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.

호환성 확인: 원제조업체(OEM) 부품의 모델과 배치가 복잡하기 때문에 이 제품이 호환되지 않는 경우가 있을 수 있습니다.

제품을 받으신 후 설치 전에 OEM 사양과 비교하여 호환성을 확인해 주시기 바랍니다.

토크 사양: 이 제품은 OEM 부품 매뉴얼에 명시된 토크 값에 따라 엄격히 설치하십시오. 설치 문제: OEM 사양과 차이가 있거나 설치 초기 단계에서 어려움이 발생할 경우 즉시 중단하고 반품 또는 교환을 위해 고객 서비스에 문의하십시오.

강제 설치 금지: 어떠한 경우에도 강제로 설치하지 마십시오. 책임: 이 제품(또는 그 부품)의 강제 설치 또는 무단 개조로 인한 모든 손해는 구매자의 단독 책임입니다.

모든 제품은 수령 시 보게 될 색상을 정확하게 표현하기 위해 촬영되었습니다.

조명, 각도 또는 화면 설정의 차이로 인해 약간의 색상 차이가 발생할 수 있습니다.

실제 제품을 기준으로 생각해 주시기 바랍니다. "컬러" 및 "블루" 제품의 경우 염색 과정에서 색상 분포가 고르지 않을 수 있어 각 제품이 독특합니다.