Fits the following cranksets: BCD 110mm 4 arms.

Compatible with the following chains and derailleurs: Shimano Dura Ace FC-9100, Ultegra FC-8000 or SRM Origin 9100 cranksets and Shimano, SRAM and Campagnolo 11 speed groups.

Chainring made of AL7075-T6 aluminum alloy, structural carbon fiber with glossy 3K finish, and Grade 5 Titanium pins. Outer chainring with 53 teeth and a bolt circle diameter (BCD) of 110 mm with 4 arms. Compatible with Shimano Dura Ace FC-9100, Ultegra FC-8000, or SRM Origin 9100 cranksets, as well as Shimano, SRAM, and Campagnolo 11-12 speed drivetrains. Requires installation alongside the X-CarboRing 39 x 110 inner chainring (4 arms). 100% made in Italy.