Prestacycle UniBlock PRO Cassette - 12-Speed For Campagnolo 9-12 Speed Freehub 11-34t Silver Model=Spok Set IS lower headset consists of

IS lower headset consists of a bearing and crown race only

X-Fusion and more

5" Defined Color Purple Size X-Large

Vari-Cushion™ hoods offer comfortable safe grip in any riding position and any off-road condition

Prestacycle UniBlock PRO Cassette - 12-Speed For Campagnolo 9-12 Speed Freehub 11-34t Silver Model=Spok Set IS lower headset consists ofPrestacycle UniBlock PRO Cassettes are machined from a single solid block of cold forged Chrome Molybdenum alloy steel then heat treated tumble finished and electroplated for added durability low friction operation and longer service life. The UniBlock PRO cassettes feature ARC shifting tooth profile technology that provides the fastest smoothest possible shifting to all systems while minimizing the impact to power delivery. Single block design offers