Fiido M21 Folding Electric Bike



The Fiido M21 is an improved version of the powerful Fiido M1 Pro fat tyre folding e-bike. It has a new torque sensor for perfectly smooth pedal assistance. This enables more precise and natural control of the motor power. The M21 is powered by a strong 500W motor paired with a 7-speed gear set. It can reach speeds of up to 25mph and is capable of taking on any terrain. The 20x4inch wheels have ultra-wide rims with all-terrain fat tires.

The M21 has full suspension for a smooth riding experience whether on a dirt track or a rocky trail. The removable 48V battery of this bike enables rapid acceleration and a maximum range of 80miles on a single charge (in pedal-assist mode). This means you can ride long distances without worrying about the battery level. A full charge from empty takes 9 hours.

Free Mudguards Included

Vive Scooters UK is an authorized dealer for FIIDO in the United Kingdom.

Legal Disclaimer

You can ride an electric bike in the UK if you’re 14 or over, as long as it meets certain requirements. Bikes that do not meet these requirements are not allowed to be ridden on UK roads, cycle paths or footpaths.
We are unable to comment on the enforcement of these rules and cannot offer legal advice. The customer assumes all liability and risk associated with the use of electric bicycle products purchased from this website.

More information on UK electric bike rules can be found on the website.


Important Notice

With the exception of "Click & Collect" and "Same Day Delivery" orders, this bike will be delivered packaged in a box.
There is a possibility that you may need to make minor mechanical adjustments such as aligning the brake callipers and handlebars. You will also need to attach the pedals. All of the required tools and instructions are included in the box. If you are not comfortable with making such adjustments, you can take the bike to be serviced at a local bike shop, or opt for the "Click & Collect" or "Same Day Delivery" options at checkout if you are local to our London store.

  • Works related to adjustment and assembly are not covered under the warranty.
  • Please read the manual and observe the safety information included before riding the bike.

Operating Temperature: -10°~50°℃

Maximum Speed: 40km/h

Battery: high-quality 48V 11.6Ah Li-ion battery

Charging Time: 9 hours

Pedal Assist Mode Range (Reference): 80miles (130km)

Frame Material: Aluminium Alloy

Chain: KMC Z7

Grips: Rubber

Tyre Size: 20×4.0 inch

Net Weight (KG): 25KG

Saddle Height: 80cm~110cm

Folded Size: 96cm*45cm*79cm

Unfolded Size: 172cm*26cm*106cm

Recommended Rider Heights:5'2" ~ 6'4"

This bike is not eligible for Cycle to Work schemes.


This e-bike is covered by our Fiido Warranty Policy. You will need to register your warranty within 15 days from delivery of the product.

fiido authorised dealer

Customer Reviews

Based on 9 reviews
David Bromby
Fiido M21

Great bike. Easy to put together. Love it

Steve Liszka
Great service, great bike!

I bought the Fiido M21 and it's an absolute beast! Loads of power and looks the business. I've been commuting a 20 mile round trip (with throttle) and it uses about half of the battery. Also taken it over the South Downs on some steep hills and it's dealt with everything I thrown at it so far. Vive were very helpful when the bike was a couple of days late. Couldn't have asked for better customer service! Highly recommended.

Fantastic bike

I'm new to electric bikes and this one ticked all the boxes for my requirements. I was a bit dubious that the build quality might be a little suspect at the price but it is good. I had also read that the brakes were not good, no issue there either.

I have completed a few trips out now and no problems, the torque sensor is worth a special mention, it is pleasure to pedal!

I did nip into a local bike shop for a rear view mirror and some chap was buying a saddle for £500 (I checked on the web when I got home, thought I'd misheard the price) and for less than three time that he could have bought one of these!

I have let two long term electric bikes using friends have a go and they both returned grinning like Cheshire cats with an exclamation of "That's mad!".

nicholas bugg
Fiido M21 bike

This bike is epic!Have been on road off road and have no complaints!Battery life is great and after sales service is fantastic.5 stars ⭐️

Mike Bates
Fiido M21

Bought a couple of these for me and the wife and I can honestly say they are brilliant fun and very well made. Couple of minor issues, when folded the handlebar doesn't fold as close as it could due to the speed controller resting on the top of the forks, also the clip on lights underneath the saddles both snapped a lug on one side on installing. Decided to change the saddles anyway as I'm not sure who's backside they were designed to fit but they were obviously not human!! I can forgive these minor issues as they really are a great bit of kit, especially after doing the trick shown on YouTube!
Many thanks vive scooters, superb service

We're here for you in case things go wrong

All our new E-Scooters and E-Bikes come wih UK warranties. We have a Servicing & Repair workshop in London, UK. We provide free after-sales technical advice.

We don't waste any time

All our stock is located in and ships from the UK. We dispatch all orders within 1 Working Day (except custom built and pre-order products. If your goods arrive faulty, you can return them for a hassle free refund.

Support British Business

We are a UK based registered company. All our prices include VAT and we provide tax invoices.


Electric scooters are not to be used on UK cycle lanes, footpaths or roads. You can ride an electric bike in the UK if you’re 14 or over, as long as it meets certain requirements. Bikes that do not meet these requirements are not allowed to be ridden on UK roads, cycle paths or footpaths. The customer assumes all liability and risk associated with the use of electric scooter and electric bicycle products purchased from this website.
Fiido M21 Folding Electric Bike
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