Friction Losses of new chains range from 7 watts to over 10 watts. Friction Facts optimizes 10sp Dura Ace chains to achieve losses of 5 watts or less, guaranteed with test documentation! Shimano DA 10sp UltraFast Chains have an efficiency rating of 98% or better.
The chain is included in the price. Flat rate shipping of $5 within US. $20 per chain international.