Can such a large fat-tyre bike still fold?

Yes. Both the frame and handlebars fold, producing a stated folded footprint of around 93 × 64 × 75 cm. It is still a substantial 35 kg bike, so folding is more useful for storage and transport than carrying.

What surfaces is the FF20 Polar designed for?

Its 20 × 4.0-inch fat tyres, suspension fork and wide saddle are intended for mixed surfaces such as roads, gravel, sand, snow and rough tracks.

Is the FF20 Polar a standard e-bike for public-road use?

No. The HS model is L1e-B type-approved and reaches up to 45 km/h. It therefore sits outside the normal 25 km/h pedelec category, and local registration/licensing/insurance requirements should be checked.

Why does the FF20 Polar have two batteries?

The dual-battery setup is designed to provide much greater endurance than a conventional folding bike. FAFREES offers combined capacities of 24Ah or 26.8Ah, depending on the version.

Is the Fafrees FF20 Polar Electric Bike easy to assemble?

The Fafrees FF20 Polar Electric Bike arrives mostly assembled. Final setup normally includes aligning and securing the handlebars, fitting the pedals and completing essential safety checks. Allow approximately 20–30 minutes, or select our professional assembly and PDI service.

Is the Fafrees FF20 Polar Electric Bike water resistant?

The Fafrees FF20 Polar Electric Bike is not fully waterproof. Avoid prolonged exposure to heavy rain, and never submerge or pressure wash the bike or its electrical components. After riding in wet conditions, wipe the bike dry and store it in a dry, sheltered location.

Fafrees FF20 Polar Electric Bike – alternate product view

Fafrees FF20 Polar Dual Battery Fat Tyre Electric Bike

Certified

Fafrees FF20 Polar Electric Bike

SKU: FAF-FF20POLAR-20.8AH-MINT-GREEN

Motor

860W

Battery

48V 20.8AH

Speed

15.5 MPH

Range

71 MILES

£999.00 £949.00

In stock 12 sold this week

Klarna £316.33 ×3

Clearpay £237.25 ×4

PayPal £316.33 ×3

Finance

From —/mo 24, 36 or 48 months at 15.9% APR 6 or 12 months at 0% interest

Shop Pay

From £79.08/mo 12 months at 0% interest Up to 24 months available

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Choose your delivery option at checkout. Availability may vary by product, stock location and postcode.

Standard Home Delivery 3–5 working days

Our standard tracked home delivery service for most UK mainland orders.

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Click & Collect Collection from our Nuneaton workshop

Collect from our Nuneaton workshop

Collection is available by appointment from our Nuneaton workshop. The preparation time depends on where the product is currently stored. Contact us before ordering for the latest availability, or place your order and we will confirm when it is ready to collect.

Transfer required to Nuneaton Usually 5–7 working days

Products stored at another warehouse normally require 5–7 working days to reach our workshop. We will confirm as soon as the item is ready and arrange your collection appointment.

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Best Price Guaranteed

Seen the exact same product advertised for less? Send us the live offer before you order and we’ll check whether we can match it.

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The model, specification, colour, condition and delivery terms must be like-for-like
Marketplace or private sellers, used or clearance items, private codes, finance-only offers, bundle deals and obvious errors are excluded

Usually answered within 24 hours. Need a quicker answer? WhatsApp us or call 0800 099 6187.

Why Buy From TrailSurge? UK showroom, product support & aftercare

Buy your Fafrees FF20 Polar Electric Bike with UK-based support

TrailSurge is a UK retailer with a showroom and workshop in Nuneaton. Our team can help before you order and continue supporting you after your Fafrees FF20 Polar Electric Bike arrives.

UK-based customer support before and after your purchase
Showroom and workshop in Nuneaton
Help with product questions, setup, parts and aftercare
Tracked UK delivery with support if you need help with your order
Speak to a real member of our team before placing your order

Why buy through TrailSurge? For the best UK-based support and aftercare, we recommend buying through TrailSurge rather than ordering directly from overseas manufacturers or China-based sellers, where returns, warranty support and parts handling can be more difficult.

Need help with the Fafrees FF20 Polar Electric Bike? Ask our team a question before ordering.

