GREATWORK M8 Dual Motor Fat Tire Electric Bike: Can It Really Hit 45 MPH?

A powerful off-road beast with dual 5000W motors and 100-mile range for under $900, perfect for adventure riders who have storage space and want maximum performance, but too heavy and fast for city commuters.

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Key Specifications

Motor
5000W peak (dual 2500W motors)
Weight
82

Best For

How this e-bike scores for different riding styles

High Performance
98/100

Peak 5000W dual motors, 45 MPH top speed, 1300 Wh battery, and 180 N·m torque deliver exceptional performance. This ranks among the most powerful e-bikes available, ideal for speed enthusiasts and extreme terrain.

Off-Road Adventure
95/100

Dual 2500W motors with 40° climbing capability, 26x4.0 fat tires, dual suspension, and 330 lb weight capacity make this exceptional for trails, mountains, and all-terrain riding. UL certified for safety on demanding terrain.

Recreational Leisure
78/100

Cruise mode, walk mode, 7-speed gearing, and comfortable fat tires provide excellent leisurely riding experience. However, the heavy weight and aggressive performance specs are overkill for casual beach or neighborhood cruising.

Daily Commuting
72/100

The 100-mile PAS range and 45 MPH speed make it viable for long commutes, but the 82 lb weight and non-foldable design limit practicality for multi-modal transport. The high speed exceeds legal limits for bike lanes in most areas.

Cargo & Utility
70/100

The 330 lb max weight capacity and rear rack support cargo hauling, and dual motors handle heavy loads easily. However, no specific cargo features like panniers or extended racks limit dedicated utility applications.

Compact & Portable
15/100

At 82 lbs with no folding capability and 75.2-inch length, this bike is the opposite of portable. Not suitable for apartments, public transit, or compact storage needs.

Our Verdict

The GREATWORK M8 is a beast of an electric bike that focuses on raw power and adventure capability. With dual motors pumping out 5000W peak power, this bike rockets to 45 miles per hour and climbs steep 40-degree hills like they're nothing. The massive 1300 Wh battery is one of the biggest you'll find, letting you ride up to 100 miles with pedal assist or 60 miles on pure electric power. For under $900, you're getting features that cost twice as much on competitor bikes, including hydraulic disc brakes, dual suspension, fat tires, and UL safety certification. The big color screen shows everything you need, and extras like turn signals and cruise control make long rides more enjoyable.

This bike shines brightest for adventure riders and outdoor enthusiasts who want to explore trails, mountains, beaches, and backcountry roads. The fat tires grip anything, the dual motors power through sand and snow, and the long range means you can go far from home without worry. It's also great for rural commuters with long distances to cover, especially if you have hills or rough roads. Speed lovers will enjoy the thrilling performance, though remember that 45 MPH is faster than legal limits allow on public bike paths in most places. The strong build handles riders up to 330 pounds, and the rear rack lets you carry gear or groceries.

However, this powerful machine comes with trade-offs. At 82 pounds, it's too heavy for most people to carry upstairs or load onto car racks alone. City dwellers in apartments will struggle with storage since it doesn't fold down. The 8-9 hour charging time means you need to plan ahead and can't quick-charge during the day. Most importantly, the high speed makes it illegal for regular bike lanes and paths, limiting where you can ride at full power. If you want something lighter, more portable, or legal for city bike lanes, look at smaller commuter models instead. But if you have storage space and want maximum power for off-road adventures or rural riding, the M8 delivers incredible performance at an unbeatable price.

What We Like

  • Super powerful dual motors put out 5000W peak power and hit 45 miles per hour, making this one of the fastest e-bikes you can buy
  • The huge 1300 Wh battery goes up to 100 miles on one charge with pedal assist, perfect for all-day adventures without worrying about running out
  • Fat 4-inch tires and dual suspension handle any terrain like sand, snow, gravel, or mountain trails with great grip and comfort
  • Amazing value at $900 considering you get dual motors, massive battery, and hydraulic brakes that usually cost twice as much on other bikes
  • Comes with UL safety certification, turn signals, and strong hydraulic brakes that stop you fast in under 2 seconds for peace of mind

What Could Be Better

  • At 82 pounds this bike is really heavy and hard to lift, carry up stairs, or put on a bike rack without help
  • The battery takes 8-9 hours to fully charge which is pretty slow if you forget to plug it in overnight
  • Top speed of 45 MPH is illegal on most bike paths and streets, so you can only use full power on private property
  • No folding ability means you need a big garage or storage space, and you can't take it on buses or trains easily
  • Missing modern extras like USB charging ports and smartphone app connection that cheaper bikes now include

Standout Features

5000W peak dual motor system
Significantly exceeds the 750W average, delivering over 6x the power of typical commuter e-bikes
1300 Wh battery capacity with 100-mile range
50% larger than the 864 Wh 'excellent' threshold, providing nearly double the range of average e-bikes
45 MPH top speed
28% faster than the 35 MPH 'excellent' benchmark, making it one of the fastest consumer e-bikes available

Full Specifications

Performance

Motor Power5000W peak (dual 2500W motors)
Gears7

Build & Frame

Frame MaterialAluminum
Wheel Size26 inches

Weight & Capacity

Bike Weight82
Max Rider Weight330

Features

Included Features

Cruise Control
Fat Tires
Fenders
Integrated Lights
LCD Display
Pedal Assist
Rear Rack
Removable Battery
Suspension
Throttle
UL Certified
Walk Mode

Not Included

App Connectivity
Foldable
USB Charging

Frequently Asked Questions

Common questions about GREATWORK Dual Motor Electric Bike for Adults, 52V 5000W Peak Motor, 45MPH, 1300Wh Battery, Up to 100 Miles Range, 26" x 4.0 Fat Tire Ebike with 7-Speed, Suspension, Turn Signals and Dual Disc Brakes

How fast does this electric bike go?

The bike can reach speeds up to 45 miles per hour at full power. You can also choose slower speeds using the 5 pedal assist levels that go 12, 20, 28, 36, or 45 MPH depending on what you need.

How far can I ride on a single battery charge?

You can go up to 100 miles if you use pedal assist mode, or about 60 miles if you ride on pure electric power without pedaling. The big 1300 Wh battery takes 8-9 hours to charge fully from empty.

Can this bike handle steep hills and off-road trails?

Yes, the dual motors provide enough power to climb hills up to 40 degrees steep. The 4-inch fat tires and front suspension work great on dirt trails, sand, snow, gravel, and mountain paths.

How much weight can this bike carry?

The bike can safely carry riders and cargo up to 330 pounds total. It has a rear rack for bags or gear, and the aluminum frame is built tough for heavy loads.

Is this bike safe and does it come with a warranty?

Yes, it has UL 2849 safety certification, hydraulic disc brakes that stop you in 2 seconds, integrated lights, and turn signals. The bike comes with a 1-year warranty from the manufacturer.

Scores

Overall Score 92/100
Value Score 95/100
Popularity 82/100

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Tags

high performance dual motor long range fat tire off road capable exceptional value heavy duty UL certified all terrain speed enthusiast

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