Shimano SLX Crankset - 170mm
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Product Information
Full details
This Shimano SLX crankset is designed for all-mountain riders seeking a blend of toughness, aggressive performance, and excellent value. Its key benefit is the lightweight yet rigid construction thanks to HollowTech II technology, providing superior stiffness and durability. A caveat is that the SM-CRM75 chainring is sold separately. This crankset offers a robust solution for demanding trails, featuring hollow forged crank arms and an integrated bottom bracket design for enhanced power transfer and longevity. It's built for 12-speed drivetrains and incorporates Shimano's Dynamic Chain Engagement technology for optimal chain retention.
All features
| Model Part Number | FCM7120C |
|---|---|
| Brand | Shimano |
Extended Product Information
FAQs
What bottom bracket do I need for this crankset?
You will need a compatible Shimano HollowTech II bottom bracket designed for your bike's frame shell width and type (e.g., BSA threaded, Press-Fit).
Is the chainring included with the crankset?
No, the SM-CRM75 chainring or other compatible chainring is sold separately. The crankset features a 70-degree spider arm for mounting the chainring.
Can I use this crankset with an 11-speed drivetrain?
While it might physically fit, it is optimized and designed for 12-speed drivetrains. Using it with an 11-speed system may result in suboptimal shifting performance and chain retention.
What is the crank arm length?
The crank arm length for this specific model is 170 mm.
How do I clean the crankset?
Use a soft cloth and mild soap with water to clean the crank arms and spider. Avoid abrasive cleaners or high-pressure washing near the bottom bracket.
What is HollowTech II?
HollowTech II is Shimano's technology for creating lightweight yet rigid crank arms by using hollow forged construction. It also integrates the bottom bracket bearings wider for increased stiffness and durability.
Troubleshooting
Creaking or noise from crankset
Check that the crank arm bolts and lockring are tightened to the correct torque. Ensure the HollowTech II bottom bracket is properly installed, clean, and lubricated. Inspect the chainring for wear or damage.
Chain dropping off chainring
Ensure you are using a compatible 12-speed chainring with Dynamic Chain Engagement technology. Check chainring and derailleur alignment. Adjust rear derailleur limit screws and B-tension.
Stiff or notchy pedal rotation
The HollowTech II bottom bracket may require servicing or replacement. Check for contamination or lack of lubrication in the bottom bracket bearings.
Pros and Cons
Pros
- Lightweight yet strong construction
- Excellent stiffness and power transfer
- Durable for aggressive all-mountain riding
- Modern 12-speed compatibility
- Enhanced chain retention with compatible chainring
Cons
- Chainring sold separately
- Requires compatible HollowTech II bottom bracket
- Specific chain line (55mm) may limit some build choices
Setup, Compatibility & Care
Setup: This crankset requires a compatible Shimano HollowTech II bottom bracket (not included). Installation involves threading the bottom bracket into the frame, followed by mounting the crank arms and securing them according to Shimano's torque specifications. The 70-degree spider arm design dictates the positioning of the compatible chainring (sold separately). Ensure the chain line of 55mm is maintained for optimal drivetrain performance.
Compatibility: Primarily designed for 12-speed drivetrains. Ensure your frame has the correct bottom bracket shell width and type for a HollowTech II BB. The crankset is intended for MTB applications.
Care: Clean the crank arms and spider regularly with a damp cloth and mild soap. Avoid high-pressure washers directly on bearings. Periodically check crank arm bolts and chainring bolts for tightness. If performance degrades, inspect the chainring for wear and the bottom bracket for smooth rotation and proper lubrication.