WhatsApp Us Call Us 0800 099 6187

Road use notice: This bike is over 250W and is for private land/off-road use only. Need a UK road-compliant option? View road legal e-bikes .

Check your fit

Size & Rider Fit

Seat Height: 81–102 cm
Recommended Rider Height: 160–200 cm
Maximum Rider Weight: 150 kg
Handlebar height: 113–121 cm
Standover height: 42 cm

Good to know Folding step-through frame with a low 42 cm standover.

Trail Surge Warranty Plus FULL OFFICIAL WARRANTY INCLUDED UK-based support alongside the manufacturer warranty TRAILSURGE COVER 12 months

TWO LAYERS OF PROTECTION

More confidence after you buy

TrailSurge Warranty+ gives you a direct UK warranty alongside the product’s manufacturer warranty.

01 TRAILSURGE WARRANTY +

12 months of TrailSurge support

UK-based fault support
Battery, motor and frame fully covered.
Repair, parts or another suitable solution where eligible

02 Fafrees WARRANTY

Manufacturer warranty period See product details

Manufacturer cover

Manufacturing defects within the applicable warranty period.

Typical component protection Eligible faults affecting the frame and forks, motor and drive system, controller, battery and BMS, charger, wiring, display, gears, brakes and factory-fitted controls.

Description

500W rear hub motor | 48V 20.8Ah dual battery | Up to 115 km manufacturer range | Folding frame | 20×4.0-inch tyres

The Fafrees FF20 Polar Dual Battery Electric Bike is a folding fat-tyre e-bike with a 48V dual-battery system, 500W rear hub motor and 20×4.0-inch tyres.

With approximately 998Wh total battery capacity, 65Nm of torque, front suspension and Shimano 7-speed gearing, the FF20 Polar is built for extended leisure rides, commuting and mixed terrain where range matters.

Fafrees FF20 Polar Electric Bike Features

500W rear hub motor
48V 20.8Ah dual battery
Up to 115 km manufacturer range
Folding frame
20×4.0-inch tyres

FF20 Polar Dual Battery Electric Bike Specifications

Motor: 48V 500W sustained / 860W peak rear hub motor, 65 Nm
Battery: 48V 20.8Ah dual-battery system, approx. 998Wh total
Top speed: 25 km/h
Range: Approx. 95–115 km
Brakes: Mechanical disc brakes
Gears: Shimano 7-speed
Tyres: 20 × 4.0 in Chaoyang
Suspension: 40 mm front suspension fork
Bike weight: 34 kg
Maximum load: 150 kg
Recommended rider height: 160–200 cm
Charging time: Approx. 8 hours

UK road-use note: This configuration exceeds the standard UK EAPC 250W continuous-power limit. Public-road use is subject to applicable vehicle approval, registration, tax, insurance, licensing and motorcycle-helmet requirements.

Range and performance figures are manufacturer estimates. Actual results vary with rider weight, terrain, weather, tyre pressure, load and assistance level.

Specifications

Collection	Electric Bikes
Brand	Fafrees
Bike Type	Folding dual-battery fat-tyre electric bike
Motor Power	860W
Battery	48V 20.8AH
Top Speed	15.5 MPH
Max Range	71 MILES
Max Rider Height	160–200 cm
Charging Time	Approx. 8 hours

Shock Absorbers	40 mm front suspension fork
Wheel Size	20 × 4.0 in Chaoyang
Brakes	Mechanical disc brakes
Gears	Shimano 7-speed
Bike Weight	34 kg
Max Rider Weight	150 kg
Dimensions

Foldable Fat-Bike Design

Despite its substantial 20 × 4.0-inch tyres and 35 kg weight, both the main frame and handlebars fold. This makes storage and vehicle transport easier than with a fixed-frame high-speed fat bike.

45 km/h L1e-B Certification

FAFREES classifies the Polar HS as an EU L1e-B type-approved vehicle, capable of speeds up to 45 km/h rather than the 25 km/h limit of a standard pedelec.

Dual-Battery Long-Range System

The FF20 Polar HS uses a dual-battery configuration totalling 24Ah or 26.8Ah, providing up to 1152Wh or 1286.4Wh of energy and a manufacturer-listed range extending as high as 130 km depending on version.