DYU M20 2.0 Fat Tyre Electric Bike – 250W, 48V 18.2Ah

The DYU M20 2.0 is a 250W fat-tyre electric bike with genuine motorbike styling — a long tan bench saddle, 20 x 4.0-inch tyres and an aluminium alloy frame. £789.99, down from an RRP of £999, with free delivery from £50 to England, Scotland and Wales.

Held in UK stock, so there's no import wait and no customs charge when it arrives — typically 3–5 working days, often faster.

How fast does it go?

Assistance cuts out at 25km/h (15.5mph), which is the UK legal limit for an electrically assisted pedal cycle. You can pedal faster than that under your own effort — the motor simply stops helping once you pass it.

How far will it go on a charge?

The 48V 18.2Ah battery gives an estimated 50–80km (31–50 miles) per charge. That's a large battery for a 250W bike, and it's the main reason the M20 covers more ground than most fat-tyre models at this price.

Where you land in that range depends on how much you pedal, plus hills, headwinds, cold weather, tyre pressure and rider weight. Riding on throttle alone sits at the lower end; pedal assist gets you towards the top.

How long will the battery last?

The 48V 18.2Ah pack stores around 874Wh. As a general guide for lithium-ion e-bike batteries, expect several hundred full charge cycles — typically in the region of 500–800 — before capacity noticeably drops. For most riders that's several years of regular use.

You'll get more from it by charging indoors rather than in a freezing shed, avoiding leaving it completely flat or sitting at 100% for weeks, and letting it reach room temperature before charging after a cold ride.

Is it road legal in the UK?

Road-use compliance has not been verified for the exact supplied configuration. A 250W rating and 25km/h setting alone are insufficient: throttle behaviour, maximum continuous motor rating, selectable modes and any required vehicle approval must also be checked. Do not use this bike on public roads or cycle paths as an ordinary EAPC unless those requirements are confirmed.

It offers a pure-power (throttle) mode alongside pedal assist, and throttle operation is the one area where legality depends on the delivered configuration. Check the current GOV.UK EAPC rules before riding on public roads.

Who is it for?

The M20 offers a moped-style silhouette, a long saddle and a large battery. Its pure-power throttle mode means road-use compliance must be verified; it is not represented as a confirmed road-use EAPC.

The 20 x 4.0-inch fat tyres add grip on wet roads, gravel, grass and loose ground, and combined with front fork and seat post suspension they take the edge off rough surfaces. At 38.8kg it's substantial but still manageable, and the adjustable seat post means it suits a range of rider heights.

Specifications

Range figures are supplier estimates rather than guarantees.

Will it fit me, and can I move it?

At 38.8kg the M20 is heavier than a standard bike but lighter than an electric dirt bike — one person can move it, though lifting it up stairs is awkward. The adjustable seat post covers a reasonable range of rider heights. Check you can get both feet down comfortably before riding.

Delivery and returns

• Free delivery from £50 to England, Scotland and Wales from UK stock — typically 3–5 working days, often faster.
• 12-month warranty.
• 14-day right to cancel under the Consumer Contracts Regulations 2013, plus your full rights under the Consumer Rights Act 2015.
• Sold by Horizon and Co Solutions Ltd, a UK registered company (No. 16942003, England and Wales).

Compare before you buy

For other fat-tyre options, see our best fat tyre electric bikes UK 2026 round-up or compare the Aairsk X5 and Hidoes HD-F3. Browse all 250W electric bikes, or read our fat tyre vs standard comparison if you're unsure which suits you.