Short Description
The Shimano BR-R451 Dual-Pivot Brake Caliper delivers smooth, dependable rim-braking performance for road, touring and commuter bikes requiring a longer-reach caliper. Its lightweight aluminium construction, Super SLR design and adjustable brake shoes provide responsive braking, accurate pad alignment and reliable everyday control.

Key Features

• Dual-Pivot Design: Provides responsive and consistent braking with improved power and control
• 57 mm Reach: Longer-reach design offers increased clearance for compatible frames, forks and tyres
• Shimano Super SLR: Friction-reducing technology delivers light lever action and accurate brake modulation
• Adjustable Brake Shoes: Toe-in adjustment allows accurate pad alignment for effective and quieter braking
• Quick-Release Mechanism: Opens the caliper wider to make wheel removal and installation easier
• Lightweight Aluminium Construction: Durable aluminium brake arms feature a tough anodised finish

Product Overview
The Shimano BR-R451 Dual-Pivot Brake Caliper is a practical choice for road, touring and commuter bikes that require more clearance than a standard short-reach road brake. Its 57 mm reach provides clearance for compatible wider tyres and mudguard-equipped setups, while the dual-pivot construction delivers a firm and responsive braking feel. Shimano’s Super SLR system helps reduce friction throughout the braking action, improving lever response, modulation and control. Adjustable toe-in brake shoes allow the pads to be correctly aligned with the rim, while the built-in quick release makes wheel removal faster and easier. Constructed from lightweight aluminium with a durable anodised finish, the BR-R451 offers dependable braking performance for upgrades, replacements and custom bike builds.

Specifications

• Brand: Shimano
• Model: BR-R451
• Product Type: Road bike rim-brake caliper
• Brake Type: Dual-pivot side-pull caliper
• Brake System: Shimano Super SLR
• Reach: Up to 57 mm
• Maximum Tyre Size: Up to approximately 32 mm, subject to frame and rim compatibility
• Material: Aluminium
• Brake Shoes: Shimano R50T2
• Brake-Shoe Adjustment: Adjustable toe-in
• Quick Release: Yes
• Mounting Type: Recessed-nut mounting
• Compatibility: Compatible road, touring and commuter bikes using caliper rim brakes
• Position: Front or rear, depending on selected variant
• Colour: Black
• Manufacturer Codes: BRR451FL / BRR451RL, depending on variant

Ideal For

• Road bikes requiring a longer-reach brake caliper
• Touring and commuter bike builds
• Bikes using tyres up to approximately 32 mm
• Replacing or upgrading a compatible rim-brake caliper
• Riders seeking dependable Shimano braking performance

What’s Included

• 1 × Shimano BR-R451 Dual-Pivot Brake Caliper
• 1 × Pair of fitted brake shoes
• Recessed mounting nut or nuts appropriate to the selected variant

Care & Notes
Confirm the required brake reach, mounting type and front or rear fitment before ordering. Compatibility with tyre width depends on the bicycle frame, fork, rim and mudguard clearance. Brake installation and adjustment should be completed by a competent bicycle mechanic. Inspect the brake pads regularly and replace them when worn or contaminated. Keep braking surfaces clean and free from oil, grease and cleaning products.

Why Buy From LK Bikes
LK Bikes offers dependable cycling components from trusted brands, supported by expert advice, reliable service and strong aftersales support.