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Shimano GRX ST-RX400/BR-RX400 Hydraulic Disc Brake Set

IRX400DLF6SC100A
₹19,340
Type

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In the Box

1x Shimano GRX ST-RX400/BR-RX400 Disc Brake Set (Left/Front or Right/Rear)
1x Shimano SM-BH90-JK-SSR Brake Hose, 1000 mm (Front) or SM-BH90-JK-SSR 1700 mm (Rear)
1x Pair Shimano Resin Brake Pads with Cooling Fins
1x Disc Brake Adapter for Front 140/160 + 160/180 mm
1x Hose Connection Set w/ Olives and Pins
2x Type A Caliper Bolts (Front)
2x Caliper Bolts for 25 mm Frame (Rear)
1x Shifter Cable 1800 mm (Front) or 2200 mm (Rear)
1x Cable Housing 600 mm (Front) or 600/300 mm (Rear)

Smooth Shifting and Reliable Braking for Gravel Adventures

Overview

The Shimano GRX ST-RX400 Dual Control Lever provides light, precise shifting performance tailored for mixed-terrain riding. Its design offers intuitive gear changes, ensuring smooth operation on any adventure, from gravel trails to challenging climbs.

Ergonomic and Anti-Slip Design: Designed for comfort and control, the shifter features an ergonomic layout that minimizes hand fatigue during long rides. The textured, anti-slip brake lever enhances grip, providing confidence and control even on rough or wet surfaces.

Low-Profile Flat Mount Caliper: The Shimano GRX BR-RX400 hydraulic disc brake caliper integrates seamlessly with modern gravel bikes using a sleek Flat Mount design. Its compact build and optimized positioning improve bike aesthetics and braking efficiency.

Advanced Heat Dissipation Technology: With Shimano’s Ice Technologies, the brake caliper efficiently dissipates heat during extended braking sessions, ensuring consistent performance and reducing the risk of fade on long descents or intense rides.

Engineered for gravel and adventure cycling, this brake set excels in delivering powerful, reliable stopping power and smooth shifting. Its durable construction ensures peak performance across varied terrain, offering riders the freedom to explore confidently.

Features

ST-RX400

  • Enhanced Terrain Control: Provides greater control for mixed-terrain rides with gravel-inspired lever and bracket ergonomics.
  • Anti-Slip Design: Brake lever with anti-slip texture ensures a secure grip in all conditions.
  • Smooth Shifting Performance: Features the same light and responsive shifting operation as Shimano’s top-tier road systems.

BR-RX400

  • Exceptional Braking on Rough Surfaces: Offers consistent and reliable braking performance with excellent heat dissipation.
  • Flat Mount Design: Provides a compact and sleek setup, ideal for modern gravel and road bikes.
  • User-Friendly Setup and Maintenance: Features convenient tool access and an easy hose joint system (J-kit) for streamlined installation.
  • Simplified Wheel Replacement: Designed for hassle-free wheel changes, ensuring smooth transitions during rides.
  • Efficient Bleeding System: The clean and straightforward hydraulic bleeding system simplifies maintenance.

Technologies

ST-RX400:

  • Reach Adjust: Customizable brake lever reach to fit any hand size or riding style for optimal comfort and control.
  • Dual Control Lever: Combines braking and shifting functions in one system, offering smooth and effortless operation inspired by MTB technology.

BR-RX400:

  • Ice Technologies: Reduces heat buildup with advanced rotors and pads, ensuring consistent braking, quieter rides, and extended pad life for confidence in demanding conditions.
  • One Way Bleeding: Streamlined oil routing prevents air bubbles, allowing for quick and clean hydraulic maintenance using mineral oil and a funnel tool.

Specifications

ST-RX400:

  • Model No: Left: ST-RX400-L, Right: ST-RX400-R
  • Series: GRX
  • Color: Series Color
  • Bracket Cover Color: Standard
  • Shifter Type: Dual Control Lever
  • Shift Lever|Front Speeds: Left: 2
  • Shift Lever|Rear Speeds: Right: 10
  • Max. Multiple Shifts (Main Lever/Rear): 2
  • Shift Lever Cable|Outer Casing|Lever Side: OT-SP41
  • Shift Lever Cable|Outer Casing|Rear Derailleur Side: OT-RS900
  • Shift Lever Cable|Inner Cable|Optislick: Yes
  • Brake Lever|Brake Hose (Kit): SM-BH90-JK-SSR, SM-BH90-J-SSR
  • Brake Hose Joint: Straight
  • Brake Hose Color (Kit): Black
  • Recommended Brake Caliper: BR-RX400
  • Oil: Shimano Mineral
  • Reach Adjust: Yes
  • Funnel Bleeding: Yes
  • Clamp Band Diameter (mm): 23.8-24.2
  • Shifter Lever Body|Release: Resin & Steel
  • Brake Lever|Material: Aluminum
  • Brake Lever|Finish: Painted
  • Bracket Material|Engineering Composite
  • Clamp Band Material|Steel
  • Average Weight (g): Left: 306, Right: 307

BR-RX400:

  • Model No: Front: BR-RX400-F, Rear: BR-RX400-R
  • Series: GRX
  • Color: Series Color
  • Brake Type: Hydraulic Disc Brake
  • Brake Hose (Kit): SM-BH90-JK-SSR, SM-BH90-J-SSR
  • Hose Joint: Straight
  • Brake Hose Color (Kit): Black
  • J-Kit Spec (for OEM): Yes
  • Ice Technologies Pad Compatible Caliper: Yes
  • Pad|Standard 1: K05S-RX Resin (w/o fin)
  • Pad|Standard 2: L05A-RF Resin (w/ fin)
  • Pad|Option 1: K04S-MX Metal (w/o fin)
  • Pad|Option 2: L04C-MF Metal (w/ fin)
  • Fixing Screw Spec for Rear Mount: 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm
  • Recommended Brake Lever: ST-RX400
  • Recommended Disc Brake Rotor: SM-RT64
  • Oil: Shimano Mineral
  • One Way Bleeding: Yes
  • Mount Type: Flat Mount
  • Piston: 2
  • Caliper Fixing Screw|Tool Size: 4 mm
  • Caliper Fixing Screw|Anti-Loosen Method: Screw Fix Pin + Snap Ring
  • Pad Mount: Pad Axle
  • Remarks: Front Spec with Adaptor

Shipping, Returns & Refunds

We ship across India. Shipping is free on orders above ₹2,000, and ₹99 is charged on orders below ₹2,000. Cash on Delivery is available for orders up to ₹20,000, with additional COD charges based on order value. Most orders are delivered within 3–6 working days, though delays may occasionally occur. Please note that most Shimano products may take longer to ship. View full shipping policy.

Returns can be initiated within 7 days of delivery. Items must be unused, in original condition, and returned with all tags and packaging intact. Returns are available only on select categories such as apparel, helmets, jerseys, gloves, and similar items. Wetsuits and products discounted above 5% are not eligible for return.

Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. Return shipping must be arranged by the customer, as pickup is not available.

For eligible returns, you can choose an exchange, store credit, or a monetary refund. Refunds are processed after deduction of applicable shipping and transaction charges. Order cancellations are only possible before the order is processed. View full Return & Refund Policy.

Shimano Warranty Information