Shimano Ultegra FC-R8100 chainrings are constructed with high quality aluminum and are compatible with FC-R8100 and FC-8100-P 2x 12-speed cranksets.

• Asymmetric 110 BCD
• Compatible with HG 12-speed chains
• Aluminum with anodized finish and carbon fiber reinforced plastic for extreme durability and light weight
• Hollowglide technology provides high rigidity and cuts down on weight while maintaining strength
• Offers better power transfer and quicker, more precise front shifting
• 52t outer chainring is for use with 36t inner chainring