There is a trade at the heart of every folding bike. You get a machine that fits in a hallway, a car boot or under a desk, and in exchange you get small wheels, a flexy frame and a bike that cannot carry anything.
Tern has spent a decade refusing that trade. The Vektron S10 folds — ten seconds, into 40 × 85.5 × 67.5 cm — and then behaves like a cargo bike.
The rack is the reason to buy it
The integrated Atlas V rack takes 27 kg. That is not a token pannier rating; it is enough for a week's shopping, or for a child seat with a child in it.
Tern specifies that the rack works with Thule Yepp Maxi and Dash RM child seats directly, with no adapters. Anyone who has tried to bolt a child seat to a folding bike will understand why that single sentence is worth more than most of the spec sheet.
27 kg rack load with an eight-point mounting system.
Bosch mid-drive with 65 Nm and up to 300% assistance.
125 kg maximum gross vehicle weight; 105 kg maximum rider.
One frame size fits riders from 147 to 195 cm.
Folds in ten seconds; a reclining battery lowers the centre of gravity.
The Vektron is not a folding bike with a motor. It is a utility bike that happens to fold, and the difference shows the first time you load it.
22.1 kg is the honest cost
Nobody carries a 22.1 kg bicycle up three flights of stairs twice a day. If your fold has to go up stairs, buy a Brompton and accept the smaller rack.
The Vektron's fold is for storage and for transport: into a car boot, into a hallway cupboard, into a corner of a small flat, onto a train at a quiet hour. Judged that way, the weight stops being a flaw and becomes a specification you plan around.
Who it is for
Families in small flats. People who need one bike to do the commute, the shop and the nursery run, and who have no garage to keep a full-size cargo bike in. The Bosch drivetrain and the European frame certification mean it is built to be ridden loaded, not just to be photographed folded.
Tern sells only through dealers, so the price varies and you cannot order one at midnight. That is a genuine inconvenience — and the reason a Tern arrives set up properly rather than in a box.
See it for yourself
