{"product_id":"shimano-ultegra-10-speed-cassette-11-25t-silver-lightweight-precise-shifting","title":"SHIMANO Ultegra 10-Speed Cassette 11-25T Silver — Lightweight, Precise Shifting","description":"\u003cstrong\u003eShimano Ultegra CS-6700 is a 10-speed, 11-25t road cassette that blends reduced weight and precise shifting for competitive riders seeking Dura-Ace performance at a lower cost.\u003c\/strong\u003e\n\n\u003cp\u003eBuilt for road cyclists who want reliable, crisp gear changes without paying the Dura-Ace premium, the CS-6700 Ultegra cassette uses a mix of steel cogs and an aluminum carrier to shave grams where it matters. The 11-25 tooth spread suits riders focused on close-ratio gearing for fast group rides, crits, and efficient cadence control. Its silver finish complements most drivetrains and resists the visual wear common on untreated cassettes.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the CS-6700 deliver faster shifting on 10-speed systems?\u003c\/h3\u003e\n\u003cp\u003eThis cassette adopts Ultegra-level tooth profiling and precise machining to ensure consistent chain engagement. The ramped and chamfered teeth guide the chain during upshifts and downshifts, reducing hesitation and missed shifts even under moderate load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRamped tooth shapes for smoother lateral chain movement\u003c\/li\u003e\n  \u003cli\u003ePrecisely spaced 10-speed sprocket pitches for compatibility\u003c\/li\u003e\n  \u003cli\u003eAluminum carrier riveted to larger sprockets to maintain alignment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose an 11-25t range for my riding style?\u003c\/h3\u003e\n\u003cp\u003eAn 11-25t cassette keeps gear steps tighter, letting you maintain an efficient cadence during fast efforts and group tempo work. It’s ideal for riders who favor speed and cadence consistency over very low climbing gears.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTighter gear jumps for smaller cadence corrections\u003c\/li\u003e\n  \u003cli\u003eSuitable for flatter to rolling terrain or strong climbers\u003c\/li\u003e\n  \u003cli\u003eLighter overall weight compared to wider-range cassettes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat weight-saving choices are made compared with older Ultegra models?\u003c\/h3\u003e\n\u003cp\u003eThe CS-6700 sacrifices minimal durability to gain weight savings by riveted aluminum carriers for the largest cogs and thinning of non-load-critical material. Compared to the earlier 6600 series, it trims grams while retaining the robust steel teeth where wear matters most.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAluminum carrier reduces rotating mass on larger sprockets\u003c\/li\u003e\n  \u003cli\u003eSteel cogs where chain contact and wear are highest\u003c\/li\u003e\n  \u003cli\u003eOptimized rivet configuration for strength and reduced weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this cassette compatible with my drivetrain and hub?\u003c\/h3\u003e\n\u003cp\u003eThe CS-6700 is designed for Shimano 10-speed road drivetrains and fits standard Shimano-compatible freehub bodies. It pairs with 10-speed chains and derailleurs; double-check long-cage derailleur limits only if switching from much wider ranges.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Shimano\/SRAM 10-speed road freehub bodies\u003c\/li\u003e\n  \u003cli\u003eWorks with 10-speed chains and indexed 10-speed shifters\u003c\/li\u003e\n  \u003cli\u003eEnsure derailleur capacity matches overall gear range\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The Shimano Ultegra CS-6700 11-25t cassette is aimed at racers, club riders, and weight-conscious cyclists who want near top-tier shifting performance without the Dura-Ace price. It’s especially good for riders prioritizing close gear ratios for pace-line work, criteriums, and road events on mostly rolling or flat courses. If you need a wider low gear for steep, prolonged climbs, consider a cassette with a larger largest sprocket; otherwise this Ultegra cassette balances weight, durability, and crisp shifting for demanding road use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the CS-6700 fit my 10-speed Shimano wheel hub?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The CS-6700 fits standard Shimano\/SRAM 10-speed road freehub bodies and works with 10-speed chains and derailleurs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this cassette for steep climbs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It’s optimized for close ratios; an 11-25t suits rolling terrain and fast rides. For steep climbs, choose a cassette with a larger largest sprocket.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SHIMANO","offers":[{"title":"Default Title","offer_id":59363069362524,"sku":"B002MWGVFC","price":96.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1059\/5604\/9244\/files\/shimano-ultegra-cs-6700-front-view.jpg?v=1791217307","url":"https:\/\/sportium.co.uk\/products\/shimano-ultegra-10-speed-cassette-11-25t-silver-lightweight-precise-shifting","provider":"Sportium Sports And Outdoors","version":"1.0","type":"link"}