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Qualisports DOLPHIN Folding Electric Bike

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$1,799.00 $1,399.00

What our customers say:


Qualisports folding structure makes the folding size only 830*480*700mm, weighing only 50lbs.

It can easily fit in the back of an SUV, in the trunk of a car, RV, and easily folds for ease of transportation.


The Dolphin features a 14Ah Samsung battery, hidden in our patented seat post battery system that lasts longer, is more efficient and encased with full battery-cell protection sleeve. This e-bike will allow Qualibikers to ride between 50-60 miles of utilizing the PAS (Pedal Assist) mode and 30 miles range on the throttle mode in a single charge.

The intergraded customized BMS system protects the battery from over charging, over heating, stabilizes and regulates the current output.


The Re-programmed FOC controller offers Quali-bikers a more enjoyable and comfortable riding experience.

This is accomplished by the integration of our components mentioned above to provide a smoother fluid motor engagement.

We also intergraded a multi-function LCD display on board together with a 12 dots Cadence Sensor to help the riding experience more enjoyable. The LCD panel has the following visual indicators on it. 5 levels of PAS (Pedals Assist levels - 5 levels), battery level indicator, timer, speed, distance, average speed, trip distance, trip timer, ODO, max speed, battery voltage indicator, Lamp on/off, back lights, walking mode and cruise control mode.


The rear-mounted 350W brushless geared motor has been re-engineered from inside and out. New material was utilized in the gears producing a stronger magnetic field is applied inside the motor which achieves a more powerful and efficient motor that will endure a longer lifespan.


The Dolphin has been crafted and tested under our strict guidelines and procedures. The frame is made of 6061 Aluminum which is an industry-standard known for its lightweight and strength, allowing our bikes to appeal and support heavier cyclists.

Features & Specifications

  • Product name: Dolphin
  • Motor: MXUS Brushless geared DC motor
  • Brakes: 160mm disc brakes
  • Model name: QSEB 03
  • Rated output power: 350W
  • Rim: 20 inch Al-Alloy 12G36H
  • Size: 62.9*23.3*44.1inch
  • Motor efficiency: ≥85%
  • Tire: 20x2.35"
  • Folding Size: 32.6*18.9*27.5inch
  • Rated RPM: 310±10r/min
  • Chain wheel: Prowheel 52T
  • Wheelbase: 43.5inch
  • Rated voltage: 48V
  • Free wheel: Shimano 14-28T
  • Net weight: 50lbs
  • Max torque: 40N.m
  • Derailleur: Shimano 7 speed
  • Range: 62.5Miles(PAS)
  • Overcurrent protection: 15±1A
  • Chain: KMC
  • Max. load: 300lbs
  • Low-voltage protection: 30±1V
  • Handle bar: Promax
  • Kwh: ≤1.2Kw.h
  • Display: Kunteng LCD
  • Charging time: 6-7 Hrs
  • Modes: 5 levels
  • Controller: Kunteng sine wave FOC
  • Battery type: Samsung Lithium-ion
  • Tire diameter: 20x2.35 Inch
  • Brake levers: Al-Alloy e-bike lever
  • Battery capacity: 36V 14Ah
  • Frame: 20 inch 6061 Al-Alloy Foldable
  • Saddle: KNUS
  • Noise : ≤ 62 dB(A)
  • Front fork: 20 inch 6061 Al-Alloy
  • Pedal: Foldable Pedals
Every product in our catalog ships FREE to the lower 48 states* (and from the United States)! :-)

Generally speaking: small items, including most accessories, will ship out by USPS, FedEx or UPS typically within 1-2 business days. Larger items, including mobility scooters, power chairs, trikes, etc., are often arranged to ship with freight carriers and should typically ship within 2-4 business. Final delivery (meaning from the point shipment begins until the item is delivered to your door) can take anywhere between 2-7 business days, depending on the product(s) purchased, your location, and other factors.

View full shipping policy here.

Note: most online vendors ship directly from the manufacturers. As such, stock & shipping times are the same. We can guarantee fastest possible delivery times!

Every product is warranted to be free of defect! To see comprehensive warranty information for each manufacturer, please visit this page.

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