The G4 and G4 Ultra both reach a rated 70 km/h, but they reach that number with very different hardware. The choice turns on motor layout, tire size, charging, and how much control you want on rough surfaces.
Kukirin G4 vs G4 Ultra at a glance
The G4 uses a single 2000 W motor and a 60 V 20 Ah battery. It is rated for up to 75 km and weighs 35.5 kg.
The G4 Ultra uses two 1000 W motors, the same nominal battery capacity, 11-inch tubeless tires, and a faster 5–6 hour charging estimate. It is rated for up to 80 km and weighs 43.4 kg.
| Specification | G4 | G4 Ultra |
|---|---|---|
| Motor | 2000 W | Dual 1000 W |
| Battery | 60 V, 20 Ah | 60 V, 20 Ah |
| Maximum speed | 70 km/h | 70 km/h |
| Rated range | Up to 75 km | Up to 80 km |
| Tires | Wide off-road tires | 11-inch tubeless |
| Charging estimate | 10–11 hours | 5–6 hours |
| Published weight | 35.5 kg | 43.4 kg |
When the Kukirin G4 is the better fit
The G4 is the lighter and simpler option in this pair. Its single high-output motor and lower published weight suit riders who want strong acceleration and a 75 km rating without the extra mass of a second motor and larger wheel package.
When the Kukirin G4 Ultra justifies the weight
The G4 Ultra is aimed at riders who value dual-motor traction, larger tubeless tires, shorter charging time, and the extra five kilometres of rated range. At 43.4 kg, it should be planned around ground-level storage and routes where that hardware can be used safely.
Choose the Kukirin model after checking the whole ride
Confirm the regional variant, local law, warranty support, and storage arrangement. A model that fits the route and the lift is usually more useful than the one with the largest headline number.
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