SunRace CSM63 7 Speed Cassette - CSM637AS
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SUNRACE CSM637AS 7 SPEED CASSETTE – 11-28T 7 SP - NICKEL M63Free delivery in 1–3 days£19.99Visit shop →
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Leisure Lakes BikesSunRace CSM63 Satin Finish 7 Speed S-Race Cassette Silver
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SunRace CSM63 Satin Finish 7 Speed S-Race Cassette SilverFree delivery in 1–3 days£21.99Visit shop →
Product Information
Full details
The SunRace CSM63 7 Speed Cassette is an ideal drivetrain upgrade for cyclists looking for reliable, consistent shifting on 7-speed mountain or hybrid bike setups. Featuring Super Fluid Drive technology, this cassette provides seamless gear transitions and durability in a lightweight 248g package, though users should ensure their current derailleur and shifter hardware is calibrated for a 7-speed index to maximize performance.
All features
| Model Part Number | CSM637AS |
|---|---|
| Brand | SunRace |
Extended Product Information
FAQs
Is this cassette compatible with 8 or 9-speed shifters?
No, this cassette is designed specifically for 7-speed index shifting. It will not work accurately with shifters designed for other gear counts.
Can I use this with a standard bike chain?
Yes, it is compatible with standard bicycle chains designed for 7-speed drivetrains.
Does this cassette come with a lockring?
Yes, the cassette includes the necessary lockring for installation.
What is the weight of the CSM637AS?
The cassette weighs approximately 248g.
Is this suitable for e-bikes?
While durable, this is primarily designed for standard human-powered bicycles. Check your e-bike motor torque specifications before installation.
Troubleshooting
Poor or skipped shifting
Check your rear derailleur hanger alignment and ensure your cable tension is correctly indexed for a 7-speed shifter.
Cassette feels loose on the freehub
Verify that the lockring is tightened to the recommended torque specification and check if a spacer is required behind the cassette.
Pros and Cons
Pros
- Reliable and consistent shifting performance
- Lightweight construction at 248g
- Corrosion-resistant nickel finish
- Easy installation for standard HG-compatible freehub bodies
Cons
- Limited to 7-speed drivetrain systems only
- Requires specific 7-speed chain compatibility
- Narrower gear range compared to modern 10 or 12-speed systems
Setup, Compatibility & Care
To install the SunRace CSM63, you will need a standard cassette lockring tool and a chain whip. Ensure your freehub body is clean and lightly greased before sliding the cassette into place.
Compatibility:
- Designed specifically for 7-speed drivetrain setups.
- Fits standard Shimano-style HG freehub bodies.
Care and Maintenance:
- Regularly clean the cassette with a bicycle-specific degreaser to remove grit that accelerates wear.
- Inspect your chain for 'stretch' periodically; a worn chain will significantly shorten the lifespan of your cassette teeth.
- Keep the drivetrain lightly lubricated to maintain the effectiveness of the Super Fluid Drive profiles.