BUCKLOS MTB Hydraulic Disc Brakes Left Front 800mm Right Rear 1450mm

In this review the BUCKLOS MTB Hydraulic Disc Brakes are evaluated as a direct upgrade for riders moving off mechanical cable systems. The set's single biggest selling point is its stopping power: customers and hands-on testers report the brakes let you stop confidently with two fingers, which is valuable for trail, downhill and mixed-surface riding. The kit arrives pre-bled with mineral oil and designed to fit many bicycles including e-bikes and fat bikes, so the main attraction is reliable, quiet braking without a complex bleed on first install.

Key Features

• Massive stopping power: The hydraulic system gives stronger, more consistent stopping force than typical mechanical disc setups, useful on steep or technical descents.
• Pre-bled mineral oil: The brakes come pre-bled to simplify installation and get riders on the trail faster without an immediate fluid service.
• Hose lengths optimized: The left-front hose is 800 mm and the right-rear hose is 1450 mm, matching the common left-front/right-back brake convention.
• Wide compatibility: The Zoom HB-875 style caliper is a dual-piston design compatible with 160 mm rotors and fits many bikes including e-bikes, scooters, folding bikes, fat bikes and BMX frames.
• Quiet, durable pads: Resin-metal composite pads help protect rotors and reduce noise during normal riding conditions.

Who It's For

These hydraulic disc brakes are aimed at riders who want a straightforward, cost-effective upgrade from cable-actuated disc brakes: trail riders, commuters on heavy e-bikes, fat bike riders in snow or sand, and anyone who wants stronger modulation for downhill or choppy terrain. The pre-bled setup helps less technical riders fit the system without specialized tools.

Riders who require specific rotor sizes beyond 160 mm for stock fitment should check adapter compatibility, and those who need custom hose lengths beyond the provided 800 mm front and 1450 mm rear may prefer a service from a bike shop or a different kit with bespoke hoses.

Pros & Cons

Pros

• Very strong stopping power that improves confidence on steep or technical terrain.
• Quick installation thanks to pre-bled mineral oil and straightforward fittings.
• Quiet braking with resin-metal composite pads that reduce rotor wear and noise.
• Broad compatibility with many bike types, including e-bikes and fat bikes.

Cons

• Hose lengths are fixed at 800 mm front and 1450 mm rear, so frame fit should be confirmed before ordering.
• If you plan to use 180 mm or 203 mm rotors you will need to replace the adapters for correct fitment.

Specifications

Our Verdict

The BUCKLOS MTB Hydraulic Disc Brakes are a practical, high-value upgrade for riders wanting stronger, quieter braking without an initial bleed procedure. They suit trail, downhill and multipurpose bikes including e-bikes and fat bikes, provided the hose lengths and rotor adapter choices match the frame and rotor sizes. For the price and ease of fit, this set delivers clear stopping improvements over cable-disc systems.

Frequently Asked Questions

Are these brakes ready to install?
Yes, the set ships pre-bled with mineral oil so initial installation is straightforward, though hose routing should be checked against your frame.

Will they fit my e-bike?
The caliper is compatible with many bicycles including e-bikes, but confirm hose length and rotor adapter requirements for your specific frame and rotor size.

Do I need special pads or rotors?
They use resin-metal composite pads and are designed for 160 mm rotors; you will need adapter replacements for 180 mm or 203 mm rotors.