This fantastic component is perfectly suited for road, gravel and cyclocross riding as it offers durable, reliable and ultra-efficient performance. Ready to dominate across mixed terrains, this brilliant model is specifically developed to withstand the rigours of a long day in the saddle from the smooth city streets to the rocky forest trails. 12 Speed Pulley Wheel System Ready for action, these hand built bearings sit within a pair of oversized pulleys which are fitted with a custom-designed and carbon-reinforced PA cage. This makes them more than capable of handling the toughest of riding conditions while giving you phenomenal power and control. Accommodating a 10 to 33T cassette range, this sleek version enables a customised set up with two spring tensions to suit varying riding conditions. This is the ultimate choice of upgrade for riders who want unparalleled performance and reliability from one of the most efficient components on the market.