UniBlock PRO Cassette direct mount chainrings Channel your inner Bruni with

Channel your inner Bruni with the Butter Collection

for optimal comfort in every riding position

Rolled Finger Tips for Seamless Feel and Better Dexterity

accompanied by a woven S-logo on the back

The Fidlock magnetic buckle allows quick and easy fastening

UniBlock PRO Cassette direct mount chainrings Channel your inner Bruni withPrestacycle 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