Electronic 3-Speed Internal Gear Hub for Premium City E-Bikes
| Model: | E03-7003D | Product Category: | Product Category3 Speed Internal Gear Hub |
| Application Focus: | Premium City E-Bikes | Target Buyer: | E-Bike Brands / OEM Product Managers / Smart Bicycle R&D Teams |
| Shifting Positioning: | Electronic 3-Speed Internal Gear Hub With Automatic Intelligent Shifting | Control Mode: | Automatic Intelligent Shifting + Bluetooth Manual Shifting |
| Smart Drivetrain Value: | Real-Time Riding-Condition Response For More Intuitive Urban Riding | Integration Value: | Cleaner Rear-Wheel Drivetrain Layout For OEM Vehicle Design |
| Electrical Interface: | CAN Interface, 12V DC Rated Voltage, 9V-18V DC Operating Voltage Range | Brake Matching: | 6-Bolt Disc Brake |
| Waterproof: | IPX6 | Certification: | RoHS / REACH |
| High Light: | 3-speed internal gear hub for e-bikes,electronic internal gear hub city bikes,premium e-bike 3-speed gear hub |
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Product Description
Electronic 3-Speed Internal Gear Hub for Smart E-Bike OEM Projects | Official Product Description
Product Overview
The E03-7003D Electronic 3-Speed Internal Gear Hub is designed for smart e-bike OEM projects, premium city e-bikes and connected commuter bicycle platforms that need electronic shifting inside a clean rear-wheel drivetrain structure. It combines automatic intelligent shifting, Bluetooth manual shifting and a sealed internal gear hub layout, giving vehicle brands a more integrated alternative to exposed rear shifting systems.
For premium city e-bike development, the main value of E03 is not only the three-speed ratio range, but the riding experience created by electronic shift control. The system is designed to sense riding conditions in real time and manage gear changes during starts, climbs, cruising and stop-and-go urban riding. The rider does not need to think about every shift; the bicycle responds more naturally to the riding situation.
Application Scenarios
- Premium city e-bikes requiring a cleaner rear-wheel drivetrain design.
- Smart commuter e-bikes focused on intuitive daily riding.
- OEM e-bike projects that need electronic shifting integration.
- High-end urban mobility models where appearance, control feel and drivetrain integration matter.
- E-bike platforms requiring CAN interface matching and project-level customization.
Technical Advantages / How It Works
E03-7003D uses an internal 3-speed gear structure to change transmission ratios inside the rear hub. Electronic shifting support allows the hub to manage gear changes automatically according to riding conditions, helping the bicycle respond more intuitively during starting, climbing, cruising and repeated city stop-and-go use.
The automatic mode is intended to reduce rider-side gear selection work. Instead of asking the rider to judge each shift manually, the system supports a more natural riding experience where gear changes happen as part of the ride. Bluetooth manual shifting remains available when a project needs a direct rider control option.
For OEM smart e-bike platforms, the engineering value comes from combining mechanical integration and electronic matching review. Rear frame structure, 142 mm O.L.D., 6-bolt disc brake layout, spoke specification, voltage platform, CAN interface requirement and waterproof target should be confirmed together before final product matching.
Technical Parameters
| Parameter | Specification |
|---|---|
| Product Name | Electronic 3-Speed Internal Gear Hub |
| Model | E03-7003D |
| Product Category | 3 Speed Internal Gear Hub |
| Speed Level | 3 Speed |
| Total Gear Ratio | 217% |
| Gear Ratio 1 | 1.00 |
| Gear Ratio 2 | 1.47 |
| Gear Ratio 3 | 2.17 |
| Brake Type | 6-Bolt Disc Brake |
| Hub Shell Material | Aluminum |
| Spoke Size | #13 / #14 |
| O.L.D. | 142 mm |
| Axle Length | 198 mm |
| Distance Between Spoke Flanges | 68 mm |
| Spoke Hole P.C.D. | 96.4 mm |
| Spoke Flange Diameter | 110 mm |
| Spoke Hole Number | 36H |
| Thread Size | M12 * 1.25 |
| Chainline G1 | 56.7 mm |
| Chainline G2 | 51.6 mm |
| Belt Line G3 | 55.2 mm |
| Offset | 0.5 mm |
| Disc Brake Mounting Width | 15.3 mm |
| Connector Outer Diameter | 5.5 mm |
| Connector Length | 16.7 mm |
| Exposed Cable Length | 100 mm |
| Cable Diameter | 3.3 mm |
| Color | Black |
| Weight | 1.94 kg |
| Rated Voltage | 12V DC |
| Working Voltage Range | 9V–18V DC |
| Power Supply Requirement | ≥2.5A @ 12V |
| Quiescent Current | 650μA @ 12V |
| Locked-Rotor Current | ≤2.5A @ 12V |
| Communication Interface | CAN Interface |
| Baud Rate | Standard baud rate, subject to actual technical connection |
Applications
E03-7003D is suitable for premium city e-bikes, smart commuter e-bikes, connected electric bicycles and OEM drivetrain development projects that require electronic 3-speed internal shifting and a cleaner rear hub layout. It is especially useful for platforms where the brand wants a more intuitive riding experience, less exposed drivetrain complexity and a smart e-bike system direction with CAN interface review.
For high-end urban bicycle projects, E03 can support product differentiation by combining automatic shifting, Bluetooth manual control, sealed hub protection and 6-bolt disc brake matching in one rear-wheel drivetrain direction.
OEM Matching Notes
Before sampling or production, OEM customers should confirm rear frame drawing, 142 mm O.L.D., 6-bolt disc brake layout, spoke specification, chainline or belt-line target, voltage platform, CAN interface requirement, cable routing, waterproof requirement, target vehicle type and expected riding conditions. Detailed CAN protocol logic should be confirmed during technical communication rather than published as general website content.
FAQ
Q: Is E03-7003D a hub motor? A: No. E03-7003D is an electronic 3-speed internal gear hub. It should not be described as a hub motor.
Q: What type of e-bike is this version best suited for? A: It is suitable for premium city e-bikes, smart commuter bikes and OEM e-bike platforms that require a compact electronic shifting hub and cleaner rear-wheel drivetrain integration.
Q: Does E03 support automatic and manual shifting? A: Yes. E03 supports automatic intelligent shifting and Bluetooth manual shifting, allowing the system to handle gear changes automatically while retaining a manual control option.
Q: How does E03 improve rider experience? A: It helps reduce the need for riders to think about gear selection during starts, climbs, cruising and stop-and-go riding. The shifting experience becomes more intuitive and less intrusive.
Q: What should OEM customers confirm before sampling? A: OEM customers should confirm rear frame drawing, 142 mm O.L.D., 6-bolt disc brake layout, spoke specification, chainline or belt-line target, voltage platform, CAN interface requirement and installation space.
Q: Can E03 be used with belt drive? A: Source data includes belt-line information, but final belt sprocket compatibility should be confirmed according to project drawings and component matching.
Q: Does E03 have certification? A: Yes. RoHS / REACH certification is available for E03.
Q: Can CAN communication details be provided on the website? A: The website should only state CAN interface / CAN integration at this stage. Detailed CAN protocol and project logic should be confirmed during technical communication.
