Fafrees FF20 Polar Fat Tire Folding Electric Bike
SKU: D90065In Stock
SPEED15.5 Mph
RANGE59 Miles
MOTOR500W
BATTERY20.8Ah
CHARGING8 Hours
WEIGHT75 lbs
Adjustable Cycle Helmet£38.99
Front and Rear Light Set£44.99
Private Land Use Only.
Not for public roads, pavements or cycle paths. Its motor and assisted top speed are above the UK EAPC limits of 250W and 15.5 mph, which makes it a motor vehicle in law. It would need registration, insurance and a licence. Ride it on private land.
See UK LegislationThis bike is built for riders 5'3"-6'7" (160-200 cm).
Kept in this browser only.
The manufacturer's figures, not ours.
This one carries 998 Wh of battery. The maker quotes 59 mi; in mixed riding with some hills, expect nearer 44 mi. A full charge costs about £0.28. Across a year that is roughly £980.00 less than making the same journeys by car, so the bike pays for itself in about 15 months. Everything here is worked out from this bike's own specification. Estimates, not promises: the assumptions are printed underneath.
Range you can expect
| Low assist, flat roads | 59 mi |
|---|---|
| Mixed riding, some hills | 44 mi |
| Full assist, loaded or hilly | 32 mi |
| Riding time on a charge | 3 h 49 min |
What it costs to run
| A full charge | £0.28 |
|---|---|
| Every 100 miles | £0.47 |
| Electricity for a year | £10.00 |
| The same year by car | £990.00 |
| You keep | £980.00 |
| Pays for itself in | 15 months |
Worked out from the specification
| Battery energy | 998 Wh |
|---|---|
| Energy per mile | 16.9 Wh |
| Charger output | 2.6 A |
| Power to weight | 14.7 W/kg |
| You can carry | 331 lb |
Based on £0.245 per kWh, £0.45 per mile to run a small car, and 2,200 miles a year. Charging is costed at the socket, not at the battery.
Two batteries, sixty five newton metres, and it folds
The Fafrees FF20 Polar carries 998 Wh across a split pack with 65 Nm of torque and an 860 watt peak, at £1,164.
At 500W it sits outside the UK road rules, so we sell it for private use on private land. Please read the panel above before you order.
Where you can and cannot ride it
The limit is 250W continuous and 15.5 mph of assistance. This is 500W sustained with 860 watts available at peak.
It belongs on your own property, or on land where the owner has given you permission. On a road or a cycle path it would need registration, tax, insurance and a licence.
The pack is split in two, which is the interesting part
Fafrees give the battery weight as 3.1 plus 3.65 kilograms: two units rather than one brick.
A split pack is easier to carry indoors, easier to store, and means a failure takes out half your range rather than all of it. Nearly twenty one amp hours is a large battery however it is packaged, and this is the sensible way to package it.
Sixty five newton metres
Higher than the F20 Max we also list, on the same 500W rating, and with 860 watts of peak against its 690.
Torque is what pulls a seventy five pound bike away from a standstill and up a slope with a load on. If you are choosing between the two Fafrees folders, this is the one with the muscle and that one is the one with the range.
Ninety five to a hundred and fifteen kilometres
Fifty nine to seventy one miles, from the 998 watt hour pack, removable for charging indoors. Eight hours from empty on the supplied 3 amp charger.
The panel below turns the capacity into energy per mile and gives the bands, which is the version to plan around when you are using 860 watts of it.
Certified to three standards
EN15194, CE and E-Mark, with an IPV4 water rating and a 3.5 inch IPS colour display rated IP65.
An IPS panel is readable at an angle and in daylight, which sounds like a small thing until you are looking at a washed-out screen with the sun behind you.
Rack, mudguards and kickstand included
The parts you would otherwise buy in the first month, fitted from the factory.
- Shimano seven speed with a trigger shifter, 14 to 28 cassette
- Chaoyang 20 by 4 inch tyres on 36 hole double wall rims
- Front and rear lights with a brake light
- A suspension fork with 40 mm of travel
- Folded to 93 by 64 by 75 centimetres
Who it fits
Fafrees size it for riders between 160 cm and 200 cm, which is 5ft 3in to 6ft 7in, with a 42 cm standover and the saddle running from 81 to 102 cm.
That is a wide fit range, and the low standover makes getting on and off easier than the frame shape suggests.
Three hundred and thirty one pounds carried
A hundred and fifty kilograms rated, above the middle of our catalogue, on a bike that already weighs seventy five pounds.
You wheel it rather than carry it. Folding gets it into a car boot, not up a flight of stairs.
Before the first ride
It arrives folded with a charger and a manual.
- Unfold and lock the frame and the handlebar, then check both
- Set the saddle between 81 cm and 102 cm
- Set tyre pressure: soft for grip, firmer for range
- Check both brakes before using the power
- Charge to full before the first long ride
Mechanical brakes, and a cadence sensor
Disc brakes on 160 mm rotors, cable operated, and a cadence sensor rather than a torque sensor. Fafrees also state the fork has no lockout.
