Shimano GRX ST-RX820 Shift/Brake Levers Enhanced Comfort and Control on Mixed Terrain If you're looking to upgrade your current drivetrain or you're building up a fresh gravel ride, then you'll want an excellent pair of shifters. The Shimano GRX ST-RX820 Shift/Brake Levers provide unmatched control and comfort for mixed-terrain riding. It features an anti-slip coating on the brake lever, flared handlebars optimization, and a textured surface on the hood for better control. Features Textured surface on the hood helps provide better grip Anti-slip coating on the brake lever that works in wet or muddy conditions Hood shape optimized for flared handlebars Designed for 12-speed drivetrains Average weight: 289g Clamp band: 23. 8 - 24. 2mm | Shimano | Grx St-Rx820 Shift/brake Levers St-Rx820(L) Rx820(F) | Aluminum