Aero-style design offers unparalleled stiffness with a competitive weight.

The application of ROTOR’s latest generation of tooth profiles, shifting gates and pins guarantee problem free, slick and fast shifts in any weather.

Micro-indexing OCP system increases chainring tuneability in regards to standard 4-arm cranks.

Three OCP settings ensure that the rings can be harmionized with your individual style of pedalling and your position on your bike.

Chainring options available: 40-27t & 42-28t.

Only in black. Weight: 96g (40-27t) & 108g (42-28t)

Proven effective by the Specialized Factory XC Team.