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Merlin Cycles£55.00Visit shop Sunrace Black Rx1 Cassette - 11 Speed - / 11-34 / 11 Speed
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The SunRace RX1 11-speed cassette is an ideal upgrade for gravel, city, and road cyclists seeking a reliable and lightweight drivetrain component. It offers an 11-34T gear range that balances top-end speed with climbing capability, utilizing Super Fluid Drive technology for precise gear changes. While it provides excellent performance for HG-compatible systems, users should verify their rear derailleur's capacity to accommodate the 34T large cog before installation.
| Model Part Number | CSRX11.EAVR.OS0.BX |
|---|---|
| Brand | Sun Race |
Yes, it is compatible with standard HG-style 11-speed systems, including most SRAM and Shimano road/gravel setups.
No, it works with standard 11-speed chains.
If your mountain bike uses a standard HG freehub body, it will fit, though it is optimized for road and gravel derailleur geometry.
The RX1 is designed as a lightweight component, though exact weight can vary slightly based on manufacturing batches; it is significantly lighter than entry-level steel cassettes.
Yes, the cassette includes a 6061 alloy lockring.
A short-cage derailleur may not support the 34T cog; ensure your derailleur is rated for a 34T capacity.
Check your rear derailleur hanger alignment and ensure the cable tension is correctly adjusted.
Verify that the lockring is tightened to the specified torque and ensure all spacers were included.
Ensure your B-tension screw on the rear derailleur is adjusted to allow the upper pulley wheel to clear the large sprocket.
Installation requires a standard cassette lockring tool and a chain whip. Ensure your freehub is Shimano/SRAM HG compatible.
Regular maintenance involves cleaning the sprockets with a degreaser after muddy or wet rides to preserve the black finish and ensure the shifting pins remain free of debris. Always verify that your chain is not worn before installing a new cassette to prevent premature gear wear.
