525 size
D.I.D. Chain is the #1 chain manufacturer in the world and used by many factory racing teams. Wunderlich only uses D.I.D. chains on all race and custom bikes. With D.I.D. you can ride in confidence knowing that you have the finest chain available.
D.I.D X-RING® is superior to other types of o-ring designs. The X-Ring results in less 50% less power loss due to friction. The X-Ring's four contact points greatly increased sealing performance. This keeps the dirt out and the lubrication in much better than any other O-Ring.
Some facts:
**To install this chain, you will need a chain riveting tool. If you prefer to use a clip type master link, you can order one in addition. Please see the Related Products tab above for these items.