SRAM RED 1x XPLR Wide Crank Arm Assembly - 150mm 13-Speed 8-Bolt Direct Mount DUB Spindle Natural Carbon E129 g lighter than previous generation 8 bolt interface compatible with power and non power AXS spiders and integrated chainrings DUB Wide bottom bracket adds durability and simplicity SRAM Model ID: FC RED ASSY E1 TECH SPECS BCD Direct Mount SRAM 8 Bolt Crank Arm Length 150mm Interface DUB Primary Color Black