Phil Wood & Co. cranks and chain rings are machined out of solid, US-produced 7075 billet aluminum. The 7075 we use is put through special processes that maximize hardness and minimize internal material stresses. Each crank set is machined in-house to the same high quality standards we apply to all of our products. Our cranks are available in the same high polished silver and black finishes*. Track crank arms are currently available in 165 and 170mm lengths. Track chain rings are currently available in 46 and 48 tooth counts for 1/8” chain.