BUCKLOS 4-Piston E-Bike Hydraulic Disc Brake Set | HD-E735
BUCKLOS 4-Piston E-Bike Hydraulic Disc Brake Set | HD-E735
BUCKLOS 4-Piston Power-Off Hydraulic Disc Brake Set for E-Bike, MTB & Electric Scooter
Upgrade your electric bike, mountain bike, or scooter with the BUCKLOS HD-E735 Power-Off Hydraulic Disc Brake Set. Engineered with a 4-piston caliper design and a dedicated power-cut (motor inhibitor) function, this brake system delivers confident, responsive stopping force every time you ride. Whether you're navigating steep descents or urban streets, the BUCKLOS hydraulic brake set gives you the control and reliability your ride demands.
Made in Mainland China.
Key Features
- Power-Off / Motor Inhibitor Function: Automatically cuts motor power when brakes are engaged, ideal for e-bikes and electric scooters for smooth, safe deceleration.
- 4-Piston Hydraulic Caliper: Four pistons provide even, powerful clamping force across the 160mm rotor for consistent, fade-resistant braking performance.
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Three Set Options Available:
- Regular Set: Includes a standard Basic 160mm Rotor for reliable everyday performance.
- Upgrade Set 1: Includes a Floating 160mm Disc Rotor (6-bolt) for improved heat dissipation and modulation.
- Performance Set 2: Includes the ultralight BUCKLOS RT78 hollow heat-dissipation 160mm Rotor (1.8mm thick, ~105g) for maximum braking efficiency and rapid heat dispersal.
- Generous Cable Lengths: Front hose ~1150mm / Rear hose ~1950mm — fits most full-size e-bikes and MTB frames without extension hassles.
- Installation Direction: Left front, right rear — standard ergonomic setup.
- Wide Compatibility: Designed for E-Bikes, Electric Scooters, and MTB applications.
- No High-Concern Chemicals: Contains none — safe for daily handling.
Specifications
| Brand | BUCKLOS |
| Model | HD-E735 |
| Braking System | Hydraulic Disc Brake (Hydraulic Brake Pad) |
| Pistons | 4-Piston |
| Front Cable Length | ~1150mm |
| Rear Cable Length | ~1950mm |
| Weight | Front ~530g / Rear ~540g |
| Rotor Size | 160mm (6-bolt) |
| Fit For | E-Bike, Electric Scooter, MTB |
| Country of Origin | Mainland China |
Compatible With
This hydraulic disc brake set is compatible with most standard e-bike, electric scooter, and mountain bike frames using a 160mm 6-bolt rotor setup. Check your frame's brake mount type (IS or PM) before purchasing.
You May Also Like
- 1PC 10g High Grade Silicone Grease Lubricant for O-Rings & Tubes — great for brake caliper maintenance and hydraulic fittings.
- 3PCS Silicone Sealant Scraper Set — handy multi-tool set for workshop and maintenance tasks.
- Multi-Use Wrenches Detach Tool — a versatile wrench set useful for bike assembly and hardware adjustments.
Learn more: HHS Move Your Way physical activity guidance
Frequently Asked Questions
Q: What is the "Power-Off" feature on the BUCKLOS HD-E735 hydraulic brake?
A: The power-off (motor inhibitor) feature sends a signal to cut the e-bike or electric scooter motor the instant the brake lever is engaged. This prevents the motor from fighting against the braking force, resulting in smoother stops, less wear on your drivetrain, and a safer ride overall. It is a must-have feature for most mid-drive and hub-motor e-bikes.
Q: Is this brake set compatible with my mountain bike or only e-bikes?
A: The BUCKLOS HD-E735 is designed for E-Bikes and Electric Scooters as the primary application, but it is also fully compatible with MTB (mountain bike) setups that use a standard 160mm 6-bolt rotor mount. The hydraulic disc brake system works on any bike frame with the appropriate IS or PM brake caliper mount.
Q: What is the difference between the Regular Set, Upgrade Set 1, and Performance Set 2?
A: All three sets include the same 4-piston hydraulic brake caliper and hose. The difference is in the included rotor: the Regular Set comes with a standard basic 160mm rotor; Upgrade Set 1 includes a floating disc rotor for better heat dissipation and modulation; and Performance Set 2 includes the premium BUCKLOS RT78 ultralight hollow heat-dissipation rotor (only 105g, 1.8mm thick), which is ideal for high-demand or performance riding where rapid heat dispersal is essential.
Q: Are the hose lengths sufficient for full-size e-bikes?
A: Yes. The front hose measures approximately 1150mm and the rear hose approximately 1950mm, which accommodates the majority of full-size e-bike and MTB frames without requiring an extension. If your frame has an unusually long rear triangle or a unique routing path, measure your current hose length before ordering.
Q: What rotor size is compatible with this brake caliper?
A: The BUCKLOS HD-E735 hydraulic brake is designed to be used with a 160mm brake rotor (6-bolt). All three set options include a 160mm rotor variant. Using a different rotor size may require an adapter and is not officially recommended by the manufacturer.
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.