Shimano CUES SHADOW RD Rear Derailleur RD-U4020 9-speed

Shimano RD-U4020 CUES rear derailleur for 2×9-speed – For MTB, touring and city bikes with and without motor

The Shimano CUES RD-U4020 rear derailleur is suitable for city, touring and mountain bikes with 2×9-speed Linkglide drivetrain and, unlike the RD-U3020, is also approved for e-bikes. It features a flat construction, the so-called Shadow Design, which reduces the risk of collision with obstacles. Its smooth, reliable function promotes comfortable everyday biking. The rear derailleur has a total capacity of 41 teeth and is only compatible with 2x gears and 36 teeth on the largest cassette sprocket. It is made of steel and a polyamide-glass fibre composite.

Guidelines for Replacing E-bike Components:

Specifications:

Series: CUES U4000
Model: RD-U4020

Application: City, Touring, All Mountain

Gearing: 9-speed

Mount: standard

Capacity: 41-tooth

Compatibility: Shimano MTB 9-speed (Linkglide)

Compatibility – Chains: HG 11-speed, Linkglide CN-LG500

Technical Information:

Derailleur Pulleys: 11-tooth

Outer Cage Material: steel

Inner Cage Material: steel

Other Materials: Polyamide / glass fibre, steel, stainless steel, aluminium

Compatibility:

Shifter: SL-U4000-9R, SL-U4010-9R

Cassette (11-36 T): CS-LG400-9, CS-LG300-9

Chain: CN-LG500, CN-HG601-11, CN-HG701-11, CN-HG901-11

Features:

• rear derailleur for city, touring and mountain bikes with Shimano Linkglide drivetrain (2×9-speed only)
• smooth and defined shifting for comfortable, safe pedaling
• flat design prevents getting stuck on obstacles
• reliability and stable performance for everyday and leisure use
• designed and tested for long-lasting performance also on e-bikes (E-Bike Rated)
• a fluorine-coated joint bushing
• painted cage

Technology:

Shadow RD
Shadow rear derailleurs from Shimano have a very flat profile, allowing for a more aggressive riding style by minimizing the risk of getting stuck on obstacles. In addition, the single preload ensures that the rear derailleur does not hit the chain stay even on very uneven ground. All of this contributes to a quiet, clean-operating gearshift.

Models:

long:

Cage Length: SGS Max.

Largest Sprocket Teeth: 36-tooth Min.

Largest Sprocket Teeth: 36-tooth Max.

Smallest Sprocket Teeth: 11-tooth Min.

Smallest Sprocket Teeth: 11-tooth Max.

Chainring Difference: 16-tooth

Total Capacity: 41-tooth

Manufacturer Number: ERDU4020SGS

Contents:

• 1 x Shimano CUES RD-U4020 Shadow rear derailleur