Qualisports Dolphin Folding Electric Bike Overview
The Qualisports Dolphin is the long-range model in the Qualisports lineup, built around a 14Ah Samsung battery – double the capacity of the Nemo and Volador – for 50 to 62 miles of pedal assist range per charge. A re-engineered 350W MXUS brushless geared motor, Shimano 7-speed drivetrain, FOC controller, and 20-inch wheels combine with the larger battery to create the most range-capable folding electric bike in the Qualisports range. The proprietary seat-post battery system accommodates the 14Ah pack through careful engineering while maintaining the clean, non-electric-bike appearance that defines the Qualisports aesthetic. Available in Glossy Metallic Grey and Satin Black at $1,299.
Who Is the Dolphin For?
The Dolphin is for commuters whose daily round-trip exceeds what the Nemo and Volador’s 31-mile range can comfortably cover, or for riders who want the assurance of abundant range without monitoring the battery level throughout their ride. At 50 to 62 miles of PAS range, the Dolphin provides enough capacity for most urban riders to go multiple days between charges, which meaningfully reduces the logistical overhead of electric bike commuting. The 300 lb maximum load capacity also accommodates a wider range of riders than the Nemo and Volador’s 220 lb rating.
Key Features and Benefits
- 14Ah Samsung Battery: Double the capacity of entry models for 50-62 miles of PAS range – enough for multi-day riding between charges for most commuters.
- 62.5-Mile PAS Range: The longest range in the Qualisports lineup, with 30+ miles on throttle-only mode.
- Re-engineered 350W MXUS Motor: New gear materials and stronger magnetic field for more power, efficiency, and longer motor lifespan than previous generations.
- 300 lb Maximum Load: Higher payload capacity than the Nemo and Volador, accommodating a wider range of riders.
- Shimano 7-Speed Derailleur: Full Shimano drivetrain including derailleur, 14-28T freewheel, and Prowheel 52T chainwheel.
- FOC Controller (Kunteng Sine Wave): Smooth, quiet, efficient motor control.
- Full LCD Display: 5 PAS levels, battery indicator, timer, speed, distance, average speed, trip distance, ODO, max speed, voltage, lamp control, walk mode, and cruise control.
- 5 PAS + Throttle + Walk Assist + Cruise Control: The most complete riding mode set in the Qualisports range.
- 160mm Disc Brakes: Reliable stopping with motor cutoff on engagement.
- 20-Inch 6061 Al-Alloy Frame: Stable platform with folding design.
- 47 lbs: Heavier than the Nemo due to the larger battery, but manageable for most folding scenarios.
| Motor | 350W MXUS Brushless Geared (re-engineered) |
|---|---|
| Battery | 36V 14Ah Samsung Lithium-ion (seat-post) |
| Range | 62.5 miles (PAS) / 30+ miles (throttle) |
| Top Speed | 20 mph |
| Charge Time | 6-7 hours |
| Weight | 47 lbs |
| Max Load | 300 lbs |
| Wheel Size | 20 inch |
| Tyre | 20×2.35 inch |
| Gears | Shimano 7-Speed (14-28T freewheel) |
| Frame | 6061 Al-Alloy foldable |
| Brakes | 160mm disc |
| Controller | Kunteng Sine Wave FOC |
| Display | Kunteng LCD (full information) |
| Modes | 5 PAS + throttle + walk assist + cruise |
| Folded Size | 32.6 x 18.9 x 27.5 inches |
14Ah Battery: What Double the Capacity Means in Practice
The Dolphin’s 14Ah battery delivers more than just double the range of the 7Ah models. A larger battery also maintains higher voltage under load for longer into the discharge cycle, which means the motor receives more consistent power throughout the ride rather than experiencing the gradual performance reduction that smaller batteries show as they approach depletion. For riders who regularly ride in hilly terrain or carry cargo, this voltage stability advantage is practically significant beyond the simple range increase. The 6-7 hour charge time for the 14Ah pack is longer than the 3-hour charge of smaller batteries, but the multi-day range capacity means most commuters will charge overnight once or twice a week rather than every day.
FOC Technology: What It Means for Your Ride
Qualisports uses Field Oriented Control (FOC) technology in their motor controllers across the entire lineup. FOC is a motor control algorithm that measures the motor’s actual rotational position continuously and uses this information to deliver current to the motor windings at precisely the optimal angle and timing. Compared to simpler motor controllers that operate on fixed timing, FOC delivers more torque per amp of current, more efficient energy use, significantly reduced motor noise (FOC-controlled motors run considerably quieter than non-FOC alternatives), and smoother power delivery without the lurching that less sophisticated controllers can produce at low speeds.
