The 11 speed 188 freehub body kit from zipp is a genuine replacement zipp part available for either shimano and sram drivetrains or campagnolo drivetrains they are compatible with v8 2013 and v9 2014 zipp rear wheels they come in 2 colours for easy identification the blue one is designed for campagnolo drivetrains and the red is designed for sram and shimano drivetrains for compatibility with 10 speed shimano and sram drivetrains you must use the spacer after installation