With the huge popularity of 1x drivetrains, SRAM brought the XD driver to allow for a 10 tooth smallest gear. This gave riders the ability to not sacrifice gear range while ditching the front derailleur. The greatest obstacle for many riders has long been the cost of the high end SRAM components. SRAM GX is now a game changer, offering lightweight and high quality components for both 1x and 2x builds. FULL PIN(TM) technology uses ten lightweight, stamped steel cogs held together with 123 high-strength stainless steel pins. The result: a cassette that's light, durable and equipped with SRAM's super wide 10-42 gear range that's a perfect fit for any ride. The open design similar to our X-DOME(TM) cassette aids in mud clearance, giving you cleaner shifting performance and longer component life. Features: FULL PIN(TM) technology uses ten lightweight, stamped steel cogs and one 42t aluminum cog held together with 123 high-strength stainless steel pins Super wide 10-42t gear range-a perfect fit for any ride Optimized gear steps across entire range Open design aids in mud clearance XD(TM) driver body creates more stable hub connection Specifications: Technology Highlight(s): FULL PIN(TM), XD(TM) DRIVER BODY, JET(TM) Weight: 394g Material: 4130 chromoly steel Gear Ratios: 10-42t Speeds: 11-speed Colors: Black Recommended Chain: PC-X1 Recommended Group: SRAM GX 1x11, SRAM GX 2x11 Cogs: 10-12-14-16-18-21-24-28-32-36-42 Compatibility: XD(TM) Driver Body Note: Sram XD cassettes can be used on a XD driver, or a XDR driver can be used with a 1.85mm spacer.