absoluteBLACK Oval 76 BCD Chainring for Rotor - 30t 76 BCD 4-Bolt Narrow-Wide Black. absoluteBLACK Oval 76 BCD Chainrings are designed for Rotor REX cranksets with their original 1x spider. Lighter and more stiff than original chainrings these provide a super smooth pedaling sensation. The specially designed narrow-wide tooth profile keeps the chain snug allowing you to leave your chain keeper in the garage. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size ranging from 10.2 - 14.4% with timing of 110.5-116.3° after TDC (top dead center).

Only compatible with Rotor Rex cranks

Oval shape reduces stress on knees helps to keep your legs fresh and does not feel any different while riding

The unique patent-pending narrow-wide tooth profile keeps the chain in place

Teeth have been 3D-machined for ultimate mud shedding and quieter operation

Provides excellent weight to strength ratio