Two on a bike is how Hanoi moves. Doing it legally and comfortably is about one rule and one bike class.
The rule first
Vietnamese law allows one passenger. Helmeted, both of you, always - the passenger’s helmet is as compulsory as the rider’s. Children have their own narrower rules: under threes may not ride at all, and older children need helmets and a proper seat. There is no “just to the corner” exception in the fine schedule.
The bike class that carries two
Mid-size automatic scooters are the two-up tool: a flat floor or a wide seat, pillion footpegs, grab rail, and a wheelbase long enough that a passenger does not destabilise the bike. The Honda Vision class is the standard answer in Hanoi - the seat takes two adults and the under-seat storage swallows both helmets at stops. The Click and Mio class carries two lighter adults fine; two tall riders will want the roomier option. Published rates for these scooters run 150,000-200,000 VND per day.
What does not work two-up
Semi-automatic underbones (Wave/Sirius class) carry two - half of Vietnam proves it daily - but the flat rack is a harder seat, there are no rear footpegs on all variants, and the suspension is built for one plus shopping. For a visitor carrying a passenger daily, the scooter wins.
Riding two-up, briefly
Take-off and slow-speed balance are where the passenger changes everything: the passenger boards after you are settled, sits still at low speeds, and leans with you at speed. Brake earlier; you are stopping two people’s weight. The passenger-rules article covers the legal detail.
Choosing
One passenger, two helmets, mid-size scooter, and confirm the model’s availability for your dates - two riders on a multi-day rental should reserve early. Contact us to confirm current availability.