XX1 Eagle DUBDUB 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 Attributes BB Inclusion No BCD Direct Mount SRAM 3 Bolt Crank Spindle Diameter 28. 99mm Crankset Material Carbon Crankset Weight 422g Interface DUB