StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › Compare

Hyper Ultra 20 Fat Tire E-Bike vs AMYET S8 Dual Motor AWD Electric Bike

The AMYET S8 is the stronger bike on paper and in owner ratings: dual motors, full suspension, hydraulic disc brakes, a 25Ah battery and a Class 3 top speed. The Hyper Ultra is a simpler, lighter-duty 20-inch fat tire bike with pedal assist only, front suspension and a shorter assist range. Buy the AMYET if you want power, range and comfort on rough ground; buy the Hyper if you want a basic, lighter errand bike and don't need speed or long distance.

  • Choose the Hyper Ultra if you want a simple, lighter 20-inch fat tire bike for short errands and paved paths, and you don't need a throttle, full suspension or long range.
  • Choose the AMYET S8 if you want dual-motor all-wheel drive, full suspension, hydraulic brakes and long range for hills, trails and heavier riders.

Prices

  • Hyper Ultra 20 Fat Tire E-Bike: $398.00 at Walmart (checked today)
  • AMYET S8 Dual Motor AWD Electric Bike: $583.00 at Alibaba.com (checked today)
  • Difference: the Hyper Ultra 20 Fat Tire E-Bike is $185.00 cheaper than the AMYET S8 Dual Motor AWD Electric Bike today
Hyper
Hyper Ultra 20 Inch Fat Tire Electric Bike

Hyper Ultra 20 Fat Tire E-Bike

Hyper Ultra 20 Inch Fat Tire Electric Bike

3.7(137 ratings)
$398.00at WalmartChecked 9 min ago
See all prices and details
Visit Walmart
Pros
  • Aluminum frame keeps it lighter than the AMYET
  • Fat 20x4 tires add traction on loose surfaces
  • Under-seat storage is handy for small errands
  • Shorter 4-hour charge time
Cons
  • Pedal assist only, no throttle
  • About 20 miles of assist is short for commuting
  • Front suspension only, so rough trails are harsh
  • Lower owner rating
AMYET
AMYET S8 750W Dual Motor AWD Electric Bike for Adult, 20" Fat Tire Ebike 48V 25AH 28MPH E-Mountain Bicycle class 3, UL2849

AMYET S8 Dual Motor AWD Electric Bike

AMYET S8 750W Dual Motor AWD Electric Bike for Adult, 20" Fat Tire Ebike 48V 25AH 28MPH E-Mountain Bicycle class 3, UL2849

4.7(546 ratings)
$583.00at Alibaba.comChecked 54 min ago
See all prices and details
Visit Alibaba.com
Pros
  • Dual-motor AWD pulls hard on hills and loose ground
  • Full suspension and hydraulic brakes for control
  • 25Ah battery gives long claimed range
  • High owner rating from a large number of reviews
  • 330 lb load rating and 7 speeds
Cons
  • Very heavy at about 95 lb, hard to lift or carry
  • Steel frame can rust if neglected
  • 6-hour charge time
  • Assembly required

What separates them

Hyper Ultra 20 Fat Tire E-BikeAMYET S8 Dual Motor AWD Electric Bike
Motor and driveSingle pedal-assist motor, no throttle or AWDDual geared hub motors, all-wheel drive, 750W rated with much higher peak
Top speed and classPedal assist only, no stated Class 3 speedClass 3, up to 28 mph
SuspensionFront suspension onlyFull suspension front and rear
BrakesNot specified as hydraulicHydraulic disc brakes
Battery and rangeUp to 20 miles of assist, 4-hour charge48V 25Ah (about 1200Wh), up to 80 miles claimed, 6-hour charge
Frame and weightAluminum frame, lighter buildHigh-carbon steel frame, about 95 lb
Load and sizingOversized seat with under-seat storage330 lb max load, 7-speed drivetrain, adjustable bars and seat
Owner ratings3.7 out of 5 from 137 ratings4.7 out of 5 from 546 ratings

Price history

$1,061.67$583.00
Nov 9Nov 14
  • Hyper Ultra 20 Fat Tire E-Bike: lowest $1,061.67 on Nov 9 at Walmart; $1,061.67 on Nov 14.
  • AMYET S8 Dual Motor AWD Electric Bike: lowest $583.00 on Nov 14 at Alibaba.com.

Prices at every store

Hyper Ultra 20 Fat Tire E-Bike

  • WalmartNew

    In stock

    $398.00Free shippingChecked 9 min ago
    Visit Walmart

Also available at

  • WalmartCheck price at Walmart

Store links may earn us a commission.