All three are honest omissions at this price rather than hidden ones, and the cables are serviceable anywhere for the price of a set of pads. But on a seventy five pound bike with 860 watts available, hydraulics would be the upgrade worth making first.
Buy it for the split battery, the 65 newton metres and the fact that everything you would otherwise add is already on it.
- BRAND
- Fafrees
- CATEGORY
- Fat Tire
- MOTOR POWER
- 500W
- RANGE
- 59 Miles
- SPEED
- 15.5 Mph
- BATTERY
- 20.8Ah
- WEIGHT
- 75 lbs
- CHARGING TIME
- 8 Hours
- BRAKE SYSTEM
- Mechanical disc brakes
- FRAME MATERIAL
- 6061 Aluminum Alloy
- MAXIMUM LOAD
- 331 lbs
- INPUT VOLTAGE
- 48V
- TIRE SIZE
- 20 inch
- TORQUE
- 65 Nm
The Fafrees FF20 Polar Fat Tire Folding Electric Bike states 500W, 59 Miles and 15.5 Mph, and below it is set against the DYU FF500 20 Inch Fat Tire Folding Electric Bike. Every figure the two disagree on is marked. Choose a different bike to compare it with whichever one you are also considering.
6 of 12 specifications differ. View DYU FF500 20 Inch Fat Tire Folding Electric Bike
- Is the FAFREES FF20 Polar foldable?
- Yes, it features a foldable frame for easy storage and transportation.
- Are the fat tires suitable for all-terrain riding?
- Yes, they provide excellent traction, stability, and comfort on various surfaces.
- Does the FAFREES FF20 Polar offer long battery range?
- Yes, it is designed for extended riding distance and dependable daily performance.
- Is the FAFREES FF20 Polar suitable for commuting and leisure rides?
- Yes, it combines comfort, efficiency, and versatility for both everyday travel and outdoor adventures.
- Are the electric bikes brand new?
- Yes. All electric bikes sold by BikTron are brand new, factory-sealed, and sourced directly from authorised manufacturers and official distributors.
- How do I choose the right electric bike for me?
- Pick a bike based on how you plan to ride. City bikes are great for commuting, folding bikes work well if you need compact storage, mountain bikes handle hills and mixed terrain, and cargo bikes are ideal for carrying shopping or loads. If you are not sure, our Bike Quiz can help.
- Are the batteries original and certified?
- Yes. Every electric bike battery is brand new and original from the manufacturer, with full safety certification and performance testing.
- Are the bikes tested before shipping?
- Yes. Each e-bike goes through a quality check before dispatch, covering electronics, brakes, motor response, and battery performance.
- Do electric bikes come with a warranty?
- Yes. All electric bikes from BikTron include a manufacturer warranty. Duration depends on the brand and model. Most bikes include a 12-month warranty as standard.
- How long does delivery take?
- Standard UK delivery usually takes 2 to 7 business days. Remote areas may take a little longer. You will receive a tracking link by email once your order is dispatched.
- Which payment methods do you accept?
- We accept Visa, Mastercard, PayPal, Apple Pay, Google Pay, and Klarna buy-now-pay-later. All payments are processed securely.
- Can I return my electric bike?
- Yes. You can ride the bike and still return it. Tell us within 30 days of delivery and we book the courier and collect it from your door. Contact us first and we will guide you through the process.
- Do the bikes need assembly?
- Most electric bikes arrive 85 to 90 per cent pre-assembled. You will usually need to attach the handlebars, pedals, and adjust the seat. A basic tool set is often included.
- Are BikTron electric bikes legal to ride in the UK?
- Yes. All bikes sold by BikTron that meet UK EAPC rules (250W motor, max 15.5 mph assisted speed, pedal-assisted only) are fully road-legal. You do not need a licence, tax, or insurance to ride them on public roads. Riders must be at least 14 years old.
- What about the electric scooters?
- Those are different, and the law treats them differently. A privately owned e-scooter cannot legally be ridden on a public road, pavement or cycle lane in the UK, whoever sold it. We sell ours for private land use only, with the landowner's permission, and every scooter product page says so. If you want something you can ride to work, choose an electric bike.
Secure checkout and fast UK delivery on every order.
- Free standard UK delivery on most bikes — 2 to 7 business days
- Express delivery may be available on request
- Full tracking included with every order
- Pay securely with Visa, Mastercard, PayPal, Apple Pay, Google Pay, or Klarna
- 0% finance available through Klarna at checkout
Before you order:
- Delivery is to UK mainland addresses — some remote areas may have a small surcharge
- Most bikes arrive 85–90% pre-assembled and include basic tools for setup
- If you are unsure about sizing or specs, contact us before you buy
Full details at Payment & Shipping.
Simple and fair terms so you can buy with confidence.
- 30-day return window — if the bike is not right for you, send it back
- Ride it. It needs to come back clean, undamaged and complete, with the charger, tools and manual
- A refund or replacement is issued after we receive and check the return
Please note:
- For a change of mind we book the collection and deduct its cost from your refund, and we tell you the amount before we book it
- If we sent the wrong item or it arrived faulty, we cover return shipping in full
- All bikes include a 12-month manufacturer warranty as standard
Full details at Returns & Refunds and Warranty.
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