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

Smooth Shifting and Reliable Braking for Gravel Adventures

Enhanced Terrain Control
Anti-Slip Design
Smooth Shifting Performance

₹19,340

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Type

Left/Front Right/Rear

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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.

Specifications

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

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

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.

What's 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)

Warranty and support

Covered by the manufacturer's warranty. Warranty claims go through us and we deal with the brand for you.

Shimano warranty terms

Questions after delivery? Ask TBA Guide or WhatsApp us.

Shipping and returns

We ship across India. Shipping is free on orders above ₹2,000 and ₹99 below that. Cash on delivery is available on orders up to ₹20,000, with a COD charge that depends on the order value. For a delivery estimate, enter your pincode in the box above the add-to-cart button: it shows the courier's own estimate for your address, not a promised date. If a parcel is held up we chase the courier until it is delivered. Full shipping policy

Most Shimano products take a little longer to ship.

Returns can be started within 7 days of delivery on unused items in their original condition with all tags and packaging. Apparel, helmets, gloves and similar items are returnable; wetsuits and products discounted by more than 5% are not. Compatibility questions are not grounds for a return unless our listing was wrong, so ask us before you order if you are unsure. Return shipping is arranged by you; on an accepted return you can choose an exchange, store credit or a refund after shipping and transaction charges. Orders can be cancelled only until they are processed. Full return and refund policy