Shimano GRX FC-RX820-1 Chainring Description: The Shimano GRX FC-RX820-1 Chainring is designed for use with the FC-RX820-1 GRX 1 x 12 crankset. Features: Alloy construction minimizes weight, yet remains stiff Designed to meet the needs of gravel cyclists who want to lower gearing Narrow-wide teeth technology retains chain tension over rough terrain Specifications: Chainring Shape: Round Drive Type: 1x Speed Compatibility: 12 Speed Chainring BCD: 110mm Shimano Asymmetric Mount: 4-Bolt Material: Alloy Color: Black Weight: -