Description

Shimano RD-M8100 XT 12-Speed Rear Derailleur – SGS Long Cage (1×12-Speed, Max 51T)

The Shimano RD-M8100 XT 12-speed rear derailleur is engineered for fast, precise, and reliable shifting on all MTB trails. Featuring Shadow Plus technology and an SGS long cage, this derailleur ensures stable chain retention, smooth gear changes, and quiet operation, even over rough terrain. Optimized for 12-speed 1x drivetrains, it combines durability, performance, and lightweight design for aggressive mountain biking.

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Key Features

• Shadow Plus Technology – reduces chain bounce for stable drive and consistent shifting

• Super Low Profile Design – optimized slant angle for light, precise shifting

• Single Tension Spring – prevents contact with the chainstay, ensuring silent operation

• Rubber Bumper on Pulley Cage – further minimizes drivetrain noise

• 13T Sealed Bearing Pulleys – low-friction, long-lasting pulleys for smoother shifting

• Direct Cable Routing – prevents cable snagging on trail obstacles

• Cold Forged Alloy Links & Pivot Body – ensures strength and durability

• Four Fluorine-Coated Link Pin Bushings – smooth, reliable motion

• Strong Return Spring – positive shifting feel under all conditions

• Top Normal Spring – spring selects higher gears automatically

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Specifications

• Speed: 12-speed

• Max Low Sprocket: 51T

• Capacity: 41T (SGS long cage)

• Average Weight: 284 g

• Colour: Black

• Di2 Compatible: No

• Discipline: MTB

• Pulley Cage: SGS Long

• Compatibility: Shimano 12-speed 1x drivetrains

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Why Choose the Shimano RD-M8100 XT Rear Derailleur?

The RD-M8100 XT is built for high-performance MTB riders tackling technical trails, enduro courses, or cross-country routes. Its Shadow Plus chain stabilizer keeps the chain in place over rough terrain, while lightweight alloy construction and low-friction pulleys ensure smooth and quiet shifting. Paired with a 12-speed XT drivetrain, it delivers reliable, precise gear changes every ride.

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Compatibility & Application

• Designed for 12-speed 1x Shimano XT MTB drivetrains

• Maximum sprocket: 51T, SGS long cage for wide gear range

• Suitable for mountain bikes, enduro, and XC riding

⚠️ Ensure compatibility with Shimano 12-speed XT drivetrains before purchase.

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Why Choose Hopkinson Cycles?

At Hopkinson Cycles, we supply genuine Shimano components with expert advice and reliable service:

• 🚚 Free UK delivery on all orders

• 👨‍👩‍👦 Family-run business with decades of cycling experience

• 📞 Direct customer support – speak to knowledgeable staff

• 🏪 Independent bike shop – trusted by thousands of riders

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📍 Address: Queen Street, Horbury, Wakefield, WF4 6LP
📞 Tel: 01924 274209
✉️ Email: info@hopkinsoncycles.com
💻 Website: www.hopkinsoncycles.com