BUCKLOS 4-Piston Hydraulic Disc Brake Set – E-Bike & MTB

BUCKLOS 4-Piston Power-Off Hydraulic Disc Brake Set — E-Bike, Electric Scooter & MTB

Upgrade your ride with the BUCKLOS HD-E735 4-Piston Hydraulic Disc Brake Set — engineered for e-bikes, electric scooters, and mountain bikes demanding consistent, powerful stopping force. The power-off cut feature automatically cuts motor power when the brake lever is pulled, a critical safety function for e-bikes and e-scooters. With four pistons per caliper, you get superior braking force and modulation compared to standard 2-piston systems, giving you confident control on descents, urban streets, and technical trails alike.

Made in Mainland China.

Key Features

• 4-Piston Caliper: Greater clamping force and more even pad wear for longer-lasting, consistent braking performance.
• Power-Off Function: Integrated motor cut-off switch engages when brake lever is squeezed — essential safety feature for e-bikes and electric scooters.
• Extended Cable Lengths: Front hose ~1150mm / Rear hose ~1950mm — suitable for full-size e-bikes, cargo bikes, and electric scooters with longer frames.
• 160mm Rotor Compatible: Works with standard 160mm 6-bolt disc rotors; choose from three set options (see below).
• Versatile Fitment: Compatible with E-Bike, Electric Scooter, MTB, and similar cycling platforms.
• Lightweight Build: Front caliper ~530g / Rear caliper ~540g — minimal added weight for maximum stopping performance.

Specifications

Available Set Options

Regular Set

Includes the brake lever/caliper set + Basic 160mm Rotor. A solid, dependable setup for everyday riding.

Upgrade Set 1 — Floating Disc Rotor

Includes the brake set + a Floating 160mm Disc Rotor (6-bolt). Floating rotors reduce heat buildup and offer improved bite consistency under demanding conditions.

Performance Set 2 — Hollow Heat Dissipation Rotor

Includes the brake set + BUCKLOS RT78 Ultralight Heat-Dissipation Rotor:

• Model: RT78 | Type: 6-Bolt | Size: 160mm
• Weight: ~105g/pc | Thickness: 1.8mm
• Hollow cutout design accelerates heat dissipation for extended downhill or high-demand braking sessions

What's in the Box

• 1x Front hydraulic brake lever + caliper (with power-off cable), ~1150mm hose
• 1x Rear hydraulic brake lever + caliper (with power-off cable), ~1950mm hose
• 160mm rotor(s) — type depends on set chosen
• Mounting hardware

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Frequently Asked Questions

Q: Is this hydraulic brake set compatible with standard e-bikes and electric scooters?

A: Yes. The BUCKLOS HD-E735 hydraulic disc brake set is specifically designed for e-bikes, electric scooters, and MTB bicycles. The integrated power-off (motor cut) function is particularly important for e-bikes, cutting motor power automatically when the brake lever is engaged for safer stopping.

Q: What rotor size does this brake set use?

A: This brake set is compatible with 160mm 6-bolt disc rotors. Depending on your chosen set (Regular, Upgrade, or Performance), either a basic, floating, or hollow heat-dissipation 160mm rotor is included.

Q: What is the difference between the Regular, Upgrade, and Performance sets?

A: All three sets include the same 4-piston hydraulic brake levers and calipers. The difference is the included rotor: the Regular Set comes with a standard 160mm rotor, the Upgrade Set 1 includes a floating rotor for better heat management, and the Performance Set 2 includes the BUCKLOS RT78 ultralight hollow heat-dissipation rotor (1.8mm thick, ~105g) for maximum thermal performance in demanding riding conditions.

Q: Are the cable hose lengths long enough for full-size e-bikes?

A: Yes. The front hose is approximately 1150mm and the rear hose is approximately 1950mm — these extended lengths are specifically chosen to accommodate the longer frames of e-bikes, cargo bikes, and electric scooters compared to standard MTB setups.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.