{"product_id":"sunrace-11-51-12-speed-cassette-fw2148-bicycle-cassettes","title":"SunRace CSMZ903 12-Speed Cassette 11-51t Wide Ratio Shimano HG Compatibility Metallic Silver Performance Engineering","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eUpgrade your mountain biking and gravel adventures with the SunRace CSMZ903 12-Speed Cassette - the perfect blend of performance, durability, and versatility. Designed for serious cyclists seeking a wide gear ratio and smooth shifting, this high-quality cassette is compatible with Shimano 12-speed drivetrains, making it a reliable upgrade for both mid-range and high-performance builds.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eMaterials \u0026amp; Construction:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eManufactured with premium metals, the SunRace CSMZ903 features an aluminum shell finished in sleek metallic silver, offering excellent strength-to-weight ratio and corrosion resistance. The robust construction ensures durability under demanding riding conditions, from steep climbs to technical descents.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003ePerformance \u0026amp; Engineering:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003eWith a total gear range of 11-51T and a stunning 464% gear ratio span, this cassette provides exceptional versatility for tackling a variety of terrains. The wide-range design enables efficient power transfer and optimal cadence for climbing steep inclines and reaching high speeds on flats. Precise machining and engineering guarantee smooth, reliable shifting performance across all ratios, reducing drivetrain wear and enhancing rider confidence.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003eComponents \u0026amp; Technology:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003eBuilt with a Shimano HG-compatible body, the SunRace CSMZ903 ensures seamless integration with existing Shimano 12-speed components. The precisely spaced cogs (11-13-15-17-19-21-24-28-33-39-45-51 teeth) deliver accurate gear progression and quick, slip-free shifts. Its lightweight profile (weighing just 497 grams) minimizes rotational mass, enhancing overall bike responsiveness.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003eStyle \u0026amp; Use Case:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003eFeaturing a sleek metallic silver finish, this cassette not only performs at a high level but also adds a modern, stylish touch to your bike's drivetrain. Perfect for gravel riding, mountain biking, and endurance cycling, the SunRace CSMZ903 is the ideal upgrade for cyclists seeking a reliable, wide-ratio cassette to conquer challenging terrains and extended adventures.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative Features \u0026amp; Benefits:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Wide 11-51T gear range for versatile climbing and sprinting\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Compatible with Shimano 12-speed drivetrain systems\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Durable aluminum construction with corrosion-resistant coating\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Precise gear spacing for smooth, quiet shifts\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Stylish metallic silver finish for a modern aesthetic\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003eElevate your cycling experience with the SunRace CSMZ903 12-Speed Cassette - engineered for performance, built for reliability, and designed for riders who demand the best. Optimize your bike's drivetrain today and unlock new levels of confidence on every ride.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eHigh-performance 12-speed cassette designed for seamless compatibility with Shimano drivetrains to ensure smooth shifting and reliable performance on every ride.\u003c\/li\u003e\n\u003cli\u003eConstructed with durable, high-quality materials and featuring a sleek metallic silver finish, this cassette combines style with long-lasting strength for rugged trail or mountain biking adventures.\u003c\/li\u003e\n\u003cli\u003eOffers an extensive 11-51 tooth gear range with a 464% spread, providing precise gear jumps and optimized gearing for climbing steep hills or conquering fast descents.\u003c\/li\u003e\n\u003cli\u003eEngineered with advanced Shimano HG-compatible technology and a robust 11-51t cog configuration, maximizing drivetrain efficiency and reducing wear for sustained high performance.\u003c\/li\u003e\n\u003cli\u003eIdeal for aggressive off-road riding or endurance cycling, the SunRace CSMZ903 Cassette's wide ratio and lightweight (497g) design make it the perfect upgrade for serious cyclists seeking versatility and durability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"SunRace","offers":[{"title":"Default Title","offer_id":42205972922435,"sku":"FW2148","price":119.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/FW2148.jpg?v=1773448200","url":"https:\/\/365cycles.com\/products\/sunrace-11-51-12-speed-cassette-fw2148-bicycle-cassettes","provider":"365 Cycles","version":"1.0","type":"link"}