UniBlock PRO Cassette direct mount chainrings accompanied by a woven S-logo

accompanied by a woven S-logo on the back

Channel your inner Bruni with the Butter Collection

and full perimeter padding

Fits FSA MegaEvo

UniBlock PRO Cassette direct mount chainrings accompanied by a woven S-logoPrestacycle 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