The practical result for riders is a more natural, seamless pedal-assist experience where motor engagement and disengagement happen smoothly rather than abruptly, less battery energy is wasted as heat in the motor, and the bike is genuinely quiet enough to use in residential and urban environments without attracting attention. FOC is found in premium electric bike controllers at all price points; Qualisports’ consistent use of FOC across their lineup from the entry-level Nemo upward is a deliberate quality commitment rather than a premium option.
Samsung Battery Cells: Why Cell Quality Matters
Qualisports uses Samsung lithium-ion cells in their battery packs across the full lineup. Battery cell quality affects every aspect of battery performance: energy density (how much range a given pack weight delivers), power delivery (how well the battery maintains voltage under high current draw), thermal management (how much the cells heat under load), and cycle life (how many charge-discharge cycles the battery retains useful capacity through). Samsung cells are chosen by premium electric vehicle manufacturers globally because their combination of these properties is consistently better than lower-cost alternatives.
For owners who charge and use their bike daily, the cycle life advantage of quality cells is the most practically important benefit. A battery built with Samsung cells will retain useful capacity through more charge cycles before degrading to a point where range is noticeably affected. For riders who use their folding electric bike as a daily commuter, this translates to more years of useful service from the original battery before replacement becomes necessary.
Seat-Post Battery: Design and Function
Qualisports’ patented seat-post battery integration is the defining design feature of their lineup and deserves more explanation than a single specification line. Conventional electric bikes mount their battery on the down tube (the diagonal frame tube) as a visible, external module. This approach is practical – the battery is easy to access and remove – but it also creates the visual signature that marks an electric bike as distinctly different from a conventional bicycle, which some riders prefer to avoid.
Qualisports engineering team designed the seat post to serve as the battery housing, integrating the cells inside the post in a configuration that maintains the post’s structural function while adding the battery function. The result is a bike that looks like a well-designed conventional folding bicycle from a distance. The battery is removable for indoor charging without bringing the entire bike inside – simply pull the seat post out of the frame, carry it to an outlet, and charge. The BMS (Battery Management System) built into each pack manages cell balancing, overcharge protection, thermal monitoring, and discharge protection to maintain safety and longevity.
Why a Folding Electric Bike Is the Ideal Urban Commuter
The folding electric bike solves the two biggest obstacles to urban cycling adoption simultaneously: storage and effort. A conventional electric bike requires secure outdoor lock-up or dedicated indoor storage space – neither of which most urban apartment or office dwellers have conveniently. A folding electric bike folds to a compact package that fits under a desk, in a wardrobe, in a car boot, or alongside you on public transit. It never needs to be left outside where it is vulnerable to weather or theft.
The electric assist solves the effort problem that keeps many people from cycling to work: arriving sweaty. With pedal assist, you control how much physical effort you contribute to every journey. Commute to work on low assist and arrive fresh. Ride home on higher assist and treat the return journey as a workout. The same bike, the same route, entirely different physical outcomes depending on your choice that day.
Qualisports’ consistent choice to make their bikes discreet – through the seat-post battery, clean frame lines, and careful component integration – adds a third advantage: the bike does not look like an expensive electric bike when stored in a public location or left in an office, which reduces the visual cue that invites theft or unwanted attention.
About Qualisports
Qualisports is an electric bike company whose name reflects their core principle: quality is not a feature, it is a prerequisite. Their folding electric bike lineup – the Nemo, Volador, Dolphin, and Beluga – is built around the idea that a folding electric bike should be genuinely portable, genuinely good-looking, and genuinely well-engineered rather than a compromise in any of those dimensions.
Qualisports’ signature design decision is the seat-post battery system. Rather than mounting a battery pack on the down tube or rear rack where it is immediately visible as the utilitarian element it is, Qualisports integrates the battery inside the seat post, creating a clean, minimalist silhouette that most observers do not immediately recognise as an electric bike. This decision requires more engineering effort than a conventional external battery mount, but the result is an aesthetic that makes the Qualisports bikes stand out from the crowd of conventional-looking electric bikes. Their consistent use of MXUS motors, Samsung battery cells, KMC chains, Shimano drivetrains, Prowheel chainwheels, and Kunteng FOC controllers reflects component sourcing that prioritises reliability and quality over cost minimisation.
