Easton EC90 SL Crank Arms Only - 172.5mm
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Easton EC90 SL Crank Arms Only BlackFree delivery in 1–3 days£419.99Visit shop →
Easton EC90 SL Crank Arms Only BlackFree delivery in 1–3 days£419.99Visit shop →
Easton EC90 SL Crank Arms Only BlackFree delivery in 1–3 days£419.99Visit shop →
Product Information
Full details
The Easton EC90 SL Crank Arms are designed for performance-minded cyclists in road, cyclocross, and triathlon disciplines who demand a lightweight, adaptable drivetrain solution. By utilizing the versatile Race Face Cinch system, these carbon crank arms offer exceptional modularity for both 1x and 2x setups, providing riders with reduced friction and superior chain retention; however, users must ensure their frame is compatible with a 30mm spindle standard before installation.
All features
| Model Part Number | EACK20EC90SL129ARM172BLK |
|---|---|
| Brand | Easton |
Extended Product Information
FAQs
Are chainrings included with the EC90 SL Crank Arms?
No, these are provided as crank arms only. You will need to purchase the appropriate Cinch direct mount ring or spider separately.
Can I use these on a frame with a standard 24mm bottom bracket?
No, these cranks are designed specifically for a 30mm spindle and require a compatible bottom bracket.
Is the Cinch system compatible with SRAM or Shimano chainrings?
The Cinch system uses a proprietary Easton/Race Face interface for direct mount rings. You must use rings compatible with the Cinch standard.
What is the Q-factor of these crank arms?
The EC90 SL crankset features a road-specific 149mm Q-factor.
How often should I service the spindle interface?
It is recommended to inspect and re-grease the interface during your regular seasonal maintenance or whenever the cranks are removed for bottom bracket service.
Troubleshooting
Audible creaking during pedaling
Remove the crank arms, clean the spindle and interface surfaces, apply a fresh layer of high-quality bike grease, and re-torque the system.
Crank arms feel loose or have lateral play
Adjust the preload collar on the spindle until the play is eliminated, ensuring the arms rotate freely without binding.
Pros and Cons
Pros
- Lightweight hollow carbon design
- Highly versatile Cinch interface for easy chainring changes
- Compatible with a wide array of road bottom bracket standards
- Excellent chain retention capabilities
Cons
- Requires 30mm spindle compatible bottom bracket
- Professional installation recommended for bottom bracket preload
- Chainrings and spiders sold separately
Setup, Compatibility & Care
These crank arms are compatible with BB86, BSA, PF30, and BBright bottom bracket standards. Installation requires a specialized bottom bracket capable of accepting a 30mm spindle. When mounting, ensure the Cinch interface is clean and lightly greased to prevent creaking. Use a torque wrench for all bolts, adhering to the manufacturer's specified values. For maintenance, wipe the carbon surface with a damp cloth and avoid harsh chemical cleaners. Periodically check the crank arm bolts for tightness to ensure optimal performance and safety.