Between 30 and 70 km, depending on terrain and level of assistance.
Tern or Brompton: which is right for you?
Looking for an electric folding bike? Then you'll quickly come across two big names: Brompton and Tern. Both brands have excellent reputations, but they appeal to very different cyclist profiles.
In this article, we explain the main differences, the strengths of each brand and which models are really worth a look. That way, you'll know exactly which folding e-bike suits your lifestyle.
Brompton vs Tern: summary
Although they belong to the same category, the two manufacturers have very different philosophies:
Brompton Electric
- Pure British product, made in London.
- World-renowned for its ultra-compact folded format.
- Ideal for urban commuters who want to take their bike everywhere: train, bus or office.
Tern e-bikes
- American brand, founded by former Dahon engineers.
- Known for its solid frames, powerful Bosch motors and great comfort.
- Designed for longer journeys and versatile use: with luggage, shopping or child seat.
In short: Brompton Electric is the king of compact and transportable, while Tern excels in power, comfort and range.
What are the technical differences?
| Features | Brompton Electric | Tern |
|---|---|---|
| Folded format | Ultra-compact: 65 × 58 × 27 cm | Largest: 86 × 68 × 41 cm |
| Weight | 15-17 kg (incl. battery) | 20-23 kg (incl. battery) |
| Engine | 250 W in front wheel | Bosch central motor (40-65 Nm) |
| Battery | 300 Wh, removable in bag | 400-500 Wh, frame-mounted |
| Autonomy | 30-70 km | 70-120 km |
| Behavior | Agile and fun in the city | Stable and comfortable, even over long distances |
Why choose a Brompton Electric ?
- Ultra-compact: even with battery, it fits under a desk or in a train compartment.
- Backpack battery: easy to remove, carry and recharge wherever you want.
- Handcrafted in London, with real attention to detail.
- Perfect for combined trips: train, metro, bus + bike.
Limitation: less power and range than a Tern, so less suitable for long distances outside town.
Why choose a Tern e-bike?
- Powerful Bosch central motor, up to 65 Nm torque.
- Large batteries (up to 500 Wh) → more autonomy.
- Sturdy frame and 20" wheels for a stable ride.
- Versatility: shopping, children, weekend outings.
Limitation: heavier and bulkier, not ideal if you have to carry it every day on the train.
Brompton Electric's flagship models
- 6 speeds, suitable for hilly terrain.
- Weight: approx. 18 kg.
- Range: up to 70 km.
- The compact urban bike par excellence.
- Lightweight: approx. 18 kg.
- 12 speeds, perfect for hilly terrain.
- Range: approx. 70 km.
- Just as compact, but more versatile.
Tern Vektron's flagship models
- Bosch Performance Line motor (65 Nm).
- 500 Wh battery → up to 120 km.
- 10 speeds.
- Comfortable in town and over long distances.
- Bosch Active Line motor (50 Nm), quieter and more economical.
- 400 Wh battery → 70 to 100 km range.
- 9 speeds.
- Ideal for daily commuting.
Conclusion: which one to choose?
- Opt for Brompton Electric if your priority is compactness and you often transport your bike by train or bus.
- Choose Tern Vektron if you're looking for comfort, power and autonomy, and if your trips are longer.
Both are excellent choices: it all depends on your use.
Frequently asked questions
What is the range of a Brompton Electric?
Which Tern is best for commuters?
The Tern Vektron Q9: quiet, reliable and perfect for everyday use.
Can you climb hills with a Brompton?
Yes, but with less power than a Tern. With a Bosch Performance Line motor, climbing is much easier.
Which is the lightest?
The Brompton, at 15-17 kg. The Tern is heavier, but also more stable.