Cranks live a hard life.....Especially if they're mounted on a cargo bike and ridden by a former BMX'er who happens to be a clydesdale.
Here's what these poor cranks look like after about 9,000 miles. The shape actually created a stress riser at the source of the crack. As much as I want to glorify my thunderous/crank arm murdering thighs, these cranks really just committed suicide.....So I must stay humble. Guess this is why these have been off the market for years.
Clean yo' bike every now and then to find these ticking time bombs. My friend Todd had a BMX crankarm break while he was powering down the street and it absolutely messed him up. Scratched up face and broken teeth. I got lucky with these