XX1 Eagle AXS Crank Arm Assembly
Best carbon crank upgrade for serious mountain bike racers.
Elevate your mountain biking experience with the SRAM XX1 Eagle AXS 55CL Crank Arm Assembly. Engineered for serious riders, this premium component boasts a robust 175mm crank length and a sleek Natural Carbon finish. It's designed to integrate seamlessly with 12-speed Eagle drivetrains and features the modern SRAM DUB spindle interface for reliable power transfer. This assembly is sold without chainrings or a spider, requiring a Direct Mount SRAM chainring setup for optimal performance on demanding trails.
$409.99
Owner Satisfaction
4.5
/ 5
Category Rank
671
/ 2111
#671 in Components
Price vs Category Average
+298%
Above average
Crank Length
175
/ mm
Who it's for
- Competitive racers seeking faster acceleration and easier climbing
- Performance riders demanding maximum efficiency from every pedal stroke
- SRAM enthusiasts building a fully integrated electronic drivetrain
Who should skip it
- Budget-conscious cyclists prioritizing value over flagship performance
- Aggressive mountain bikers riding in rocky, high-impact terrain
- Owners of older bikes with non-DUB bottom bracket standards
Performance breakdown
Power Transfer Efficiency
Carbon construction provides exceptional stiffness for immediate, responsive power delivery.
Weight Optimization
Lightweight carbon layup minimizes rotational mass for faster trail acceleration.
Drivetrain Integration
Seamlessly pairs with Eagle ecosystems for precise, reliable shifting performance.
Component Versatility
Direct mount interface offers riders extensive chainring configuration options.
Durability Under Load
Engineered to withstand the high-torque demands of aggressive mountain biking.
Installation Simplicity
DUB spindle standard ensures straightforward setup across most modern frames.
Key Specs
Crank Length
175 mm
Drivetrain Speeds
12
Spindle Interface Type
SRAM DUB
Chainring BCD
Direct Mount SRAM
Crank Intended Use
Mountain
Pedal Spindle
9/16"
Number of Chainrings
No Rings No Spider Included
Color
Natural Carbon
Features
- Optimized for 12-speed Eagle drivetrains
- Utilizes 8-Bolt Direct Mount interface
- Designed for aggressive mountain biking
- Sleek Natural Carbon aesthetic
- Enables precise chainline setup
- Compatible with SRAM DUB systems
What customers say
Customers overwhelmingly praise the SRAM XX1 Eagle AXS Crank Arm Assembly for its exceptional performance and premium quality. Riders consistently highlight the incredible stiffness of the carbon arms, noting a tangible improvement in power transfer and pedaling efficiency for a more responsive trail feel. The sleek design and high-end finish also receive frequent commendation. Integration within the AXS ecosystem provides a seamless and reliable wireless experience. While a significant investment, serious riders agree that the superior performance gains and elevated riding experience fully justify the cost. This component is widely regarded as a pinnacle of mountain bike technology, delivering unparalleled performance.
Know before you buy
No, the XX1 Eagle AXS crank arm assembly is sold as arms only. You will need to purchase a compatible SRAM 8-bolt direct mount chainring separately to complete the setup.
This assembly uses the SRAM DUB spindle interface. To ensure compatibility, you must use a SRAM DUB bottom bracket that matches your bike frame's shell standard.
These arms are specifically optimized for 12-speed Eagle drivetrains. While they may physically fit other setups, the chainline and performance are engineered to work best within the Eagle ecosystem.
The 8-bolt interface provides a more secure and rigid connection for your chainring compared to older standards. It is specifically required for compatibility with current SRAM AXS power meter spiders and direct mount rings.
175mm is a standard length for many mountain bikes, but it is important to check your frame's geometry and your personal riding preference. Shorter cranks are sometimes preferred for technical terrain to increase ground clearance, so verify your current setup before purchasing.
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