KingSong S22 Pro

What were the most common problems on the S22 & have they now been addressed?

The S20/S22 was first unveiled in August 2021, it had a delayed & troubled introduction with several systemic issues with the motor, lack of firmware optimization, poor slider mechanism design, bolts that were prone to stripping when carrying out routine tire/tube changes, & a high rate of charger failures. Through the use of upgraded 3rd party sliders & suspension arm bolts, & now with the latest 4th generation of motor (yes, it has taken King Song 4 attempts!), based on the current defect statistics, there is finally confidence that the present S22 has a high degree of reliability & durability.

Besides the stock knobby/J820-H & street/J863 tire, are the other tires 18/20×3″ tires compatible on the motor rim?

The rim size is slightly larger than other 14″ rims, such as the Sherman/Begode, etc, therefore the current stock of Kenda & Chao Yang tires do not fit either the 3.4KW or 4KW motors. Other known tires that fit the motor/rim are the: Michelin Pilot Street 2 90/90-14, Shinko 241 2.75/14, Pirelli Angel 80/80-14. If you prefer to have one of those installed, when ordering, let us know your preference, the tire swap service will be provided for free, the additional cost of the tire is about ~$65.

In evaluating where to purchase my S22 from, what is the value of upgrades that eWheels is providing?

The incremental volume cost of using high-powered Samsung 40T cells is about $100, a new 4th gen motor upgrade is $500, & the Hou slider-kits retail for over $200. At a minimum the additional component value is $500, to over $1,500, if one were to have to upgrade from a LG battery pack, bringing up to our current ship spec.

What is the maximum rate of charge?

While in theory the Samsung 40T cells can be charged at a higher rate than 10A, at a system level, there are other elements in the chain that limit charging to this rate: charge-port, wiring, & the BMS. For those using the LG M50LT cells, it is not recommended to exceed 8A.

Have there been any changes to the controller & MOSFETs?

According to King Song, the controller has the same architecture as when originally released. Depending supply constaints, King Song may use either a 125V or 150V FETs in the board, the higher 150V chip has a lower 45A peak spec, vs 100A with the 125V FET—on this controller, the 16x MOSFETs are arranged to in a 2x H-bridge configuration, for a maximum peak/burst output of 9,000W.

Does the ‘PRO’ 4KW motor have higher power consumption than the original 3.3KW motor under similar condition?

Yes, there is data to demonstrate that the 4KW/PRO motor uses ~20-25% more energy under like-for-like riding than the original 3.3KW motor. This roughly translates into 40 miles of range @ 22MPH for the 4KW motor & 55 miles with the original 3.4KW motor. If you prefer range over power, let us know when ordering & we’ll use the original motor [pinned] for your order.

Although King Song advertises a 130mm range of vertical travel in marketing materials, what is the ‘usable’ range with the coil/spring DNM shock?

While under compression, a spring shock can only be compressesd to about ~60% of the stroke length, or 75mm. Comparatively speaking, this is still a considerable increase from the S18, which is 57mm.

I have a fair amount of experience working on Wheels, is it possible to install the upgraded components myself & receive a discount when ordering?

Yes, if you’re willing to take on the motor change, slider-kit, charge-port, & bolt install yourself, we can offer a $200 discount on the order, e.g. $3,000.

I quite like the AE look, can I purchase those parts to install on my current Red & black S22?

Certainly, we’ve acquired those customized parts that can be purchased separately. If ordering as a ‘kit’, the price is about $250 for the panels & pads set.

How weather-resistant is the Wheel?

On the spectrum of available models, it’s about ‘average’. While King Song does not have a particular IP rating, based on the sales of hundreds of these S22s over the last two years, the number of fault cases attributable to the occasional use in wet conditions is very low. The standard recommendation is to not leave your Wheel exposed to the elements; try to avoid using in a heavy downpour, when possible; & do not ride through bodies of water.