Designed by our French Engineers Nova Carbon Ceramic rear derailleur improves the fluidity of your transmission, enhance efficiency to satisfy the most demanding. Made in very high-end materials: an ultra-light carbon fiber and full ceramic sealed bearings. Two Oversized aluminum wheels, which coupled with full ceramic sealed bearings decrease the chain winding angle with minimal friction and optimize your gear change.

In this version, Nova Carbon Ceramic Derailleur Shimano Road 12S cage is only compatible with :

– Shimano Ultegra R8100-8150 Series

– Shimano Dura-Ace R9200-9250 Series

– Not compatible with Shimano 11-speed version.

We recommend a maximum 34T cassette for optimum gear change. 12S Version is compatible with Shimano electric (Di2) 12-speed Ultegra / Dura-Ace derailleurs. Despite visual similarities, the Shimano 105 and the Shimano Ultegra / Dura-Ace 11S versions are not compatible with the Shimano Ultegra / Dura-Ace 12S versions and vice versa. No set of rules can be made for how often your part have to be maintained. Our sealed bearings protected with alloy covers enable a longer lifespan. We designed these parts in a way that you will not have to worry about maintenance or technical issues. No lubricants or grease are required to put on the bearings. During your rides, dirt may get between the cover and the bearings, you can remove it with water or a degreaser. Fully ceramic sealed bearings so indeed there is no risk of oxidation. Please note, they are dry bearings so do not use lubricant.