Shimano Deore XT FC-M8000 Left Hand Crank Arm - 165 mm
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Product Information
Full details
The Shimano Deore XT FC-M8000 left-hand crank arm is designed for mountain bike enthusiasts and professional riders who need a reliable, high-performance replacement for their existing FC-M8000 drivetrain system. Offering legendary durability and precise engineering, this component ensures your pedal stroke remains efficient and responsive on the trail; however, users should note that this is a specific replacement part for the M8000 series and is not universally compatible with other crankset models.
All features
| Model Part Number | Y1RL98010 |
|---|---|
| Brand | Shimano Deore XT |
Extended Product Information
FAQs
Is this compatible with FC-M8100 cranksets?
No, this specific part is designed exclusively for the FC-M8000 series.
Does this come with the installation bolts?
This unit typically includes the crank arm; please check your specific package contents for included hardware.
What is the benefit of the 165 mm length?
A shorter crank length can help reduce pedal strikes on technical terrain and may allow for a higher, more efficient pedaling cadence.
Can I use a regular wrench to install this?
You need a 5mm hex key for the bolts and a specific Shimano preload tool for the adjustment cap.
How often should I check the tightness of the bolts?
It is recommended to check your crank arm bolts after the first few rides and then during regular monthly maintenance.
Troubleshooting
Creaking sound while pedaling
Remove the crank arm, clean the spindle and splines, apply fresh waterproof bicycle grease, and reinstall to the correct torque.
Lateral play or wobbling in the crank
Check that the adjustment cap is properly seated and that both pinch bolts are tightened to the manufacturer's specified torque.
Pros and Cons
Pros
- Perfect factory fit for M8000 cranksets
- High-strength material for long-term durability
- Maintains professional-grade shifting and pedaling efficiency
- Easy to install with standard bike tools
Cons
- Limited compatibility only with FC-M8000 series
- Requires specific tools for installation and removal
- Not compatible with non-Shimano bottom bracket systems
Setup, Compatibility & Care
To install this component, ensure you have a standard 5mm hex key for the pinch bolts and a Shimano hollowtech crank installation tool for the plastic end cap.
- Loosen the two pinch bolts on the left-hand crank arm.
- Remove the plastic safety plate from the slot.
- Unscrew the adjustment cap using the dedicated tool.
- Slide the old crank arm off the spindle.
- Align the new crank arm with the splines, ensuring the arm is oriented 180 degrees from the drive-side crank.
- Tighten the adjustment cap to remove play, then evenly tighten the two pinch bolts to the recommended torque specification.
For care, periodically check the pinch bolts for tightness and keep the spindle interface clean of debris.