The eeWings All-Road titanium cranks and the included CNC aluminum bottom bracket preloader are the ultimate in stiffness and durability while weighing in at less than 400 grams – in the same weight range as premium carbon cranks but 20% to 30% stiffer. Weight : 395 grams Materials : Butted 3/2.5 titanium arms with CNC 6/4 titanium spindle, and hirth joint. Stainless Steel crank bolt Arm Length : 170mm Preload Adjustment : Cane Creek CNC Machined 7075 T-6 Aluminum BB Compatibility : 30mm spindle only. BSA68mm, PF86, T47, BB30, PF30, 386EVO Q-Factor : 160mm Chainring Interface : Compatible with SRAM 3-Bolt Direct Mount Chainring Interface Finish : Brushed Titanium, Laser Etched Graphics / Painted deep black with a premium automotive-style paint, affixed with a water-transfer decal “W” logo, and then clear coated with a high-gloss protective finish. Note: The paint on the eeWings Raven can be expected to chip, scratch, and wear over time with use.