chainring. You’ll need a 30mm-compatible bottom bracket and a CINCH direct-mount chainring (or compatible adapter) to complete the build.

What bottom bracket do I need for the Atlas (Boost) crank arms?

Choose a 30mm internal bottom bracket that matches your frame’s shell (68mm or 73mm). The Atlas is sized for a 52mm chainline and Boost spacing, so use a RaceFace/CINCH-compatible 30mm BB for correct fit and alignment.

Are these crank arms compatible with SRAM and Shimano drivetrains?

Yes. The Atlas arms use a CINCH direct-mount chainring interface that works with RaceFace/CINCH direct-mount rings. When paired with appropriate chainrings and a suitable chain (HG, DM, or X-type as specified by the ring), they will work with SRAM and Shimano drivetrains.

Which crankarm length should I choose — 165mm or 170mm?

Shorter arms (165mm) favor quicker clearance and slightly higher cadence for steep, technical riding; 170mm offers a more traditional leverage feel for riders who prefer longer leverage on climbs and sprints. Pick based on your leg length and riding style — many gravity riders choose 165mm for added pedal clearance.

How durable are these arms for downhill and dirt-jump riding?

Very durable. Machined from 7075 alloy and designed for DH/freeride/enduro/dirt-jump use, Atlas arms resist impact and fatigue better than many standard alloy cranks. Regular inspections are recommended after heavy impacts.

What maintenance is required for the CINCH interface?

Inspect the interface and mounting hardware periodically for tightness and wear, clean any debris, and follow RaceFace torque specs when installing chainrings. If bearings or BB components show play, service or replace them per the manufacturer’s recommendations.

Buying Guide

When choosing a gravity-focused crankset like the RaceFace Atlas, prioritize material strength, spindle diameter and interface compatibility. 7075 aluminum offers an excellent strength-to-weight ratio, and a 30mm spindle increases stiffness and bearing support compared with smaller spindles — a valuable trait when launching jumps or charging steep, technical lines. Confirm your frame’s bottom bracket shell width (68mm or 73mm), choose the correct 30mm BB, and pick the crankarm length that matches your riding style and leg length. Also consider the CINCH ecosystem for easy chainring swaps and future upgrades.

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