5Dev Titanium Cranks. Features: CNC'd fromsolid bar stock titanium Low profile crank arm reduces pedal strike during technical climbs Compatible with SRAM 8-bolt direct mount chainring interface Q Factor: 168mm for 52mm Boost (177mm for Super Boost+) Weight: 553g (29mm spindle) Specs: Model:Titanium Boost crank Length:165mm Direct Mount BCD:8-bolt Configuration:1x Spindle Interface:30mm (73mm BB) Chainline:52mm Material:titanium Color:silver