X-LAB Branta Carbon Road Crank Arms | AD8 • AD9 • RT9 | 162.5-172.5mm
X-LAB Branta Carbon Road Crank Arms | AD8 • AD9 • RT9
Optimize your fit without sacrificing performance.
The X-LAB Branta Carbon Crank Arms allow riders to fine-tune their bike fit while maintaining full compatibility with the factory Branta crank-based power meter system found on the X-LAB AD8, AD9 and RT9.
Available in 162.5mm, 167.5mm, 170mm, and 172.5mm lengths, these genuine X-LAB replacement crank arms are perfect for riders seeking improved pedaling efficiency, increased comfort, or a professional bike fit adjustment.
Constructed from lightweight carbon fiber, the complete crank arm and spindle assembly weighs just 320 grams, delivering excellent stiffness while keeping overall bike weight to a minimum.
The integrated 29mm Road spindle is engineered specifically for the Branta crank platform and is fully compatible with the factory Branta crank-based power meter system.
Key Features
- Genuine X-LAB replacement crank arm set
- Designed specifically for the Branta crank platform
- Compatible with Branta crank-based power meter
- Carbon fiber crank arm construction
- Integrated 29mm Road spindle
- Lightweight 320 gram complete assembly
- Available in four crank lengths
- Factory upgrade for AD8, AD9 and RT9
Available Sizes
- 162.5mm
- 167.5mm
- 170mm
- 172.5mm
Technical Specifications
- Brand: X-LAB / Branta
- Application: Road & Gravel
- Construction: Carbon Fiber
- Spindle: Integrated 29mm Road Spindle
- Weight: 320 grams (complete crank arm & spindle assembly)
- Power Meter Compatible: Yes
- Power Meter Platform: Branta Crank-Based Power Meter
Compatible Bikes
- X-LAB AD8
- X-LAB AD9
- X-LAB RT9
Why Change Crank Length?
Changing crank length has become one of the most effective bike fit upgrades available. Riders often choose shorter crank arms to:
- Open hip angle for improved comfort
- Reduce knee strain
- Improve pedaling efficiency
- Increase cadence
- Create additional pedal clearance while cornering
- Optimize aerodynamic riding position
Why You'll Love It
- OEM X-LAB quality and finish
- Maintains factory power meter compatibility
- Extremely lightweight carbon construction
- Professional-level bike fit adjustment
- Easy way to customize your riding position
- Ideal upgrade for serious road and gravel cyclists
Before You Buy
- This crank arm set is designed specifically for the X-LAB Branta crank platform.
- Compatible with X-LLAB AD8, AD9 and RT9 bicycles equipped with the Branta crank-based power meter.
- Please verify the desired crank length before ordering.
- Professional installation and proper torque procedures are recommended.
The X-LAB Branta Carbon Crank Arms provide riders with a premium factory solution for dialing in bike fit while preserving the exceptional performance and power measurement capabilities of the Branta drivetrain.