The Shimano CUES RD-U4020 LINKGLIDE 2x9-speed rear derailleur, equipped with SHADOW RD technology, delivers smooth and reliable shifting performance. This versatile component ensures seamless gear transitions and efficient pedaling for uninterrupted trail enjoyment. Its flat design and chain stabilization provide extra safety even on rough terrain. Key Features Ultimate Durability : The LINKGLIDE RD-U4020 offers smoother, more consistent pedaling with nearly imperceptible shifts. The optimized shifting gate design ensures a smoother transition between cogs, minimizing the jumps that can affect shifting and pedaling smoothness. This is particularly beneficial during outward shifts, where larger forces make pedaling shock more noticeable. Enhanced Drivetrain Longevity : Ideal for high-torque e-bikes and daily riders, LINKGLIDE's redesigned cassette teeth feature a substantially thicker base and a unique chamfer that significantly improves wear resistance. This enhances cassette durability, prolonging smooth driving performance and delaying chain skips caused by wear. Detailed Specifications Stable Performance : Optimized for trails, gravel, and city streets. Low-Profile Design : Protects the derailleur from obstacles in various riding conditions. Total Capacity : 41T. Max Low Sprocket : 36T (2x9-speed). E-Bike Rated : Designed and tested for enduring e-bike performance. Compatibility : Only compatible with LINKGLIDE shifting system. Product Features Use : MTB, Trekking, E-Bike Group : CUES U4000 Model : RD-U4020 Mount : Direct attachment (Conventional) Technology : Shadow RD Gradations : SGS-Type 2x9-speed Compatible Chain : LINKGLIDE, HG 11-speed Max Teeth Large Sprocket : 36T Min Teeth Large Sprocket : 36T Max Teeth Small Sprocket : 11T Min Teeth Small Sprocket : 11T Max Front Difference : 16T Total Capacity : 41T Pulley Cage : Type-SGS long Material and Color Materials : Aluminum, Stainless Steel, Steel, PA-GF Color : Series Color Technologies LINKGLIDE : Delivers seamless shifting and pedaling performance, built to withstand persistent daily wear. It supports stress-free riding and ownership experiences for evolving bike types and riding styles. LINKGLIDE's robust cassette design shifts up and down gears seamlessly while significantly reducing drivetrain wear, making it the ultimate utility drivetrain for long-lasting performance. SHIMANO STEPS : This system, standing for SHIMANO Total Electric Power System, integrates perfectly into e-bikes, ensuring comfortable and natural handling with well-balanced power development. It combines the experience of nature and healthy exercise with exceptionally smooth engine support. SHIMANO SHADOW RD : Designed for more aggressive riding, this mechanism features a super low profile design. The single tension construction prevents the derailleur from hitting the chainstay in rough conditions, resulting in smooth and silent performance. The Shimano CUES RD-U4020 9-speed rear derailleur is the ultimate choice for riders seeking reliable, long-lasting performance. Its robust design and advanced technology ensure that it meets the demands of both e-bikes and traditional bikes, making it a versatile and valuable addition to any cyclist's gear.