The most interesting feature, though, is that the battery is in the seat tube. Quite what effect this has on balance is something we’ll find out when we review the bike in a few weeks' time, but it has one immediate advantage: you can remove it for charging. If there’s a disadvantage, it’s that the power connection to the bike is external, so you have to live with the curly wire trailing behind the tube. (Cables aren't shown in Fiido's renders, such as the one below, but you can see there is a rear light built in, too.)

Fiido D11

The other remarkable specification is the weight: at a claimed 12.9kg it’s one of the lightest electric bikes around, and barely heavier than most electric scooters.

With a capacity of 11.6Ah, the company says it gives the D11 a range of 100km (around 60 miles). That’s in ideal conditions of course and, likely, in the minimum assistance mode, of which there are three, selectable on the handlebar display.

There are no mudguards, but you do get a kickstand.

Fiido D11

Fiido is putting the D11 on Indiegogo where you’ll be able to buy it from 20 June onwards. It’s offering up to 38% off the RRP of $1299.99 (around £1018), which brings the price down to $805.99  (around £631).

Even at the full price, the specs look pretty good. Here are some of the key details of the D11:

  • Wheel size: 20x1.75inch
  • Tyres brand: CST
  • Motor: 250W brushless
  • Sensor: Cadence
  • Speed Gear: Shimano 7-speed
  • Battery: 36V 11.6Ah lion battery (in the seat tube)
  • Assisted range: Up to 100km
  • Brakes: Mechanical Disc Brakes
  • Weight: 12.9kg
  • Frame: Aluminium Alloy
  • Speed: Limited to 25km/h/15.5mph
  • Folded Size: 84x40x59cm
  • Unfolded size: 148x57x110cm

Fiido D11

At this price, it’s not a surprise that Fiido uses a cadence sensor to detect when you’re pedaling rather than a torque sensor. The latter is usually found in more expensive bikes and delivers motor power based on how hard you’re pushing the pedals. A cadence sensor, by contrast, only detects whether you’re pedaling or not, so can’t know how much power to apply, which is why more expensive bikes tend to offer smoother power delivery.

Check out our roundup of the best electric bikes.