Complete 12-speed upgrade set for standard HG freehub bodies

Upgrade your drivetrain to a 12-speed system without replacing your rear wheel or freehub body. Replacing your chain and cassette together ensures crisp shifting performance and significantly extends the wear life of both components.

This bundle pairs the SunRace CSMZ903 cassette with a durable SRAM NX Eagle 12-speed chain. Designed to fit standard Shimano/SRAM HG freehub bodies, this set offers a hassle-free entry into 12-speed setups. Featuring an 11-51T range with optimized step jumps on the largest cogs (39T, 45T, 51T), it delivers excellent gear distribution for steep climbs.

• SunRace CSMZ903 Cassette (11-51T): Mounts on standard HG freehubs (no XD or Micro Spline required). Lockring included.
• SRAM NX Eagle Chain (126 Links): Heavy-duty 12-speed chain complete with a PowerLock connecting link.
• Lightweight Hybrid Design: Features 3 CNC-machined aluminum largest cogs and durable steel smaller cogs.
• Optimized Gear Steps: 39-45-51T top sprockets match Shimano's 12-speed progression for smoother cadence transitions.
• Cross-Brand Compatibility: Works seamlessly with both SRAM Eagle and Shimano 12-speed derailleurs.