IIIPRO CNC 4-Piston Flat Mount Hydraulic Disc Brake Caliper

4-Piston Braking Power. CNC Precision. Lightweight Performance.

Upgrade your bike's braking system with the IIIPRO CNC 4-Piston Hydraulic Disc Brake Caliper, designed for riders looking for powerful braking, lightweight construction, and distinctive anodized finishes.

Featuring a one-piece CNC-machined aluminum alloy body and a dual-sided four-piston braking system, this caliper is designed to apply braking pressure from both sides of the rotor for controlled braking performance.

Weighing approximately 85g per caliper, excluding brake pads and mounting bolts, it offers a lightweight option for compatible road and gravel bike builds.

Key Features

4-Piston Hydraulic Braking System

Four pistons work in opposing pairs to apply braking force from both sides of the rotor.

• Dual-sided piston actuation

• Four-piston configuration

• Balanced pad pressure

• Designed for controlled, powerful braking

One-Piece CNC Aluminum Alloy Body

Precision CNC-machined aluminum alloy construction provides a compact, rigid caliper body.

• One-piece aluminum alloy design

• CNC-machined construction

• Lightweight structure

• Precision-machined mounting surfaces

Lightweight Design – Approx. 85g

Each brake caliper weighs approximately 85g, excluding brake pads and mounting bolts.

An ideal option for riders interested in lightweight road bike components.

High-Performance Heat-Dissipating Brake Pads

The included brake pad design features a metal-based friction material and a heat-dissipating backing structure.

Designed to help manage heat during braking.

Mineral Oil Hydraulic System

Designed for mineral oil hydraulic braking systems.

Compatible with BH59 / BH90-type brake hose connections, subject to correct fitting and hydraulic system compatibility.

Do not use DOT brake fluid.

140mm / 160mm Rotor Compatibility

Designed for use with compatible 140mm and 160mm brake rotors.

Correct mounting hardware or adapters may be required depending on the frame, fork, and rotor configuration.

Five Anodized Color Options

Available in:

• Black

• Silver

• Blue

• Purple

• Red

Choose a finish to match your bike's custom build.

Technical Specifications

Available Purchase Options

Single Caliper

Includes one IIIPRO 4-piston hydraulic brake caliper.

Pair

Includes two IIIPRO 4-piston hydraulic brake calipers.

Important Installation & Compatibility Information

• Verify the mounting interface and bolt-hole dimensions before ordering.

• Check compatibility with your existing hydraulic brake lever, hose fittings, and mineral oil system.

• Brake caliper compatibility cannot be determined by hose type alone.

• Maximum stated brake pad thickness is 2.2mm; however, pads thicker than 2.0mm are not recommended by the supplier because adjustment may become difficult.

• Do not overfill the hydraulic reservoir or caliper with mineral oil.

• Use only compatible brake pads, fittings, and mounting hardware.

• Professional installation and bleeding are strongly recommended.

• Always check brake operation, rotor clearance, and hydraulic sealing before riding.

Safety Notice: Brake components are safety-critical. Installation should be carried out by a qualified bicycle mechanic. Incorrect setup may result in reduced braking performance or brake failure.

Verificación de compatibilidad: debido a la complejidad de los modelos y lotes de piezas del fabricante de equipos originales (OEM), puede haber casos en los que este producto sea incompatible.

Al recibir este producto, compárelo con las especificaciones OEM para garantizar la compatibilidad antes de la instalación.

Especificaciones de torque: Instale este producto estrictamente de acuerdo con los valores de torque especificados en el manual de piezas OEM. Problemas de instalación: Si encuentra alguna discrepancia con las especificaciones OEM o enfrenta dificultades en la etapa inicial de instalación, deténgase inmediatamente y comuníquese con el servicio al cliente para obtener ayuda con devoluciones o cambios.

Sin instalación forzada: No fuerce la instalación bajo ninguna circunstancia. Responsabilidad: Cualquier daño resultante de una instalación forzada o modificaciones no autorizadas de este producto (o sus componentes) será responsabilidad exclusiva del comprador.

Todos los productos están fotografiados para representar con precisión los colores que verá al recibirlos.

Debido a diferencias de iluminación, ángulos o configuraciones de pantalla, pueden ocurrir ligeras variaciones de color.

El producto real debe considerarse el estándar. Para los productos "coloreados" y "azules", el proceso de coloración puede generar una distribución desigual del color, lo que hace que cada producto sea único.