Waterproof Silver Commuter Bike Internal Geared Rear Hub Sealed
| Reference Product Family: | A03 Automatic 3-Speed Internal Gear Hub Series | Application Focus: | Shared E-Bike Fleet Platforms |
| Target Vehicle Type: | Shared E-Bikes / Rental E-Bikes / Urban Mobility Fleet Vehicles | Shifting Positioning: | CentriGear Automatic Mechanical Shifting |
| Fleet Drivetrain Positioning: | Sealed Internal Gear Hub For Cleaner Shared E-Bike Rear-Wheel Integration | Brake Matching Options: | 6-Bolt Disc Brake |
| Outdoor Use: | IPX6 Waterproof Rating | Technical Data Source: | Detailed Values Follow The A03 Family Common Parameters And SKU Difference Reference Table. |
| High Light: | Waterproof geared rear hub,silver geared rear hub,Sealed commuter bike internal gear hub |
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The Auto 3-Speed Gear Hub For Shared E-Bike Fleet Platforms is designed for OEM shared mobility projects that need automatic shifting, stable daily riding and a cleaner rear hub drivetrain for high-frequency public use. It is positioned around the Lofandi A03 automatic 3-speed internal gear hub family, with the application focus placed on shared e-bike fleet platforms rather than one chain or belt drive SKU.
Shared e-bike fleets are used by many riders with different habits, trip lengths and riding conditions. CentriGear automatic mechanical shifting helps reduce rider-side gear operation, so the vehicle can provide a more consistent riding experience across the fleet. This is useful for public-use e-bikes where simplicity and predictable operation matter.
For OEM fleet platforms, the A03 family also supports drivetrain planning at the platform level. The chain-drive direction can fit practical shared e-bike layouts, while the belt-drive direction can support cleaner and quieter fleet concepts. Final SKU selection should follow the A03 family technical table so the drivetrain, brake interface and frame structure are matched correctly.
- Shared E-Bike Fleet Focus: Designed for public-use e-bike platforms that need automatic shifting and consistent riding behavior.
- Automatic 3-Speed Operation: Supports daily starts, cruising and moderate urban riding without rider-operated gear selection.
- CentriGear Mechanical Shifting: Uses automatic mechanical shifting based on riding speed rather than electronic shift control.
- Fleet Platform Standardization: Helps OEM teams plan a more unified drivetrain direction across shared e-bike models.
- Sealed Internal Hub Structure: Keeps the main gear mechanism inside the rear hub shell for cleaner fleet drivetrain management.
- Chain And Belt Drive Directions: Allows shared mobility projects to compare practical chain drive and cleaner belt drive layouts.
- 6-Bolt Disc Brake Matching: Supports modern rear-wheel braking layouts within the A03 reference family.
- OEM Fleet Matching: Final SKU selection can follow chainline, belt-line, cog matching, frame structure and service workflow.

| Parameter | Specification |
|---|---|
| Product Family | A03 Automatic 3-Speed Internal Gear Hub Series |
| Reference Models | LG-N7118-3D / LG-N7122-3D |
| Product Category | Automatic Gear Hub |
| Speed Level | 3 Speed |
| Total Gear Ratio | 166% |
| Gear Ratios | 1.00 / 1.29 / 1.66 |
| Shifting Technology | CentriGear Automatic Mechanical Shifting |
| Brake Type | 6-Bolt Disc Brake |
| Spoke Size | #13 / #14 |
| O.L.D. | 135 mm |
| Axle Length | 184 mm |
| Disc Brake Mounting Width | 13 mm |
| Color | Black |
| Average Weight | 1.64 kg |
| Operating / Storage Temperature | -30-80℃ / -40-85℃ |
| Waterproof Rating | IPX6 |
| Certification | RoHS / REACH |
| Reference Model | Drive Type | Matching Cog | Chainline G1 / G2 | Best Application |
|---|---|---|---|---|
| LG-N7118-3D | Chain Drive | Chain Sprocket / Threaded Buckle | 49 / 43.4 mm | Chain drive city e-bikes and commuter OEM projects |
| LG-N7122-3D | Belt Drive | 9-Tooth Belt Cog, 6.2 mm Slot | 57 / Not Provided | Belt drive premium city e-bikes and low-maintenance platforms |
The A03 automatic internal gear hub uses CentriGear mechanical shifting combined with planetary gear transmission. As riding speed changes, the hub shifts automatically inside the rear wheel assembly. For shared e-bike fleets, this reduces the need for riders to make manual gear decisions during short urban trips.
The sealed internal hub structure supports cleaner drivetrain management for fleet vehicles. Because the gear mechanism is enclosed inside the hub shell, the rear wheel area has fewer exposed shifting components than external derailleur systems. This is useful for e-bikes that are parked outdoors, ridden frequently and serviced by fleet maintenance teams.
The A03 family should be selected by platform matching requirements. The chain-drive direction and belt-drive direction have different matching needs, so OEM teams should confirm chainline or belt-line, cog matching, brake interface, frame structure and wheel specification before sampling or production.
This auto 3-speed gear hub solution is suitable for shared e-bike fleets, rental e-bike platforms, urban mobility vehicles and OEM city e-bike projects that require automatic internal shifting and a cleaner rear hub drivetrain.
It is especially useful for shared mobility platforms where many riders use the same vehicle, and where fleet operators need consistent riding behavior, outdoor-ready drivetrain integration and practical service planning.
Before sampling or production, OEM customers should confirm drive system, chainline or belt-line, belt cog or chain sprocket matching, brake interface, frame O.L.D., spoke specification, rear fork structure, wheel specification, fleet service workflow and final image/SKU matching.
Q: What is the main application focus of this page?
A: It focuses on A03 automatic 3-speed internal gear hubs for shared e-bike fleet platforms.
Q: Is A03 an electronic shifting hub?
A: No. A03 uses CentriGear automatic mechanical shifting based on riding speed and internal mechanical structure.
Q: Why is automatic 3-speed shifting useful for shared e-bike fleets?
A: It helps reduce rider-side gear operation and supports more consistent use across vehicles ridden by many different users.
Q: Which A03 reference models are included?
A: The A03 reference family includes LG-N7118-3D for chain drive and LG-N7122-3D for belt drive.
Q: What is the backend product category?
A: The backend product category should be Automatic Gear Hub.
Q: What should be confirmed before OEM sampling?
A: Confirm drive system, chainline or belt-line, cog matching, brake interface, frame O.L.D., spoke specification, wheel structure and fleet service needs.