5Dev R-Spec Trail Enduro Cranks. Features: An evolution of the original, now exceeding the ISO Race standard Low profile crank arm reduces pedal strike during technical climbs Compatible with SRAM 3-bolt direct mount chainring interface Q Factor: 167mm for 52mm Boost (176mm for Super Boost+) Now features a matte finish 5 year warranty Weight: 610g (165mm length with 29mm spindle) Specs: Model:R-Spec Trail/Enduro Length:160mm Direct Mount BCD:3-bolt Configuration:1x Spindle Interface:30mm (73mm) Chainline:52mm Material:aluminum Color:black