Shimano GRX RX820 Unstoppable review (bike radar). GRX RX820 is lighter at 2,822g to the 3,148g of Apex Eagle, so if you’re looking to create a lightweight gravel bike, GRX would be the way to go. The vast majority of riders will get their GRX RX820 on a fully built bike, negating any installation worries.

Brand: Shimano
Compatible Bike Type: Gravel Bike
Shifter Style: Hydraulic
Country/Region of Manufacture: Japan
Number of Speeds: 12 Speed
Part Type: Right Shifter