Sunrace MX9X 11 speed cassette Black

The Sunrace MX9X 11-speed cassette is specially designed for 1x11-speed drivetrains fitted with a SRAM XD freehub body. Available in 10-42T or 10-46T gearing, it offers a very wide gear range, with a 10T starting sprocket to maximize top speed. Built around an anodized aluminum spider and combining high-strength steel sprockets with a large A7075 aluminum sprocket, the MX9X delivers smooth, fast, and durable shifting for Cross-Country, All-Mountain, and Enduro riding.

Sunrace MX9X cassette highlights

• 10T starting sprocket for SRAM XD freehub bodies: Extends the gear range while maintaining excellent top speed in the smallest sprocket.
• Hybrid high-strength steel and A7075 aluminum construction: The most heavily loaded sprockets are made of high-strength steel for maximum durability, while the largest sprocket and spiders are made of aluminum to reduce weight.
• Fluid Drive Plus technology: Carefully designed tooth profiles and shift ramps ensure crisp, smooth chain movement up and down the cassette, even under heavy pedaling.
• Two gearing options: Versatile 10-42T or ultra-wide 10-46T gearing for tackling the steepest climbs with a single chainring.
• Dual aluminum spiders: Reduce overall weight while providing outstanding torsional stiffness under heavy pedaling loads.

Technical specifications

• Model: Sunrace MX9X.
• Speeds: 11-speed.
• Freehub body compatibility: SRAM XD only.
• Derailleur compatibility: SRAM and Shimano 11-speed drivetrains (a long or compatible derailleur cage is required for the 10-46T version).
• Available gearing:
  - 10-42T: 10-12-14-16-18-21-24-28-32-36-42 teeth
  - 10-46T: 10-12-14-16-18-21-24-28-34-40-46 teeth
• Sprocket materials: 10T to 36T (or 40T) sprockets in steel / Largest sprocket (42T or 46T) in A7075 aluminum.
• Spiders: 2 red anodized aluminum spiders.
• Manufacturer weight: Approximately 458 g (10-42T) / Approximately 502 g (10-46T).

Construction and materials

• Intermediate and small sprockets: High-strength steel with satin chrome or black (ED Black) finish
• Largest sprocket: CNC-machined and anodized A7075 aluminum
• Spiders and spacers: Anodized aluminum
• Lockring: Designed for internal XD mounting

Maintenance and installation recommendations

• Apply plenty of grease to the SRAM XD freehub body threads before installing the cassette to prevent unwanted noise and creaking.
• When you remove it from the box, unscrew the cassette lockring from the assembly.
• Remove all the sprockets, spacers, and both spiders from the XD adapter.
• Install the XD adapter on your wheel's XD freehub body and tighten it clockwise to 40 Nm.
• Then install both spiders, the sprockets, and the spacers on the adapter.
• Thread the cassette lockring clockwise and tighten it to 40 Nm.
• Check your 11-speed chain for wear regularly using a chain wear indicator to protect the teeth on the large aluminum sprocket.
• Clean the drivetrain regularly with a dedicated chain and cassette degreaser, then lubricate it with an oil suited to your riding conditions.

For more information on installation, follow this link: https://sunrace.com/wp-content/uploads/2022/04/Instruction-for-XD%C2%AE-Driver.pdf