BUCKLOS Dual-Piston Hydraulic E‑Bike Disc Brake Kit — Disc Brake Kit, 180mm Rotors, Power‑Off Sensor

BUCKLOS delivers a pre-bled, dual-piston hydraulic disc brake set for e-bikes that increases stopping power and cuts motor drive when you brake.

This brake kit replaces mechanical systems with a compact hydraulic solution tailored for e-bikes and scooters that position rotors on the left side. It comes pre-bled with mineral oil, includes 180mm rotors, and integrates a power-off sensor that stops motor output during braking for added safety. Hose lengths are assigned for front and rear fitment, and the package is designed for straightforward installation by riders who check compatibility first.

How does this brake set improve stopping performance?

The BUCKLOS dual-piston calipers multiply braking force across the pad surface for more consistent, powerful deceleration than single-piston or mechanical cable systems. The design keeps the rotor aligned and reduces heat-related warping so braking stays reliable under repeated stops.

• Dual-piston calipers distribute pressure evenly for stronger, predictable stops.
• 180mm rotors balance bite and heat dissipation for urban and light off-road riding.
• Pre-bled mineral oil reduces initial setup time and minimizes air ingress risk.

What does the power-off feature do, and why does it matter?

A built-in brake sensor interrupts motor power whenever the lever is pulled, helping prevent the motor from continuing to drive the wheel during an emergency or controlled stop. This interaction is an electrical safety measure that works through a waterproof 2-pin connector.

• Power-cut sensor disables motor assist when braking, improving control.
• Waterproof 2-pin connector protects connections from moisture and grime.
• Check your e-bike wiring layout before purchase to confirm compatibility.

How easy is installation and what should I watch for?

The brakes arrive pre-bled and use mineral oil to simplify mounting and reduce the need for immediate bleeding. However, keep the red pad protector in place until the caliper is bolted on and avoid depressing the lever beforehand to prevent fluid loss.

• Pre-bled calipers minimize setup; a basic tool set is typically sufficient for mounting.
• Do not press the lever before installation unless the red pad protector is installed.
• Confirm left-side rotor configuration and hose length requirements (front 1100mm, rear 1800mm).

Will these brakes fit my e-bike model?

The BUCKLOS kit is made specifically for e-bikes and scooters that have rotor assemblies on the left side of the wheel. It is not suitable for systems with right-side rotors or for non-electric bikes lacking the motor cut-off wiring.

• Compatible with e-bikes/scooters that use left-side rotors and have a brake cut-off input.
• Not compatible with right-side rotor setups or bikes without motor cut-off wiring.
• Measure hose routing and lengths before ordering to ensure reach and no tight bends.

Who is this for: Riders upgrading from mechanical or single-piston brakes who want stronger, more consistent stopping power and the safety of a motor-interrupt feature. Ideal for commuters, delivery riders, and casual off-roaders using e-bikes or scooters with left-side rotors who can confirm wiring compatibility and hose length fitment.