Tektro

Tektro HD-E3940 E-bike Power Control 4 pistons Hydraulic Brake Electric 2pin Set 2.3mm Rotors Optional

$144.99 USD

~~$0.00 USD~~ $144.99 USD

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Unit Type Brakes Only Brakes & 2*180mm Thickness Disc Brake Rotor 2.3MM E-Bike Brakes & 2*203mm Thickness Disc Brake Rotor 2.3MM E-Bike Brakes & 180mm+203mm Set Thickness Disc Brake Rotor 2.3MM E-Bike

DETAILS SPECS Q&A SHIPPING

TEKTRO E3940 E-BIKE HYDRAULIC DISC BRAKE SET (POWER CUT-OFF SENSOR)

LEFT-FRONT 900MM ONE-PIECE & RIGHT-REAR 1850MM SPLIT HOSE CONFIGURATION

Upgrade your high-speed electric bicycle, cargo bike, or heavy-duty E-MTB with the Tektro E3940 hydraulic disc brake set. Engineered specifically for E-Bikes, it features integrated electric power cut-off sensors to instantly disable motor drive during braking. This setup includes a pre-bled 900mm left-front system and an extended 1850mm right-rear system designed with a split hose connection for effortless internal frame routing.

FEATURES

E-Bike Electric Power Cut-Off Sensor: Integrated electrical brake sensor cuts motor power immediately upon lever pull, dramatically enhancing stopping safety and reducing motor drag.
Left-Front 900mm One-Piece Assembly: Pre-bled, fully connected left-front brake ready for quick bolt-on installation.
Right-Rear 1850mm Split Hose System: Features a quick-connect / split hose design that simplifies internal frame routing without losing fluid.
Heavy-Duty Heat Dissipation: Calipers engineered for maximum heat tolerance and consistent lever feel under high-speed E-Bike stopping loads.
Multiple Rotor Bundle Options: Choose between the standalone brake set or complete packages featuring 2.3mm heavy-duty unbranded rotors (180mm, 203mm, or mixed size).

Brand: TEKTRO
Model: E3940
Brake System Type: Hydraulic Disc Brake with Power Cut-Off Sensor
Hose Orientation & Length:
- Left Front: 900 mm (Integrated One-Piece)
- Right Rear: 1850 mm (Split Hose / Quick Disconnect Design for Internal Routing)
Fluid Type: Mineral Oil (Pre-bled)
Sensor Plug Type: Standard E-Bike Motor Cut-off Connector
Available Bundle Options:
- Brake Set Only: Front & Rear Calipers + Levers (Pre-bled)
- Brake Set + 2x 180mm Rotors: Includes 2x 180mm Heavy-Duty Rotors (2.3mm thick, Unbranded)
- Brake Set + 2x 203mm Rotors: Includes 2x 203mm Heavy-Duty Rotors (2.3mm thick, Unbranded)
- Brake Set + Mixed Rotors: Includes 1x 180mm + 1x 203mm Heavy-Duty Rotors (2.3mm thick, Unbranded)
Packaging: Genuine Tektro Workshop / Bulk Packaging

Q: What is the advantage of the split hose (分体) on the rear brake?

A: The 1850mm rear hose features a split disconnect design, making it extremely easy to route through internal bicycle frames without disconnecting the main caliper or needing a complex bleed afterward.

Q: Will the motor cut-off sensor work with my E-Bike controller?

A: The E3940 features standard E-Bike power cut-off wiring. It is compatible with most standard motor controllers (Bafang, Rad Power, Lectric, Ariel Rider, etc.) that support two-pin/three-pin brake sensor inputs.

Q: Are 2.3mm thick rotors necessary for E-Bikes?

A: 2.3mm extra-thick rotors provide superior stiffness and thermal capacity compared to standard 1.8mm rotors, significantly reducing heat warping and brake fade under high weight and motor speed.

Processing Time: Ships within 24–48 hours from our California warehouse.
Delivery Time: Standard shipping usually arrives within 3–7 business days across the US mainland.
Tracking: Tracking information will be emailed immediately once your package is dispatched.

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