SRAM XX1 Eagle DUB Crankset Speed: 11/12 Spindle: 28.99mm BCD: Direct Mount 32 DUB 175mm Grey 55mmDUB technology delivers the lightest, stiffest, strongest crankset available All new SRAM CARBON TUNED crank technology provides extreme stiffness and light weight X SYNC2 chainring provides significantly quieter performance, with better mud clearing and extraordinary durability SRAM Model ID: FC XX 1 C2 TECH SPECS BCD Direct Mount SRAM 3 Bolt BB Inclusion No Chainline 55mm Teeth 32 Crank Spindle Diameter 28. 99mm Crank Arm Length 175mm Interface DUB