Shimano 105 R7100 12S Disc group
Shimano 105 12-Speed Mechanical Groupset
Elevate your performance with SHIMANO 105
SHIMANO 105 is a mid-range road groupset that inherits racing technologies and design to deliver a unique balance of performance, reliability, and affordability. With its updated interface and 12-speed mechanical shifting, Shimano 105 brings a fresh level of precision and control to road cycling.
Optimised Grip & Comfort
The redesigned Dual-Control levers provide:
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Ergonomic shape for a wide range of hand sizes
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Reduced distance between hood and lever
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Improved control with less effort
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More efficient braking and shifting performance
Built for Every Rider
A drivetrain designed for versatility and real-world riding:
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Sub 1:1 gear ratio for steep climbs
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Smooth and controlled effort management
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Wide gearing range for different riding styles
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Confident performance on varied terrain
Advanced Braking Performance
Smooth, powerful, and reliable braking
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New piston design for improved braking efficiency
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Increased pad clearance (10%) reduces rotor rub
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Consistent modulation and control
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Low-maintenance hydraulic system
Key Components & Features
Crankset — FC-R7100
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HOLLOWTECH II construction
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Excellent balance of stiffness, weight, and efficiency
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Q-factor: 148 mm
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Speed: 2x12
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Chainline: 44.5 mm
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Compatible bottom brackets: SM-BBR60 / SM-BB72-41B
Cassette (12-Speed)
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Progressive gear ratios for smooth cadence
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Optimised for acceleration and efficiency
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Compatible with 12-speed drivetrains and 11-speed road hubs
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Aluminium spider + steel sprockets
Shifters & Brakes — ST-R7120 + BR-R7170
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Mechanical 12-speed Dual Control levers
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Improved ergonomics and reach
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Adjustable lever travel
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Hydraulic disc brakes with Shimano mineral oil
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Compatible with ICE TECHNOLOGIES pads
Front Derailleur — FD-R7100
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Smooth, low-effort shifting
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Easy and precise adjustment
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Integrated cable tension adjustment
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Max chainring: 50–52T
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Total capacity: 16T
Rear Derailleur — RD-R7100
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SHIMANO SHADOW RD design
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Stable and precise shifting
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Wide gear compatibility (up to 36T cassette)
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Total capacity: 41T
Chain — CN-M7100
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Designed for 12-speed systems
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Improved chain retention and engagement
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Durable and efficient performance
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Non-reusable quick link