About Mavic Cosmic Carbone Ultimate Wheelset: Limited Time Special Offer: Buy any Mavic, Zipp or Ritchey WCS Carbon Wheelset and get a Dura-Ace 10-speed chain FREE. Here's how it works: Add any Zipp, Ritchey WCS Carbon wheelset or select Mavic wheelsto your cart. Next, add a Dura-Ace chain (item code CMR-CHA-CN7801) to your cart. Use Coupon Code FRDAC when you check out, and the cost of the chain will be deducted from your total. Note to Campy and SRAM fans: you may substitute another chain. Call for a credit equal to the cost of a Dura-Ace chain ($35.99) towards your purchase.