Helix E*Spec Direct Mount Chainring multi-speed freewheels The Chamonix earned the highest

The Chamonix earned the highest 5-Star Virginia Tech® Helmet Rating from the internationally renowned Virginia Polytechnic Institute and State University

Download the manual below for further installation and compatibility

High durability for all-day performance

and Torx 10

Low-cut collar for reduced irritation

Helix E*Spec Direct Mount Chainring multi-speed freewheels The Chamonix earned the highestHelix Core e*spec Direct Mount Chainrings feature a narrow wide tooth profile, for reliable chain retention and an extra long wear life. Helix Core e*spec rings are cold formed from steel and then heat treated to provide excellent durability and toughness, all at a price that's easy on your wallet.