Ecotric 500W Dolphin Folding Fat Tire Electric Bike

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FREE Poplock bicycle lock ($84.95 value)

Color: Black

5% OFF W/Code "PRIME" Apply Coupon

$892.05 after coupon
Sale price$939

Motor Size:

500 Watt


36V 12.5ah Lithium

Drive Mode:

Class II: Throttle Pedal Assist

Frame Type:

Aluminum Alloy Foldable Step-Thru

Wheel Size:

20" x 4"

Motor Position:

Rear Hub

Financing Available

Pay in 4 interest-free payments.

Free Shipping

Enjoy free shipping to the continental US.

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Lifetime customer & technical support

Premium Warranty

Every bike comes backed by a warranty against manufacturing defects

The Ecotric 500W Dolphin fat tire is a folding electric bike that is easier to transport and store. With the pedal assist on-demand throttle, carrying the load and traveling farther won't be an issue as you have electric assistance to guide you during the journey. The bike is equipped with 20X4.0’ fat tires that mute down the jerks' impact, so the rides are smooth for you.

500W Gear Motor

500 Watt brushless geared motor
Tire: 20" * 4.0 Anti-skidding,adapt to snow, sand and other complex topography
Inner tube: 20×4.0/4.9
Valve stem: American standard size
attached: valve cap

2 Upgrade Points

C-NDOL20LED-WB,This upgrade has the following 2 points

S900 upgrade to M3 meter (meter plus headlight switch function)

Removable Lithium Battery

36V/12.5AH Removable Lithium Battery,so you can bring the battery to your home or office to recharge.Travel range 18-23 miles in pure electric mode and 45-48 miles in pedal mode.
Charging time: Appro 6-8 hours
Battery life Up To 400-600 Cycles.
Battery lock and power lock function

Disc Brake

Outage braking system and Mechanical braking system,work along both lines, provide security for your trip.
7 Speed system
Come with pedal assist and walk assist model

Foldable & Portable

Put it in the trunk.
Take it to the elevator.
Take it to the subway.


Model Size: 1780*620*1120mm
Motor: Rear Hub 36v 500w
Battery: 36v 12ah
Charging Time: 5-8 Hours
Display: Ecotric Smart Led
Battery Life: 400-600 Cycles
Rear Brake: Mechanical Disc 160mm Rotor
Functions: Pedal Assist On-Demand Throttle
Frame: Aluminum Alloy
Tires: 20×4.0' Fat Tires
Fenders: Included, Front And Rear
Weight With Battery: 55lb
Weight Capacity: 200lbs
Derailleur: 7speed Shimano
Front Brake: Mechanical Disc 160mm Rotor

Customer Reviews

Based on 2 reviews
Valerie May
2 Ecotric Dolphin 500w

We received our 2 bikes in a weeks time. After assembling, we hit the road. We were excited and impressed with the bikes. My husband and I enjoy them greatly and believe they were the best value after researching ebikes for a month. The only issue we've had was the control for the pedal speed was broken during shipping, on my bike.

Karen Soro
WOW!!! great purchase.

I absolutely LOVE my new bike. It has the perfect amount of power for the hills of middle Tennessee. Bikeberry was a pleasure to deal with. They kept me informed all the way through the shipping process ( which was quite quick... I thought it may have gotten delayed because of all of the supply chain havoc these days... but it only took a week. )

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