The best track chain available. Period. The Izumi Model V is constructed with brass outer plates mated to hardened steel inner plates with bushings between the links. This extremely long wearing chain is super quiet and smooth offering the ultimate in chain flow. Mate this chain with a EAI Gold Medal or Superstar cog and high quality chainring like a Dura-Ace or Sugino Zen for absolute perfection on the track. 1/8" pitch only.