SUNSHINE-SX EAGLE 12 SPEED CASSETTE XD 9 - 50 BLACK

The SUNSHINE-SX Eagle 12-Speed Cassette (XD 9-50T Black) provides a massive 556% gear range for modern 1x mountain bike drivetrains. Designed specifically for XD driver bodies, it features an ultra-small 9-tooth cog that expands your top-end speed without requiring a larger chainring.

Built with high-strength steel cogs for the lower gears and a lightweight 7075-grade aluminium 50T bail-out cog, this cassette handles tough off-road climbing and fast trail descents. Its sleek, stealth-black finish complements any custom build while offering durable surface protection against dirt and corrosion.

Whether you are looking to replace a worn drivetrain or upgrade to an extended-range setup, this unit delivers budget-friendly performance across varied terrain. The open-designed architecture aids in mud-shedding, maintaining crisp and reliable gear changes in harsh conditions.

Key Features

• Extended 556% Gear Range: The tiny 9-tooth cog provides a higher top-end gear than standard 10T cogs, giving you more speed on fire roads and descents.

• Hybrid Alloy & Steel Construction: Utilises ultra-high-strength steel for high-wear smaller cogs and lightweight 7075 aluminium for the large 50T climbing gear.

• Stealth Black Finish: Hard-wearing black coating offers a clean, subtle aesthetic that integrates seamlessly with modern MTB groupsets.

• SRAM XD Driver Fitting: Engineered specifically to mount securely onto standard SRAM XD freehub bodies.

Specifications

• Speeds: 12-Speed

• Tooth Ratio: 9-11-13-15-18-21-24-28-32-36-42-50T

• Freehub Compatibility: SRAM XD Hubs Only

• Drivetrain Compatibility: Compatible with SRAM Eagle 12-Speed systems (SX, NX, GX, X01, XX1)

• Materials: High-Strength Steel (9–42T) & 7075 Aluminium Alloy (50T)

• Weight: Approx. 512g–535g

• Colour: Black

Why This IS For You

✅ Wider Range for Less: The 9-50T ratio gives you expanded gearing compared to standard 10-50T cassettes, letting you drop a front chainring size to gain ground clearance without losing top speed.

✅ Stealthy Aesthetic: The deep black finish fits understated, modern trail and enduro bike builds perfectly.

✅ Budget-Friendly XD Replacement: Offers a cost-effective alternative to high-end OEM cassettes for riders using an XD freehub body.

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 Shimano Micro Spline or standard HG hubs.

❌ Heavy E-Bike Mid-Drive Use: High-torque motor outputs on e-MTBs may cause premature wear on the aluminium 50T cog compared to full-steel e-bike options.

❌ Weight-Obsessed XC Racers: While lightweight for its price tier, ultra-lightweight CNC-machined monoblock cassettes weigh less for top-tier racing applications.

BFC PRO TIP

Because a 9-tooth cog wraps fewer teeth around the chain than standard cogs, proper drivetrain setup is vital. Ensure your derailleur B-gap is set precisely using the manufacturer's gauge, and always fit a fresh 12-speed chain with a new cassette to prevent slipping under heavy pedalling loads!