TheShimano Dura Ace CS-9000 11 Speed Cassetteis an incredibly light-weight and rigid high end road bike cassette that produces incredibly fast, accurate and reliable shifts even in the trickiest of riding conditions! With a rigid Carbon and Alloy carrier the Shimano Dura Ace 9000 Cassette is able to produce even under the most demanding gear changes, and when combined with the Hyperglide EV sprockets which uses contoured shift gates the shifting performance is incredibly smooth even under excessive loads! The 5 largest sprockets on the Cassette are made from titanium, this is to help reduce weight even further without having any sacrifice on the strength of the unit, the weight savings are seen...
Best Price: £169.99 from Leisure Lakes Bikes