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King Song 14D, 420Wh Battery/800W Motor


  • Back in Stock
  • BONUS: equipped with the upgraded XL pedals & wrist-guards
  • 14D is in a class of it’s own, leaves similar entry/mid-range 14″ quite far behind in performance capability
  • Perfect choice for someone starting out, or looking to upgrade from an Airwheel, Segway S1, or even an Inmotion V5F


SKU: KS-14D Category:


King Song 14D Video Review

How Does It Compare?


King Song 14D Background:

Back in early 2015 King Song’s first breakthrough into the world of Electric Unicycles was their 14C. At the time, it was unique for a 14″ Wheel, in that it possessed, what was then, a massive 64 cell battery pack & a 800W powerful motor & quickly found favour in the enthusiast community. While this Wheel had the raw performance, it also had several failings that held it back from being the success it might have been:

  • Control-board Overheating: if the Wheel was pushed at all, the temperature would quickly rise, forcing the Rider to dismount
  • Width: at over 8″ wide, it was short & stubby, not the most comfortable stance to ride in
  • Design: it was frequently accused of being a bit of an ugly duckling
  • Durability & waterproofing: it’s main weakness was that motor axle that was used had a tendency develop hairline fractures which degraded over time. The water-protective measures were not very good at all

The King Song Engineering team built on the lessons, of the brilliant but flawed 14C, to create the 14D/14S line. It’s now equipped with a larger heat-sink & active (fan) cooling to dissipate unwanted heat build-up during high intensity operation; in the case of the 14D, the Wheel is 2″ thinner; is beautifully sculptured & now has the all important retractable handle alleviating the need to lug it around. On the durability side, there are dozens of small improvements that are almost too numerous to mention, better screw holds, thicker shell; but for durability, the most important improvements are probably the ticker axle & better pedals.

Key Features of the KS14D:

The King Song 14D is the perfect choice for Riders wanting to keep their budget under $1,000, but still have an eWheel which is convenient, practical, powerful, reasonable fast & has 15-20 mile range:

  1. Speed: the cruising speed to 50% battery is 18.6mph, thereafter the speed is gradually reduced to preserve the Rider’s safety;
  2. Power: the 14D is equipped with a 800W (sustained) motor & a tuned control-board that can output several times more than than nominal power output in short burst;
  3. New Control-board: the six MOSFETs (electronic switches that power the motor) have upgraded to 350A of MAX power, up-rated connectors, better power delivery, several under-the-hood improvements;
  4. More Atmospheric LEDs:  there are more programmable LEDs on each side of the Wheel for a greater visual impact;
  5. Integrated Telescopic Handle: the handle is made of a cast magnesium-alloy, which is unique to the other KS Wheels, where the handle is made from plastic, this gives the 14D/14S a feeling of solidity & strength in the hand.


  • Value: At $850, this model is one of the best value-for-money Electric Unicycles being offered;
  • Design & Comfort: the 14D is an attractive Wheel. It has narrow contouring sides, which makes it comfortable & an instant pleasure to ride. In contrast to it’s sibling, the 14S, because of it’s larger battery packs, it’s slightly wider than the 14D.
  • Comparatively Small, Compact & Lightweight: although the difference between a 14″ & a 16″ Wheel may not appear to be much, in the case of the 14D, it’s 10lb lighter than the KS16S, the overall cubic dimensions are 1/3 less than the larger Wheel. This means the 14D can be conveniently stowed under a car seat, or other tight space, where a larger 16″ would not be able to fit.
  • Performance: combination of the 800W motor & 420Wh battery pack supports a reasonably high cruising speed of 18.6MPH. The battery pack offers reasonably good range, typically between 15-20 miles for a 150lb Rider on a flat, smooth road.
  • Durability & Quality: based on our experience with selling hundreds of this mode, the construction is designed last the test of time & can take quite a lot of abuse. Many of the components are over-engineered to ensure it will continue operating for many years of daily commuting. There are other nice touches to the 14D, some of these are not even found on the larger (more expensive) Wheels, like the handle that is constructed of a high strength magnesium alloy.


  • Maximum Cruising speed limited to 50% of Charge: to preserve the Rider’s safety, the firmware on the 14D is programmed to reduce the maximum cruising speed from 18.6mph at 50% (or when the voltage fall below 58v), in progressive decreasing speed increments. This feature means that you can expect to be riding the Wheel at a lower speed towards the end of a long journey from when you had set off. On the larger battery version, the 14S, its firmware is programmed to allow you to continue riding at the maximum cruising speed down 30% capacity, or 55v & also has double the battery, so that you can ride at the higher cruising speed for 3x longer than the 14D.  
  • Recommended weight limit to 200lb: the 14D is fitted with 32x 18650 battery cells, each one delivers a finite amount of power to the Wheel. The more of these battery cells a machine has (up to a point), the more continuous power it is capable of delivering. A Rider’s weight is one of the most important factors to consider when choosing what Wheel is the best fit for you. If you’re over 200lb, or expect to do a lot of hill climbing, than the 14S is a better choice. 
Mid-Level Electric Unicycle, Dimensions Weight Comparison, v1. Gotway MTen3, King Song 14D, 14S, Inmotion V8F, V8S, 16S, Begode MCM5v2