Ceramicspeed ospw system sram red force axsthe class leading ospw system is now available for sram red and force axs groupsets'. '.strtoupper('i')t features 15t upper and 19t lower pulleys which deliver an amazing 47% less friction than standard sram axs pulley wheels'. '.strtoupper('t')his fantastic component is perfectly suited for road, gravel and cyclocross riding as it offers durable, reliable and ultra efficient performance'. '.strtoupper('r')eady 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'. '.strtoupper('1')2 speed pulley wheel systemready 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'. '.strtoupper('t')his makes them more than capable of handling the toughest of riding conditions while giving you phenomenal power and control'. '.strtoupper('a')ccommodating a 10 to 33t cassette range, this sleek version enables a customised set up with two spring tensions to suit varying riding conditions'. '.strtoupper('t')his is the ultimate choice of upgrade for riders who want unparalleled performance and reliability from one of the most efficient components on the market.features pulley wheel material aluminium cage material carbon reinforced pa use road, gravel, cyclocross speed 12 speed pulley wheels ceramicspeed 15t upper and 19t lower bearing options ceramicspeed standard or coated ceramicspeed oil pulley oil groupset compatibility sram red axs and sram force axs cassette compatibility 10 33t spring tension settings 2 spring tension settings h high and l lowbuy ceramicspeed components from chain reaction cycles, the world's largest online bike store.