The A02 Automatic 2-Speed Internal Gear Hub is a maintenance-free mechanical shifting series for urban e-bikes, shared city bicycles and light mobility platforms. It is designed to make daily riding simpler by shifting automatically between two gear ratios inside the rear hub, without requiring a handlebar shifter or gear cable for normal riding.

The A02 series uses CentriGear mechanical shifting technology. Based on centrifugal-force triggering and planetary gear operation, the hub changes between a 1.00 starting ratio and a 1.33 cruising ratio as riding conditions change. This gives riders an easier start at low speed and a more efficient cruising feel once the bicycle is moving.

For OEM brands and fleet operators, the main value is simplicity. The sealed internal gear structure keeps the shifting mechanism inside the hub body, supports a cleaner rear-wheel layout and reduces exposed shifting parts. The A02 series includes chain drive, belt drive and drum brake lock matching directions, allowing product teams to choose the right version according to frame spacing, brake structure and drivetrain layout.

• Mechanical Automatic 2-Speed Shifting: No manual shifter required for normal riding.

• CentriGear Shifting Technology: Uses centrifugal-force triggering and planetary gear operation.

• 1.00 / 1.33 Gear Ratios: Low gear for starting and high gear for cruising.

• 133% Total Gear Range: A simple ratio range for urban e-bike and city riding.

• Maintenance-Free Sealed Design: Keeps the shifting mechanism protected inside the hub.

• Cleaner Rear-Wheel Layout: Reduces exposed shifting parts compared with external shifting systems.

• Shared/Fleet Application Focus: Suitable for public-use city bicycles when the selected model matches the frame and brake structure.

• Multiple A02 Versions: Chain drive disc brake, belt drive disc brake and drum brake lock matching options.

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A02 uses a mechanical automatic shifting structure. The internal mechanism is based on CentriGear shifting logic, where centrifugal-force triggering works with a planetary gear system to change between the low and high gear ratios. The low gear supports easier starting, while the high gear supports more efficient cruising in city riding.

The product page should not publish shift trigger speed, threshold values or threshold adjustment procedures. These details should be handled through project communication when required.

A02 is suitable for urban e-bikes, city commuter bicycles, shared e-bike fleets, rental bicycles, campus mobility vehicles and light electric mobility products that need simple operation, a clean rear-wheel structure and maintenance-free internal shifting.

OEM Matching Notes

Before sampling, OEM customers should confirm rear frame drawing, O.L.D., brake type, chainline or belt line, spoke specification, axle matching, wheel build, target vehicle type and expected operating environment. Installation and matching details should be confirmed during project communication.

Q: What is A02? A: A02 is a mechanical automatic 2-speed internal gear hub series for urban e-bikes, shared city bicycles and light mobility products.

Q: Does A02 need a manual shifter? A: No. A02 shifts automatically between two gear ratios and does not require a manual shifter for normal riding.

Q: Is A02 an electronic shifting hub? A: No. A02 is a mechanical automatic internal gear hub. It should not be described with electronic control, CAN, Bluetooth, AI or sensor wording.

Q: How does A02 work? A: It uses CentriGear mechanical shifting, based on centrifugal-force triggering and planetary gear operation, to shift between a starting ratio and a cruising ratio.

Q: Is A02 suitable for shared or fleet bicycles? A: Yes. A02 can be positioned for shared or fleet-style city bicycles when the selected model matches the frame, brake structure and maintenance strategy.