SRAM Red 1 AXS DM Crankset Speed: 12 Spindle: 28.99mm BCD: Direct Mount 46 DUB 172.5mm Black RoadSRAM RED 1 AXS Crankset 172. 5mm 12 Speed 46t 8 Bolt Direct Mount DUB Spindle Interface Natural Carbon D1. The SRAM RED 1 AXS crankset features exceptional 1x drivetrain design. It provides the simplicity and tighter gearing range that is well suited for road racing and riding in flatter terrain where a wide range would go unused. The crankset is designed specifically for electronic shifting and can be upgraded to a power meter. Single ring drivetrain