SHIMANO Ultegra 10-Speed Cassette 11-25T Silver — Lightweight, Precise Shifting

Built 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.

How does the CS-6700 deliver faster shifting on 10-speed systems?

This 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.

• Ramped tooth shapes for smoother lateral chain movement
• Precisely spaced 10-speed sprocket pitches for compatibility
• Aluminum carrier riveted to larger sprockets to maintain alignment

Why choose an 11-25t range for my riding style?

An 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.

• Tighter gear jumps for smaller cadence corrections
• Suitable for flatter to rolling terrain or strong climbers
• Lighter overall weight compared to wider-range cassettes

What weight-saving choices are made compared with older Ultegra models?

The 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.

• Aluminum carrier reduces rotating mass on larger sprockets
• Steel cogs where chain contact and wear are highest
• Optimized rivet configuration for strength and reduced weight

Is this cassette compatible with my drivetrain and hub?

The 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.

• Fits Shimano/SRAM 10-speed road freehub bodies
• Works with 10-speed chains and indexed 10-speed shifters
• Ensure derailleur capacity matches overall gear range

Who 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.