Carefully machined from 6Al-4V "Grade 5" titanium and featuring a novel split lattice design, these crank arms have an incredible strength-to-weight ratio. Each crank arm weighs just 219g/7.7oz. Although there are lighter crank arms on the market, fatigue and impact testing at ACT Labs in Long Beach, CA showed that these crank arms in particular remain durable even as titanium spindles and standard BMX pedals begin to fail. What this means is that after repeated abuse, you'll more likely need to replace your spindle, bottom bracket bearing, and/or pedal long before you'll need to replace one of these crankarms. You can read all about the initial development of these cranks on our blog, and watch a mashup video of crank testing on our youtube. 

Please allow up to 3 months for delivery. We manufacture these in small batches according to the volume of pre-orders we receive each month, and orders are delivered in the sequence they were placed. When you order, you will receive a link to track updates about each step in the progress of your order through raw material purchase, machining, polishing, quality control, and shipping.

Material: 6Al-4V "Grade 5" titanium
Spindle: 22mm 48 spline
Spindle widths: 143 (BMX) or 160mm (MTB)
Bolts: M17x1.25, 10mm hex
Drive: Spline-drive only (compatible with all 22mm/48 splined sprockets)
Weights:
582g = 170mm arms, bolts, and 143mm spindle
600g = 170mm arms, bolts, and 160mm spindle