2025 ONIRII IIIPRO R2X4 MTB Hydraulic Disc Brake 4 Piston Internal Cable Quick Release MTB Caliper for MTB, Climbing, AM,XC NEW

The R2X4 is a mountain hydraulic disc brake designed for various types of bikes, featuring CNC-machined aluminum alloy construction and a lightweight design.

• The description claims the product achieves a perfect balance of lightweight and durability through CNC precision hollowing.
• The description claims the brake lever provides a comfortable grip and precise control.
• The description claims the single-side, 4-bearing structure offers strong braking power.