Qualisports Model Comparison: Choosing the Right Bike
The Qualisports lineup is structured around four distinct configurations that serve different rider priorities. Understanding the key differences helps you identify the right model without overspending on capability you do not need.
The Nemo at 30 lbs with 16-inch wheels and a 250W motor is the maximum portability option – the right choice when weight and compact size matter most. It is the lightest, smallest, and easiest to carry of the four models. At $999 it is also the most affordable entry into the Qualisports seat-post battery system. The 16 mph top speed is appropriate for urban cycling infrastructure, and the 31-mile range covers most daily commuting needs.
The Volador at 36 lbs with 20-inch wheels, a 350W motor, and Shimano 7-speed gearing provides a step up in speed (20 mph), stability, and terrain versatility over the Nemo at a $100 price premium. The larger wheels are noticeably more confidence-inspiring on urban roads and light trail surfaces. The Shimano 7-speed adds hill-climbing efficiency that the motor-only Nemo lacks. For riders whose primary concern is not maximum portability but overall riding capability and comfort, the Volador is the better-matched choice at $1,099.
The Dolphin at 47 lbs adds double the battery capacity (14Ah vs 7Ah) over the Volador for 62.5 miles of PAS range at a $200 premium. The re-engineered motor and higher payload (300 lbs vs 220 lbs) are also upgrades. Choose the Dolphin if your round-trip commute exceeds 25 miles, if you want multi-day range between charges, or if the higher payload capacity is relevant to your riding. At $1,299 it is the range-focused choice in the lineup.
The Beluga at 51 lbs adds a 500W motor, 48V system, and 4.25-inch fat Kenda tyres at $1,399. Choose the Beluga if you face significant hills (18-degree grades), frequently carry heavy loads, or want the all-terrain traction of fat tyres for varied surface conditions. The fat tyre format also provides excellent vibration absorption on rough urban surfaces. The trade-off versus the Dolphin is less range (25+ miles vs 62.5 miles) from the smaller 10.5Ah pack, but more motor power and better terrain capability.
Maintenance and Long-Term Ownership
Qualisports bikes are designed for daily use and quality components throughout support long-term reliable ownership. The KMC chains used across the lineup are a respected drivetrain component brand – keep the chain clean and lubricated by cleaning it every few weeks and applying chain lube after any wet ride. On the multi-speed Volador, Dolphin, and Beluga, check derailleur cable tension periodically as cables stretch slightly with use and can cause hesitant shifting if not adjusted.
The seat-post battery should be inspected at the electrical contacts periodically to ensure they remain clean and free of corrosion. The BMS in each pack manages cell health automatically, but storing the battery at partial charge (60 to 80 percent) during periods of non-use extends cell longevity. If storing a Qualisports bike for more than a month, remove the seat-post battery, charge it to 60 to 80 percent, and store it in a cool, dry environment.
Disc brake pads wear with use and should be inspected every few months under regular commuting use. If the brakes feel less firm or require more lever travel than usual, the pads may need replacement. Qualisports uses 160mm rotors across the lineup, and replacement pads are a standard size available from most bicycle parts suppliers. Electric Bikes Paradise can advise on replacement parts for any Qualisports model.
Financing Your Qualisports Bike
Electric Bikes Paradise offers flexible financing options through our lending partners, making Qualisports electric bikes accessible across a range of budgets. Monthly payment plans spread the purchase cost into manageable instalments. Visit our financing page to explore current offers and apply in minutes. A folding electric bike that transforms your daily commute, eliminates parking costs, and makes every journey more enjoyable is a worthwhile investment to finance rather than delay.
Warranty and Support
Every Qualisports product sold through Electric Bikes Paradise is backed by manufacturer warranty coverage. If you have questions about your bike, need a replacement part, or run into any issue after delivery, contact our team directly at +1 (307) 429-0021 or visit our Warranty Policy page for full details.
Why Buy from Electric Bikes Paradise?
At Electric Bikes Paradise, we carry only the brands and products we would put our own family on. Every Qualisports product we stock is vetted for quality, performance, and value. When you order from us, you get free shipping with no hidden freight charges, no sales tax on most orders, and a Low Price Guarantee. Our team is here to answer pre-purchase questions and help you choose the right model. We offer flexible financing options. Contact us any time.