Ebike Oracle

Review · ASKGO

mountain8.1/10

ASKGO Dirt 5500

By John WeeksUpdated Aug 31, 2026How we score

Spec-verified against the manufacturer listing

Our verdict

8.1
/ 10

A 5500 W peak, 40 mph electric dirt bike with a 1,440 Wh pack, hydraulic rear brake, a 7-speed drivetrain and a three-year warranty for $679.99. As off-road hardware per dollar it is remarkable. As an e-bike it does not exist: 40 mph is not a bicycle in any US state, and Amazon listing it under Electric Road Bikes is a categorisation error, not a legal opinion.

Best for
Private land, OHV trails and tracks where a 40 mph machine is permitted

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ASKGO Dirt 5500

At a glance

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Motor
5500W
Battery
1440Wh
Range
55mi
Top speed
40mph

The numbers

ASKGO Dirt 5500 is a electric mountain bike that scores 8.1/10 on our editorial rubric, last verified on August 31, 2026. Amazon lists it at $680 right now. On Amazon it currently ranks #1 Best Seller in Electric Road Bikes. It pairs a 5,500 W hub motor and a 1,440 Wh battery, good for a claimed range of up to 55 miles and assisted speeds up to 40 mph. It best suits private land, OHV trails and tracks where a 40 mph machine is permitted.

Pros

  • + 1,440 Wh battery (48 V x 30 Ah), the largest in the ASKGO range by half
  • + Rear hydraulic brake at $679.99, where mechanical discs are the norm
  • + Front hydraulic fork plus a heavy-duty mid-shock, and a 7-speed drivetrain
  • + Three-year warranty, triple the ASKGO norm
  • + The 100-mile claim is arithmetically sane at 14.4 Wh/mi

Cons

  • - 40 mph is not a bicycle in any US state, no settings change fixes that
  • - Amazon lists it under Electric Road Bikes, which is a categorisation error
  • - No rated wattage published, so no compliance story exists even in principle
  • - No UL certification named, on the largest battery in the range
  • - No published weight, and it will not be light

Who is this for?

  • Private land, OHV trails and tracks where a 40 mph machine is permitted
  • Riders who want dirt-bike capability without a dirt-bike budget
  • Anyone who already understands this is not road-legal and wants it anyway

The 30-second verdict

Buy this if you want a cheap electric dirt bike and you have somewhere legal to ride it. $679.99 buys a 5500 W peak motor, a 48 V x 30 Ah (1,440 Wh) pack, a front hydraulic fork with a heavy-duty mid-shock, a rear hydraulic brake, a professional 7-speed drivetrain, knobby off-road tyres and a three-year warranty, triple what most of this tier offers. Almost nothing at this price is specified this seriously.

Do not buy it as an e-bike, because it is not one.

Why we are blunt about the class question

The US three-class framework tops out at Class 3: 28 mph, pedal-assist only in most states. This bike advertises 40 mph and has a throttle. There is no state where that is a bicycle, no settings change that makes it one, and no rated-wattage figure on the listing that could bring it inside the definition. Amazon has it filed under Electric Road Bikes and it charted #1 there, which tells you something about Amazon's categories and nothing about the law.

What it actually is: an off-road machine. On private land, on OHV trails where your state permits them, and at tracks, it is a lot of capability for the money. On a public road or bike path it is an unregistered motor vehicle, and the consequences of being stopped on one are not a citation about bicycle equipment.

The hardware is genuinely good

A rear hydraulic brake at $680 is unusual, most bikes twice this price use mechanical discs front and rear, and hydraulics are the single biggest safety upgrade available at speed. The 1,440 Wh pack is the largest in the ASKGO range by 50%, and the 100-mile pedal-mode claim works out at 14.4 Wh per mile, which is optimistic but arithmetically sane. Plan on 50-60 miles at realistic throttle use. The 3-year warranty is three times the ASKGO norm and six times what most Amazon-native brands offer.

What it gives up

No rated wattage is published, so there is no compliance story even in principle. No weight is published, and a 1,440 Wh pack with a steel off-road frame will not be light, assume you are not carrying this up stairs. The front brake is a standard disc rather than hydraulic, an odd asymmetry. And it names no UL certification, which matters more than usual on a pack this large if you charge it indoors.

ASKGO Dirt 5500

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Frequently asked questions

Is the ASKGO Dirt 5500 street legal?

No, and not in any US state. It advertises 40 mph with a throttle. The three-class framework tops out at Class 3, 28 mph, pedal-assist only in most states. A 40 mph throttle vehicle is not a bicycle under any state definition, and no display setting changes that. Amazon files it under Electric Road Bikes; that is a shelf, not a legal classification. Ride it on private land or where your state permits off-highway vehicles. Check what your state actually says on the street-legal-by-state guide.

Is it really faster than a Class 3 e-bike?

By a wide margin. Class 3 caps at 28 mph; this claims 40 mph, which is roughly 43% faster and a completely different amount of kinetic energy in a crash. That is why the hydraulic rear brake matters here and would be a luxury elsewhere.

Will it do 100 miles?

Not at speed. The claim is 100 miles in pedal mode from a 1,440 Wh pack, which is 14.4 Wh per mile, optimistic but not impossible for light pedal-assist use. At meaningful throttle on a 5500 W motor you will see a fraction of it. Plan on 50-60 miles mixed, and far less if you use the performance you paid for.

What if I want something this capable that is actually legal?

Then you want a different bike, because capability at this level and US road-legality are mutually exclusive. For legal fast riding, a Class 3 pedal-assist bike caps at 28 mph, and in seven states (DC, Kentucky, Massachusetts, Montana, North Carolina, Pennsylvania and South Carolina) even Class 3 is banned. Our street-legal picks only include bikes that fit the framework.

ASKGO Dirt 5500

Bottom line

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