Electric two-wheelers in Vietnam come with the motor in one of two places: inside the wheel itself, or at the centre of the frame driving the rear wheel through a chain. The position changes the character of the bike more than most spec-sheet numbers do.
The hub motor: the Vietnamese mainstream
A hub motor lives inside the wheel hub, with no chain or belt between the motor and the tyre. VinFast’s electric scooters all use in-hub BLDC motors — the Evo carries a 2,450 W unit, the Feliz II and Viper 3,000 W units — and Dat Bike’s Weaver and Weaver 200 are hub-motor machines too (5,000 W and 6,000 W respectively, per the official product pages).
The advantages are practical: no chain to lube, adjust or replace, fewer moving parts, and packaging that fits the step-through scooter shapes Vietnamese riders already know. The trade-off is unsprung weight — the motor spins with the wheel, so bumps feed directly into it — and the simple fact that a wheel replacement is no longer a purely mechanical job.
The mid motor: the newer alternative
A mid motor sits at the frame’s centreline and sends power to the rear wheel through a conventional drive. Dat Bike’s Weaver++ is the mid-motor option in the verified Vietnamese line-up, with a fast-charging port, adjustable chainring and app connectivity listed on its official page.
The mid layout centralises mass where the rider’s weight already is, which helps handling, and it lets the manufacturer tune the final drive. The costs are the ones every chain-driven bike has: chain stretch, wear and adjustment are back on the maintenance list, and the motor itself is a sealed unit a home mechanic should not open.
Which one fits which rider
| Priority | Better fit |
|---|---|
| Minimal maintenance, city step-through use | Hub motor |
| Chain-free commuting with swap batteries | Hub motor (VinFast class) |
| Sportier response, touring use | Mid motor (Weaver++ class) |
| Lowest cost of moving parts over time | Hub motor, but budget for the wheel |
Either way, the licence question is decided by rated power, not motor position — above 4 kW you need an A1 licence under Article 57 of Law 36/2024/QH15. The Weaver 200 and Weaver++ sit above that line; the VinFast scooter class sits below it. Our power-and-licence guide maps the whole ladder.