What does the KETELES K820 Pro Electric Bike's 21-speed gearing add?

The 21-speed drivetrain provides three front chainring ranges and seven rear sprockets, giving more manual ratios than the seven-speed systems on many e-bikes. Use lower gears before a climb and ease pedal pressure during shifts. The extra front derailleur also adds another cable and adjustment point to keep clean and aligned.

Can the KETELES K820 Pro Electric Bike battery be charged indoors?

Yes. The 48V 17.5Ah down-tube battery is removable and lockable. Published charging times on the current manufacturer page conflict between 3–5 and 7–8 hours, so allow the longer window and use the charger's indicator rather than promising a fixed finish time. Refit the pack until it is secure and locked.

What rider fit and load should I check for the KETELES K820 Pro Electric Bike?

KETELES lists a recommended rider height of roughly 165–198 cm and a 200 kg load-capacity figure. Treat that load as the combined rider, luggage and accessories, and confirm the rear rack's separate rating before adding cargo. Riders near either height limit should check stand-over clearance, saddle range and reach.

Is the KETELES K820 Pro Electric Bike easy to assemble?

The KETELES K820 Pro 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 KETELES K820 Pro Electric Bike water resistant?

The KETELES K820 Pro 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.

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KETELES K820 Pro Electric Bike 250W 48V 17.5AH KETELES

KETELES K820 Pro Electric Bike

Motor

250W

Battery

48V 17.5AH

Speed

50 KM/H

Range

31–45 KM

€1.185,95 €936,95

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Klarna €312,32 ×3

Clearpay €234,24 ×4

PayPal €312,32 ×3

Finance

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

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From €78,08/mo 12 months at 0% interest Up to 24 months available

Product variants:

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Out of stock

This item is currently unavailable
Contact us for the latest restock estimate
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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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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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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 KETELES K820 Pro 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 KETELES K820 Pro 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 KETELES K820 Pro Electric Bike? Ask our team a question before ordering.

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TrailSurge Warranty+ BEST WARRANTY IN THE UK Stronger cover. UK support. Real help when you need it.

TrailSurge Warranty+

Extra protection, backed by our UK team

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.

UK-based fault support
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.

KETELES manufacturer warranty

Warranty period: 3 years on the frame and 1 year on original fitted parts from delivery.
What’s covered: Manufacturing defects affecting the frame, battery, motor, controller, charger, forks, brakes, display, lights and other original components. Approved cases are generally resolved with replacement parts.

Description

Quick Summary
The KETELES K820 Pro is a compact single-motor fat‑tyre e‑bike designed for everyday urban and trail riding. It's a versatile commuter that balances range and power in a user-friendly foldable package.

Smooth Power Delivery
The 250 W rear hub motor delivers steady pedal‑assist and throttle support, perfect for city streets or light trail use. Riders report smooth speed control and reliable performance across flat and rolling terrain.

Comfort & Control
Fat tyres and front suspension absorb bumps, offering confidence on uneven surfaces. Disc brakes provide reliable stopping power, and the Shimano 7‑speed drivetrain gives flexibility when accelerating or climbing.

Smart Battery System
A large 48 V 17.5 Ah removable battery ensures extended ride range. It locks to the frame and includes typical safety protections against over-charge and over-discharge for added peace of mind.

Tech You Can Trust
Full LCD display shows all key ride metrics—speed, distance, battery life, and assist level—making it easy to monitor performance and plan rides efficiently.

Built for Everyday Use
The folding frame allows for compact storage and transport. With its fat‑tyre stability, moderate weight, and reliable components, the K820Pro is a versatile option for daily commuting, errands, and casual off‑road fun.

Specifications

Collection	Electric Bikes
Brand	Keteles
Bike Type	Mountain
Motor Power	250W
Battery	48V 17.5AH
Top Speed	31 MPH
Acceleration Method	Regular Pedalling + Pedal Assist + Throttle Acceleration
Max Range	19-28 MILES
Charging Time	7-8 Hours

Shock Absorbers	Front
Wheel Size	29 x 2.1 Tyre
Brakes	Disc Brakes
Gears	Shimano 21-Speed
Bike Weight	38KG
Max Climb	15 degrees
Max Rider Weight	200KG
Dimensions

Close-up of a mountain bikes front suspension fork and rear shock absorber, highlighting metal brackets, shock components, and part of the blue bike frame with a black tire underneath.

250W Rear Hub Assistance

Powered by a 48V 250W brushless rear hub motor, the K820 Pro is built for smooth everyday riding with consistent assistance and a natural pedal feel when you want to keep it efficient.

Close-up of an electric bikes 23AH removable battery, showing its cell structure. Text highlights battery features, cycling modes, charging time (8–10 hours), waterproof material, and riding range (up to 42 miles).

48V 17.5AH Removable Battery

Removable 48V 17.5AH lithium battery designed for easy charging at home or work. The brand quotes around 30-45km of range per charge (usage dependent) with a typical 7-8 hour recharge time.

Close-up images of a bicycle’s front and rear wheels, each with a 48V 1000W brushless geared hub motor, disc brakes, and labeled text indicating the motor type and location.

Confidence on Mixed Terrain

29x2.1 tyres and front suspension help take the sting out of bumps, and disc brakes provide reliable stopping. Shimano 21-speed gearing gives you the cadence range for hills and flatter cruising.