SUNSHINE-SZ EAGLE 12 SPEED CASSETTE XD 9 - 50 RAINBOW
The SUNSHINE-SZ Eagle 12-Speed Cassette (XD 9-50T Rainbow) offers an expansive gear range and striking aesthetic appeal for 1x mountain bike setups. Engineered for XD driver bodies, it features a 9-tooth smallest cog to maximize top-end speed while providing a light, hollowed-out steel and alloy construction.
Designed as an accessible replacement or upgrade for SRAM Eagle 12-speed drivetrains, this cassette provides crisp gear transitions across varied terrain. High-strength steel cogs ensure resistance against wear, while the large 50T aluminum cog assists with steep, demanding climbs. The oil-slick rainbow finish creates a custom look that complements high-end performance components.
Whether you are updating a daily trail rig or building a custom cross-country setup, this cassette combines broad gearing with distinct visual flair. The open design promotes efficient mud shedding to help maintain consistent shifting performance in harsh, off-road conditions.
Key Features
556% Extended Gear Range: Features a 9-50T tooth configuration to give you higher top-end speed and easier climbing gears than standard 10-50T options.
CNC Hollow Construction: Precision-engineered hollow design minimizes overall rotational weight while maintaining structural stiffness.
Vibrant Oil-Slick Finish: Durable rainbow plating delivers a unique visual aesthetic while helping guard against surface corrosion.
XD Driver Compatibility: Engineered specifically to thread onto standard SRAM XD freehub bodies for a secure, flush fit.
Specifications
Speed: 12-Speed
Tooth Ratio: 9-11-13-15-18-21-24-28-32-36-42-50T
Freehub Interface: SRAM XD
Materials: High-strength steel (9-42T) & 7075 Aluminium (50T)
Weight: Approx. 375g - 395g
Colour: Rainbow / Oil-Slick
Why This IS For You
✅ Broad Gear Range: The tiny 9-tooth cog lets you run a smaller front chainring without losing top-end speed on descents.
✅ Eye-Catching Aesthetics: The vivid rainbow oil-slick coating adds a custom appearance to any modern mountain bike.
✅ Budget-Friendly Upgrade: Delivers ultra-wide 12-speed gearing and lightweight performance at an accessible price point.
Why This May NOT Be For You
❌ Standard HG or Micro Spline Freehubs: Requires a dedicated SRAM XD freehub body and will not mount to standard Shimano HG or Micro Spline hubs.
❌ Pure OEM SRAM Purists: Those who prefer strictly native SRAM XX1 or X01 shifting tolerances may prefer sticking with original factory components.
❌ Heavy E-Bike Torque: Extreme torque demands of full-power e-MTBs may accelerate wear on the aluminium 50T bail-out cog compared to steel options.
BFC PRO TIP
When installing a cassette with a 9-tooth small cog, pay close attention to your chain length and B-gap adjustment. Because the 9T cog is smaller than the standard 10T, double-check your chain wear before fitting; pairing a new cassette with a worn chain will lead to slipping under load and accelerate cog wear!
