SunRace CSMZ933 Cassette - 12 Speed - 10-51T - Micro-Spline

The SunRace CSMZ933 12-Speed Cassette offers a versatile 10-51T gear range, perfect for tackling c...

Best current price£129.00from Merlin Cycles

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Merlin CyclesSunrace Metallic Csmz933 Microspline Cassette - 12 Speed - / 10-51 / 12 Speed
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£129.00
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eBaySunrace MZ933 Cassette 12 speed 10-51 T | Micro Spline Shimano fitting CSMZ933
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£132.59
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Product Information

Full details

The SunRace CSMZ933 12-Speed Cassette is designed for advanced mountain and gravel bikers who demand a broad gear range for technical terrain. It provides a massive 10-51T spread, allowing for efficient climbing and high-speed pedaling, though users must ensure their wheelset is specifically equipped with a Shimano Micro-Spline freehub body to guarantee compatibility.

All features

Model Part NumberCSMZ933
BrandSunRace

Extended Product Information

FAQs

Will this fit on a standard HG freehub?

No, this cassette requires a Shimano Micro-Spline freehub body.

What is the weight of the CSMZ933?

The cassette weighs approximately 526g.

Can I use this with a SRAM 12-speed derailleur?

While it may function, it is optimized for Shimano 12-speed systems; check for full drivetrain compatibility before mixing brands.

What tools do I need for installation?

You need a standard cassette lockring tool and a torque wrench.

Is the lockring included?

Yes, it includes a distinctive red alloy lockring.

Troubleshooting

Cassette does not fit on the freehub body.

Verify that your wheelset is using a Shimano Micro-Spline freehub body; this cassette will not fit on HG or XD drivers.

Shifting feels hesitant or noisy.

Check your derailleur hanger alignment and ensure your cable tension is indexed correctly for a 12-speed system.

Lockring keeps coming loose.

Ensure the lockring threads are clean, lightly greased, and tightened to the specific torque value printed on the lockring.

Pros and Cons

Pros

  • Wide 10-51T gear range covers most riding conditions
  • Reliable and precise shifting performance
  • High-quality build for long-term durability
  • Attractive aesthetic with red alloy lockring
  • Optimal weight for a performance-focused drivetrain

Cons

  • Limited exclusively to Micro-Spline freehub bodies
  • Requires a 12-speed compatible derailleur and chain
  • Slightly heavier than top-tier ultra-light carbon/titanium models

Setup, Compatibility & Care

To install this cassette, you must have a bike equipped with a Shimano Micro-Spline freehub body. Use a standard lockring tool to tighten the red alloy lockring to the manufacturer's specified torque rating to prevent loosening during rides. Because this is a 12-speed component, ensure your derailleur has the capacity to handle a 51T cog and that you are using a 12-speed compatible chain. Regular maintenance includes cleaning debris from between the cogs using a stiff brush and applying a high-quality bicycle chain lubricant to keep the shifting crisp.

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