Boundary cranks are the latest development from Kris Holm to produce the highest possible strength to weight ratio and pedal performance in a unicycle crank.
Constructed from tough, stiff 7050 alloy for all types of riding, Boundary Cranks us..Price: $120.00 ![](https://cdn11.bigcommerce.com/r-b894c2cb799bac74ce4990fade5989902a6e1a9d/themes/ClassicNext/images/IcoRating0.gif)