5Dev Titanium Shimano eCranks. Features: CNC'd on a 5 Axis CNC machine from solid bar stock Titanium. Designed and manufactured in San Diego, California Low profile crank arm reduces pedal strike during technical punchy climbs, allowing you to clean more sections of trail and get back up to take another lap with less effort Q Factor: 182mm when installed on Shimano EP8 Weight: 440g Please have cranks installed by an experienced E-Bike mechanic. M6X1.0 bolts need to be tightened to 14Nm. Add blue Loctite to each bolt and end cap. Check bolts after your first ride to make sure they are at the proper spec Specs: Model:Titanium EP8 eCrank Length:157.5mm Spindle Interface:EP8 Q Factor:182mm Material:titanium Color:raw/silver