The new Shimano 2x11s-specific CUES Rear RD-U6040 rear derailleur is significantly more compact than standard CUES models with a streamlined Shadow RD design that's tailored for road all-road and gravel bikes. It achieves a weight reduction of 100 grams-delivering lighter and sleeker performance for riders.Features Shadow RD that's intended for more aggressive ridingThe super low profile design with single tension construction to ensure the derailleur does not hit the chain stay in rough riding conditions - resulting in smooth and silent performanceOffers a lighter and sleeker performance for ridersProvides a wider gear range capacityCompatible with CUES CS-RS400 11-speed cassette (sold separately)Compatible with LINKGLIDE and HG 11-speed chains (sold separately)