ZOOM 2-Piston Hydraulic Disc Brake Set MTB E-Bike 1100/1850mm
ZOOM 2-Piston Hydraulic Disc Brake Set MTB E-Bike 1100/1850mm
ZOOM HB775E Hydraulic Disc Brake Set for MTB, E-Bike & Folding Bikes
Upgrade your mountain bike, e-bike, scooter, or folding bike with the ZOOM HB775E 2-Piston Hydraulic Disc Brake Set. Engineered for confident, consistent stopping power, this oil-pressure braking system delivers smooth lever feel and precise modulation on every ride — whether you're tackling technical trails or navigating city streets.
Available as a complete front + rear pair (Front: 1100mm hose / Rear: 1850mm hose), this brake set is pre-filled with mineral oil for easy installation and immediate use.
Made in Mainland China.
Key Features
- 2-Piston Hydraulic System — Integrated molding oil cylinder for reliable, leak-resistant performance
- Pre-filled with Mineral Oil — Ready to install straight out of the box
- Universal Rotor Compatibility — Fits 160mm and 180mm rotors
- Adapter Specifications: F160-R140 / F180-R160 OR IS-A 180mm
- Optimal Hose Lengths: Front = 1100mm | Rear = 1850mm
- Lightweight Design — Only 740g (without rotor)
- Wide Compatibility — Suitable for MTB, e-bikes, electric scooters, and folding bikes
Specifications
| Model | HB775E |
| Brand | ZOOM |
| Braking System | Hydraulic Disc Brake (Oil Pressure) |
| Pistons | 2 Pistons |
| Rotor Compatibility | 160mm / 180mm |
| Adapter Spec | F160-R140 / F180-R160 or IS-A 180mm |
| Hose Length | Front: 1100mm | Rear: 1850mm |
| Weight | 740g (without rotor) |
| Fluid Type | Mineral Oil |
| Origin | Made in Mainland China |
⚠️ Important Installation Notes
Please read before installing:
- Do NOT press the brake lever before or during installation. The lever is pre-filled with oil — pressing it prematurely can cause oil leakage and require a refill. Only squeeze the lever after the brake is fully installed, at which point the oil will flow naturally from the lever into the caliper via the oil pipe.
- Keep the mold block (brake pad protection block) inside the caliper in place until the brake is completely installed. Removing it early may cause the piston to shift, resulting in oil leakage or improper piston rebound.
What's in the Box
- 1x Front Hydraulic Brake Lever + Caliper (1100mm hose) — Left Hand
- 1x Rear Hydraulic Brake Lever + Caliper (1850mm hose) — Right Hand
- Brake pads pre-installed
- Hardware for mounting
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Frequently Asked Questions
Q: Is this ZOOM hydraulic disc brake set compatible with my e-bike or electric scooter?
A: Yes! The ZOOM HB775E hydraulic disc brake set is designed for MTB, e-bikes, electric scooters, and folding bikes. As long as your bike uses a standard 160mm or 180mm rotor and the adapter specifications (F160-R140 / F180-R160 or IS-A 180mm) match your fork and frame, this brake set will be compatible.
Q: Does this brake set come pre-filled with oil, or do I need to bleed it myself?
A: The brake levers come pre-filled with mineral oil — no bleeding is required before installation. Once the brake is fully and correctly installed, simply squeeze the lever and the oil will flow from the lever through the hose into the caliper automatically. Just be sure NOT to press the lever before installation is complete to avoid oil leakage.
Q: What is the difference between the 1100mm and 1850mm hose options?
A: The 1100mm hose is intended for the front brake (left-hand lever), while the 1850mm hose is for the rear brake (right-hand lever). This set includes both lengths as a complete front + rear pair, ensuring the correct hose length for each position on your bike.
Q: How much does the ZOOM HB775E brake set weigh?
A: The complete brake set weighs approximately 740 grams, not including the rotor. This makes it a lightweight yet robust choice for both trail riding and everyday commuting on folding bikes or e-bikes.
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.