Shimano FC-R9200 Left Hand Crank Arm Unit - 170 mm
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Product Information
Full details
The Shimano FC-R9200 Left Hand Crank Arm Unit is designed for dedicated road cyclists and professionals using the Dura-Ace R9200 drivetrain who need a reliable, high-performance replacement component. Engineered for precision, this 170 mm arm maintains the structural integrity and shifting efficiency of your crankset, though it is exclusively compatible with the R9200 series, limiting its use for older or mixed-component groupsets.
All features
| Model Part Number | Y0MZ98070 |
|---|---|
| Brand | Shimano |
Extended Product Information
FAQs
Is this compatible with the FC-R9100 crankset?
No, this unit is specifically engineered for the FC-R9200 series and is not compatible with the previous R9100 generation.
Does this include the fixing bolt?
The product is the left hand crank arm unit; please check your existing fixing bolt for reuse or source a new genuine Shimano bolt if yours is damaged.
How do I determine if 170 mm is the right length?
Check your existing crank arm for a laser-etched length marking on the inside near the pedal hole. If your current setup is 170 mm, this is the correct replacement.
Can I use this with a power meter?
This is a standard crank arm. If your power meter is integrated into the left crank arm, this unit will not contain those electronic components.
What tools are required for installation?
You will need an 8 mm hex wrench for the main bolt and a Shimano TL-FC16 or compatible crank installation tool for the safety plate.
Troubleshooting
Crank arm feels loose after installation
Verify that the safety plate is correctly engaged and the fixing bolt is torqued to the specific 12-14 Nm recommendation.
Difficulty sliding arm onto spindle
Check the splines for debris or damage. Apply a small amount of marine or synthetic grease to the splines to facilitate smooth insertion.
Pros and Cons
Pros
- Genuine OEM component ensures maximum compatibility
- Maintains professional-grade performance standards
- Precise weight-to-stiffness ratio
- Easy installation for standard Shimano crank systems
Cons
- Compatible only with FC-R9200 cranksets
- Not backward compatible with earlier Dura-Ace generations
- Limited to 170 mm length
Setup, Compatibility & Care
To install this crank arm, you will need a standard 8 mm hex wrench for the crank arm fixing bolt and a Shimano crank tool to secure the safety plate. Ensure the crank splines are clean and lightly greased with high-quality bicycle grease before sliding the arm onto the spindle. Once the arm is pushed fully onto the spindle, tighten the fixing bolt to the manufacturer's specified torque settings—typically 12-14 Nm—to prevent loosening or damage to the splines. For care, avoid using high-pressure water washers directly on the bottom bracket area; instead, wipe the crank arm down with a soft, damp cloth and mild soap to maintain its finish and prevent oxidation.