Slim ergonomically designed Tiagra Dual Control Levers for hydraulic disc brakes offer powerful braking and effortless 10-speed shifting.

The Shimano Tiagra R4725 Dual Control Levers bring the all condition confidence of hydraulic disc brakes and refined ergonomics to the quick and intuitive shifting cyclists expect from Shimano Tiagra - built for smaller hands.

The all-new Shimano Tiagra BR-4770 hydraulic disc brake caliper offers greater rider control in all conditions. With convenient One Way Bleeding and easy hose joint system, installation and adjustment are kept simple.

Technology

Reach Adjust

Brake lever is equipped with a reach adjust mechanism. The distance from handlebar grip to lever can be adjusted to suit any hand size, type of riding and individual rider preferences.

Ice Technologies

The fade, which can occur to disc brake rotor and pad when braking on a long downhill ride for instance, has a negative impact on the braking performance. Shimano has adopted Ice Technologies disc brake rotor and Ice Technologies pad to realize the cooling technology for consistent performance. The clad disc brake rotor blade, which has a 3 layer-sandwich structure of stainless steel, aluminum and stainless steel, provides better radiation performance. Also, the radiation fin has been adopted for the pad. Moreover, the clad disc brake rotor blade and the radiator fin provide long pad life, less noise, less fade and lightweight.

Ice Technologies piston in order to achieve optimized lightweight, high rigidity and heat dissipation. Oversized pistons transfer hydraulic power directly to the brake pad, and ceramic material is used to avoid heat transfer for constant stable braking, providing efficient stopping power transfer without loss.

One Way Bleeding

“One Way Bleeding” was developed for quick and easy prevention of air in our hydraulic system. We have streamlined the oil route throughout the system to prevent air bubbles from being captured in the system.

One way oil routing plus a funnel tool with mineral oil provides an easy and clean bleeding system.

Features

• Ergonomic short shift arc follows natural hand movement with inward shift stroke distance reduced for rapid and precise gear changes
• Hydraulic brake lever provides powerful, controllable and consistent stopping power with less effort especially from the hood position
• Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear
• Smaller lever size and new positioning improves ergonomics
• Kit includes ST-4725 STI, BR-4770 flat mount brake caliper with pads, hose, and gear cable (without rotor or adapter)
• Tuneable reach adjusters
• Easy bleed and clean hydraulic system, for use with Shimano mineral oil only