Description

Shimano RD-M9100 XTR 12-Speed Rear Derailleur – SGS Long Cage (10–51T, 1×12-Speed)

The Shimano RD-M9100 XTR 12-speed rear derailleur delivers unmatched shifting performance and durability for serious MTB riders. Designed specifically for XTR M9100 12-speed 1x drivetrains, this SGS long cage derailleur features Shimano’s Shadow Plus technology, optimized slant angles, and lightweight construction to ensure smooth, precise, and quiet gear changes on the roughest trails.

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Key Features

• Shadow Plus Technology – reduces chain bounce in rough terrain for stable drive and smoother shifts

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

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

• Rubber Bumper on Pulley Cage – minimizes noise during riding

• 13T Bearing Pulleys – durable, low-friction design reduces drivetrain resistance

• Direct Cable Routing – prevents cable snagging on trail-side obstacles

• Full Carbon Fibre Outer Cage – saves weight

• Alloy Inner Cage – increases rigidity and strength

• Cold Forged Wide Alloy Links & Pivot Body – maximizes durability

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

• Strong Return Spring – delivers positive shifting feel under all conditions

• Top Normal Spring – allows spring to select higher gears automatically

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Specifications

• Speed: 12-speed

• Max Low Sprocket: 51T

• Capacity: 41T (SGS long cage)

• Average Weight: 240 g

• Colour: Black/Grey

• Di2 Compatible: No

• Discipline: MTB

• Pulley Cage: SGS Long

• Compatibility: XTR M9100 12-speed 1x drivetrains

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Why Choose the Shimano RD-M9100 XTR Rear Derailleur?

Built for high-performance mountain biking, the RD-M9100 XTR rear derailleur is perfect for riders tackling technical trails, enduro, and cross-country courses. Its low-profile Shadow Plus design keeps your chain stable over rough terrain, while the lightweight carbon and alloy construction reduces weight without compromising durability. Paired with an XTR drivetrain, it ensures smooth, precise, and reliable shifting every ride.

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Compatibility & Application

• Designed for 1×12-speed XTR MTB drivetrains

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

• Suitable for mountain bikes, enduro, and XC riding

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

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Why Choose Hopkinson Cycles?

At Hopkinson Cycles, we provide genuine Shimano components backed by 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