UniBlock PRO Cassette direct mount chainrings and a proprietary profile

and a proprietary profile

accompanied by a woven S-logo on the back

Channel your inner Bruni with the Butter Collection

for optimal comfort in every riding position

Fits FSA MegaEvo

UniBlock PRO Cassette direct mount chainrings and a proprietary profilePrestacycle 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. Prestacycle UniBlock