IIIPRO E4 4-Piston MTB Hydraulic Disc Brake Set 800/1550mm

IIIPRO E4 4-Piston Hydraulic Disc Brake Set for MTB, Road & Electric Bikes

Upgrade your ride with the IIIPRO E4 4-Piston Hydraulic Disc Brake Set — engineered for mountain bikes, downhill (DH), all-mountain (AM), folding bikes, and electric bikes. This front and rear brake set delivers smooth, consistent, and powerful stopping force, even on the most demanding trails. Made in Mainland China.

Key Features

• 4-Piston Design: Provides smooth, even braking force across the entire pad surface for confident stopping in all conditions.
• Cooling Brake Pads: Multi-metal copper-based ceramic heat sink improves heat dissipation performance by 25%, keeping your brakes responsive during extended descents.
• Mineral Brake Fluid System: Uses mineral oil for a reliable, low-maintenance hydraulic braking experience.
• Magnesium Aluminum Alloy Construction: Lightweight yet durable body keeps your build weight low without sacrificing strength.
• Flexible Control Direction: The split lever design lets you freely configure left-front/right-rear or left-rear/right-front to match your preferred braking setup.
• Internal Cable Routing Compatible: The rear brake supports cable routing inside the frame for a clean, professional build.
• CNC Anti-Skid Vent Brake Lever: Precision-machined lever with built-in bearing, travel adjustment screw, and 22.2mm detachable clamp ring for a customizable, secure fit.
• Wide Color Selection: Available in Black, Red, Silver, Blue, Green, and Purple to match your bike's aesthetic.

Specifications

Component Breakdown

This set includes: ① Cylinder block   ② M6 oil filling screw   ③ CNC anti-skid vent brake lever   ④ Built-in bearing   ⑤ Travel adjustment screw   ⑥ 22.2mm detachable clamp ring

Control Note: Default setup is left hand controlling the front brake and right hand controlling the rear brake. The split lever design allows you to reconfigure to suit your preferred style.

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Frequently Asked Questions

Q: Is this hydraulic disc brake set compatible with electric bikes and folding bikes?

A: Yes! The IIIPRO E4 4-Piston Hydraulic Disc Brake Set is designed for a wide range of bikes including mountain bikes (MTB), downhill (DH), all-mountain (AM), folding bikes, and electric bikes. Always verify your frame's cable routing compatibility before installation.

Q: What type of brake fluid does the IIIPRO E4 hydraulic disc brake use?

A: This brake set uses mineral brake fluid. Do not use DOT fluid, as it is not compatible and may damage the seals. Always use the correct mineral oil when bleeding or topping up the system.

Q: Can I swap the brake lever controls from left-front/right-rear to left-rear/right-front?

A: Absolutely. The split lever design allows you to freely reconfigure the brake levers to your preferred control direction — whether left-front/right-rear or left-rear/right-front — making it highly adaptable to different riding styles and regional preferences.

Q: What are the hose lengths included in this set?

A: The front brake hose is 800mm and the rear brake hose is 1550mm. These lengths are designed to suit standard MTB frame geometries with optional internal cable routing support on the rear.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.