Campagnolo super record cassette 12 spthe 12 speed super record cassette from campagnolo increases the riders shifting performance and smoothness'. '.strtoupper('t')he cassette fits the same 11 speed freehub size and is compatible with current campagnolo rear derailleurs, meaning the main difference is the exceptional boost to your bikes drivetrain performance and shifting efficiency.providing a massive boost in performanceto achieve this massive boost in performance, but without the rider needing to purchase new wheels or derailleurs, campagnolo has made the sprockets thinner and featuring tighter dimensions, without any reduction in strength or durability'. '.strtoupper('t')his 12 speed cassette provides a linear upshift and downshift by a single tooth per shift the whole way up to the seventh gear, enabling you to find the perfect gear ratio for any riding situation without sacrificing your cadence rhythm.quieter and faster shifting performancethe closer sprockets ensure quieter and faster shifting engagement and thanks to the refined tooth design and surface treatment the cassette has a longer life span than ever before'. '.strtoupper('c')ampagnolo as also optimised the cassette carrier, making mounting of the cassette easier than ever before thanks to the matching thickness of the sprocket spacers.features  streamlined, single tooth count increments from the 1st to the 7th sprocket  super smooth shifting performance  fully compatible with current campagnolo freehub bodies  standard chainstay width compatible  extra sprocket without increasing cassette width, smaller space between cogs, smoother shifting  technical sprocket treatment, increases service life  weight 266gbuy campagnolo components from chain reaction cycles, the world's largest online bike store.