Is the saddle adjustable like a normal bicycle?

No. The Ultra HS uses an extended moto-style saddle rather than a conventional adjustable bicycle saddle. FAFREES lists its seat height at approximately 84 cm.

Is it comfortable on rough terrain?

It is one of the most heavily suspended bikes in the range, combining large fat tyres with a 100mm hydraulic front fork and rear suspension for rough roads and mixed surfaces.

Why does the F20 Ultra HS use such wide tyres?

Its enormous 20 × 5.0-inch tyres provide a large contact patch for stability and grip, matching the bike's heavier, higher-powered moped-style design.

Is the F20 Ultra HS a normal 25 km/h electric bicycle?

No. It is a high-speed model capable of up to 45 km/h and FAFREES classifies it as an L1e-B type-approved vehicle, rather than a conventional EN15194 pedelec. Road-use requirements can therefore differ by country.

Is the Fafrees F20 Ultra HS Electric Bike easy to assemble?

The Fafrees F20 Ultra HS 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 F20 Ultra HS Electric Bike water resistant?

The Fafrees F20 Ultra HS 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 F20 Ultra HS High Speed Fat Tyre Electric Bike

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Fafrees F20 Ultra HS High Speed Fat Tyre Electric Bike – product image 2

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Fafrees F20 Ultra HS High Speed Fat Tyre Electric Bike – product image 3

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Fafrees F20 Ultra HS High Speed Fat Tyre Electric Bike – product image 4

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Fafrees F20 Ultra HS High Speed Fat Tyre Electric Bike – product image 5

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Fafrees F20 Ultra HS Electric Bike

Motor

1200W

Battery

48V 25AH

Speed

28 MPH

Range

62 MILES

£1,899.00

In stock 11 sold this week

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

Buy your Fafrees F20 Ultra HS 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 F20 Ultra HS Electric Bike arrives.

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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 F20 Ultra HS Electric Bike? Ask our team a question before ordering.

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For the first 12 months, TrailSurge Warranty+ gives you direct UK support on eligible faults affecting the main factory-fitted components — with practical help to get you back up and running.

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Major factory-fitted components covered
Repair, parts or another suitable solution where eligible

Typical component cover: Eligible faults affecting major factory-fitted components, including the frame and forks, motor and drive system, controller, battery and BMS, charger, wiring, display, gears, brakes, and factory-fitted sensors or controls.

Fafrees manufacturer warranty

Warranty period: Please see the product description for the current manufacturer warranty term.
What’s covered: Manufacturing defects within the applicable warranty term.

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 .

Description

750W sustained motor | 48V 25Ah LG battery | Up to 45 km/h manufacturer speed | 20×5.0-inch tyres | 100 mm suspension

The Fafrees F20 Ultra HS Fat Tyre Electric Bike is a motorcycle-inspired high-speed e-bike with a 750W continuous motor, 48V 25Ah LG battery and ultra-wide 20×5.0-inch tyres.

With up to 79Nm of torque, 100mm front suspension and Shimano 7-speed gearing, the F20 Ultra HS is built for riders seeking strong performance, large battery capacity and fat-tyre stability.

Fafrees F20 Ultra HS Electric Bike Features

750W sustained motor
48V 25Ah LG battery
Up to 45 km/h manufacturer speed
20×5.0-inch tyres
100 mm suspension

F20 Ultra HS Fat Tyre Electric Bike Specifications

Motor: 48V 750W sustained / 1200W peak rear hub motor, 79 Nm
Battery: 48V 25Ah LG removable lithium-ion, 1200Wh
Top speed: Up to 45 km/h
Range: Approx. 80–100 km
Brakes: Hydraulic / mechanical disc brake configuration
Gears: Shimano 7-speed
Tyres: 20 × 5.0 in Chaoyang
Suspension: 100 mm hydraulic front suspension with lockout
Bike weight: 40 kg
Maximum load: 130 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	High-speed fat-tyre electric bike
Motor Power	1200W
Battery	48V 25AH
Top Speed	28 MPH
Max Range	62 MILES
Max Rider Height	160–200 cm
Charging Time	Approx. 8 hours

Shock Absorbers	100 mm hydraulic front suspension with lockout
Wheel Size	20 × 5.0 in Chaoyang
Brakes	Hydraulic / mechanical disc brake configuration
Gears	Shimano 7-speed
Bike Weight	40 kg
Max Rider Weight	130 kg
Dimensions

Dual Suspension System

A 100mm hydraulic front suspension fork is paired with a rear shock, helping control impacts and reduce fatigue on longer journeys. This makes the Ultra HS much more comfort-oriented than a conventional rigid commuter bike.

20 × 5.0-Inch Extra-Wide Fat Tyres

Massive 5-inch tyres give the Ultra HS a particularly wide contact patch, improving stability and grip on rough roads and mixed terrain while complementing its heavier moped-style chassis.

45 km/h Type-Approved Performance

The F20 Ultra HS is designed as a high-speed vehicle rather than a standard 25 km/h pedelec. FAFREES lists it as EU L1e-B type-approved, with a 750W sustained motor, up to 1200W peak output and 79Nm torque.