Julet M6 M8 Waterproof eBike Connector with Wire – Electric Bicycle Sensor Display Plug

Description

Julet M6/M8 Waterproof eBike Connector with Wire – Male/Female Butt Joint for Electric Bicycle Sensor & Display

Julet-brand waterproof circular connectors are the de facto standard for electric bicycle (eBike) sensor, display, and motor connections in the Chinese eBike industry. The M6 (6mm thread) and M8 (8mm thread) sizes cover the majority of eBike sensor and display cable connections — including speed sensors, PAS (pedal assist sensor) connectors, display data cables, brake sensor connectors, and throttle connections. Pre-wired with 15cm leads for direct splice installation without specialized crimp tooling.

Key Specifications

Brand: Julet (Higo compatible)
Thread Sizes: M6 (6mm) and M8 (8mm) (select above)
Pin Configurations: 2, 3, 4, 5, 6 pin (varies by size and application)
Waterproof Rating: IP67
Wire Length: 15cm per lead
Wire Gauge: 22–20AWG
Operating Voltage: 36V/48V/52V eBike systems
Operating Temperature: -20°C to +85°C
Quantity: 5, 20, or 100 pieces (select above)

M6 vs M8 — Which Size for Your eBike?

M6 (6mm thread): Used for low-current signal connections — speed sensors, PAS sensors, brake sensors, display data cables. The smaller size is standard for sensor and signal wiring on most Chinese-manufactured eBike systems (Bafang, Tongsheng, generic hub motor systems).
M8 (8mm thread): Used for higher-current connections — throttle connectors, display power cables, and some motor phase sensor connections. The larger thread provides a more robust mechanical connection for cables subject to frequent disconnection.
Identification tip: Measure the thread OD of the existing connector with a caliper. M6 = 6mm OD; M8 = 8mm OD. Do not confuse thread size with pin count — both M6 and M8 are available in multiple pin counts.

Julet vs Higo — Compatibility

Julet and Higo are the two dominant eBike connector brands in the Chinese market. They use the same thread size and pin layout standards, making them cross-compatible in most configurations:

Julet M6 3-pin mates with Higo M6 3-pin ✔
Julet M8 5-pin mates with Higo M8 5-pin ✔
Cross-compatibility is mechanical — always verify pin assignment before connecting to avoid polarity reversal

What Questions Does This Product Answer?

"How do I identify a damaged Julet connector on my eBike?" — Common failure signs: (1) intermittent sensor fault (speed display drops out, PAS cuts in and out); (2) visible corrosion on connector pins; (3) cracked or broken connector housing from impact or UV degradation; (4) water ingress causing display errors after rain. Replace the connector pigtail rather than the entire cable when only the connector end is damaged.
"What is the pin assignment for a Julet M6 3-pin speed sensor connector?" — Standard Julet M6 3-pin: Pin 1 = +5V supply (red), Pin 2 = Signal (green/yellow), Pin 3 = GND (black). Always verify against the specific controller’s wiring diagram — some controllers use different color codes.
"Can I use Julet connectors on a Bafang mid-drive motor?" — Yes. Bafang BBS01/BBS02/BBSHD systems use Julet/Higo compatible M6 and M8 connectors for sensor and display connections. Match the pin count and thread size to the existing connector.
"How do I waterproof a spliced eBike connector?" — Use adhesive-lined heat-shrink tubing over the splice joint. Apply dielectric grease to the mated connector contacts before mating. Secure the connector with a cable tie to prevent the mated pair from being pulled apart by cable movement.

Typical Applications

Speed sensor replacement: Replacing damaged speed sensor connectors on hub motor eBikes
PAS sensor repair: Restoring pedal assist sensor connections on mid-drive and hub motor systems
Display cable repair: Replacing damaged display data cable connectors
Throttle connector replacement: Restoring throttle connections on throttle-equipped eBike systems
Custom eBike builds: Adding waterproof connector interfaces to custom eBike wiring harnesses