Due to its unique optimisation treatment, CeramicSpeed's Ultrafast Racing Chain saves you watts and improves your performance with free speed and unparalleled low friction. Our ultrafast racing chains are carefully selected from high quality suppliers and optimised by hand in Denmark. This ultrafast chain has been optimised for Shimano 12-speed compatibility, to boost the efficiency of your entire drivetrain.   CeramicSpeed UFO Racing Chains can save you between 2-5 watts on a distance of 650 km/400 miles. Apply CeramicSpeed UFO Drip after 650km to maintain your peak chain optimization over the life of the chain.   Be aware that the UFO treatment is not optimised for wet and muddy conditions, which might cause corrosion on the chain. Read more about this in the maintenance tab.   In The Box 116 link Optimized Chain.. Shimano 12-speed Quick Link.. Sticker Sheet.. Single-use UFO Drip All Conditions Sample..