2025 FM4 ONIRII 4 Piston Flat Mount Hydraulic Disc Calipers Clamps Min

Brand: ONIRII
Model: FM4
Version: 2025
Piston: 4 pistons
Oil: Mineral oil
Weight: 117.5g (with screws)
Hose length: front brake 70mm, rear brake 34mm
Compatible rotors: 140/160mm
Installation: Flat Mount
For: road bike

Parts Index:
①Caliper
②Brake pads
③Brake pad bolts
④Piston cover
⑤Connecting oil hose

Provides plenty of braking power for downhill climbs

Symmetrical 4-piston design with far more braking power than 2-piston design

7075 Aluminum alloy material + CNC forging process
Lightweight without losing rigidity

Smooth and precise
Braking is precise and quick, and the handling is at your fingertips

High-quality seals and precision-engineered pistons
Ensure smooth and fluid piston movement, responsive without delay.

4 times the power of extreme heat dissipation, more stable downhill speed control

Pre-purchase Notes:

1, This brake warranty 1 year, brake pads are wear parts, not under warranty.

2, Brake installation is a professional process, it is recommended to the bike store for installation.

Instructions for use:

1, Daily use should be regularly checked brake pads wear.

2, Brakes after a certain period of time will appear lack of oil or internal air into the situation, need to regularly check and refill the brake fluid.

3, Caliper piston in the installation process in advance of the lubricant, such as you find a small amount of lubricant overflow is normal!