Key features

• •【Factory Pre-Assembled Design】 The ZTTO cassette comes partially assembled, with the main gear already in place and additional small cogs plus a lockring included. This eliminates the complexity of gear installation, making it quick and user-friendly—even for DIY beginners.
• •【Built with High Tensile Steel for Durability】 Manufactured with quench-temper hardened high tensile steel, this cassette resists abrasion, corrosion, and heavy wear. Whether you ride daily or tackle tough trails, the build ensures long-term performance without compromise.
• •【Wide Gear Range for All Riders】 With gear options ranging from 11-25T to 11-50T, this cassette caters to all riding styles—whether you need high-speed efficiency on the road or lower gears for tough mountain climbs.
• •【Compatible with HG & HGR Freehubs】 Designed to work with both HG and HGR freehub standards—two of the most widely used systems—this cassette ensures compatibility across a wide array of bikes. It's an ideal upgrade for road, gravel, or mountain bikes.
• •【Enhanced Shifting with ZTTO Accurate Shift Tec】 ZTTO's proprietary Accurate Shift Technology features a precisely machined sprocket design that delivers crisp and seamless shifting. Enjoy stable gear changes even under load or on uneven terrain.
• •【Corrosion-Resistant Finish】 Available in sleek Silver and Black Silver color options, the surface treatment not only enhances aesthetics but also protects against rust, extending the product's lifespan.