Prices and history →

AMYET S8 Dual Motor AWD Electric Bike

  • Kaizen ElectricsNew

    In stock

    $1,099.00Free shippingChecked 54 min ago
    Visit Kaizen Electrics
  • Alibaba.comNew

    Availability unknownShips from abroad · duties may apply

    $583.00Checked 54 min ago
    Visit Alibaba.com
  • AMYET eBikesNew

    Availability unknown

    $1,049.00Checked 54 min ago
    Visit AMYET eBikes
  • WalmartNew

    Availability unknownSold by AMYET Office Store

    $1,099.99Checked 54 min ago
    Visit Walmart
All 4 stores and price history →

Specs compared

SpecHyper Ultra 20 Fat Tire E-BikeAMYET S8 Dual Motor AWD Electric Bike
Wheel Size20"20 in
ColorBlackGreen
Frame MaterialAluminumHigh Carbon Steel
SuspensionFrontFull Suspension
Actual ColorBlack—
size20—
Bicycle type—Mountain Bikes
Maximum travel distance—80 mi
Maximum speed—28 mph
Battery capacity—25 Amp Hours
Electric bicycle class—Class 3
Charging time—6 hr
Show all 26 specsShow fewer specs
SpecHyper Ultra 20 Fat Tire E-BikeAMYET S8 Dual Motor AWD Electric Bike
Bicycle brake design—Hydraulic Disc Brakes
Weight—94.79 lb
Volts—48 Volts
Watts—750 Watts
Brand—AMYET
Speeds—7
Max load—330 lb
Drivetrain—7x3
Frame size—18 in
Motor type—Geared Hub

What reviewers say

Hyper Ultra 20 Fat Tire E-Bike

  • 3.7 / 5137 ratings

Owners describe the Hyper Ultra 20 as a fun, stable fat-tire bike for casual rides and light off-road use. Many praise the wide tires and compact size, while some complain about the stiff ride and weight.

What people mention
  • TiresPraisedRiders say the fat tires grip well on sand, gravel and light snow.
  • SuspensionCriticisedThe front-only fork leaves the rear stiff on rough ground.
  • WeightCriticisedOwners find the bike heavy to lift onto racks or carry upstairs.
  • StabilityPraisedThe wide tires and low frame make it feel stable for new riders.

AMYET S8 Dual Motor AWD Electric Bike

  • 4.7 / 5546 ratings

Rated 4.7 out of 5 across 546 ratings, owners largely praise the dual-motor power, ride comfort and range. Complaints center on the weight and bulk.

What people mention
  • PowerPraisedOwners say the dual motors pull hard and climb steep grades with ease.
  • WeightCriticisedRiders note the bike is very heavy and hard to lift or carry.
  • ComfortPraisedFull suspension and fat tires are said to smooth out rough roads and trails.
  • Battery rangePraised

Questions and answers

Which is better for hills?
The AMYET S8. Its dual motors drive both wheels and it has a 7-speed drivetrain, so it climbs steep grades far more easily than the single-motor Hyper Ultra.
Which lasts longer?
The AMYET has the sturdier spec sheet: steel frame, hydraulic brakes and a larger battery. The Hyper's aluminum frame resists rust better, but its assist range and components are lighter duty.
Is the AMYET worth stepping up to?
Yes if you ride trails, carry weight or cover long distances. The Hyper is enough for short paved errands, but the AMYET adds power, range, suspension and braking that the Hyper lacks.
Can I ride the Hyper Ultra without pedaling?
No. It is pedal-assist only, with no throttle. The AMYET S8 has motor power you can use without pedaling.
Which is easier to carry or store?
The Hyper Ultra. Its aluminum frame and simpler build make it much lighter than the roughly 95 lb AMYET S8.
Are both legal as Class 3 ebikes?
The AMYET S8 is stated as Class 3 and UL2849 listed. The Hyper Ultra does not state a class, so check your local rules before riding it on bike paths.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

More comparisons

  • URLIFE E20 20*3.0 Fat Tire Commuting Electric Bike vs Hyper Ultra 20 Inch Fat Tire Electric Bike
  • URLIFE E20 20*3.0 Fat Tire Commuting Electric Bike vs AMYET S8 750W Dual Motor AWD Electric Bike for Adult, 20" Fat Tire Ebike 48V 25AH 28MPH E-Mountain Bicycle class 3, UL2849
  • Greenworks 20 in E Bike Fat Tire vs Hyper Ultra 20 Inch Fat Tire Electric Bike
  • Racer 20x4.0'' Fat Tire 2.0 Electric Bike vs Hyper Ultra 20 Inch Fat Tire Electric Bike
  • Greenworks 20 in E Bike Fat Tire vs AMYET S8 750W Dual Motor AWD Electric Bike for Adult, 20" Fat Tire Ebike 48V 25AH 28MPH E-Mountain Bicycle class 3, UL2849

Buying guides that pick them

  • Best 20-inch fat tire electric bikes
  • Best 20-inch fat tire bikes
  • Best 20-inch fat tire bikes for teenagers
  • Best 20-inch fat tire electric bikes for teenagers
Battery life
—
3 years
Age group—Adult
Rim material—‎Alloy Steel
Size descriptor—Large
The 25Ah battery is reported to deliver long rides between charges.