King Song S18 / S22: Everything You Need to Know
Two electric unicycles, now sold as Pro+ cards that are both sold out. S18 Pro+ is 28 mph and 1,110Wh. A US shop still titles an S18 at 31 mph and 903–1,110Wh. S22 Pro+ is 43 mph and 2,220Wh.
By SickEBike desk
The short answer
The collection leads with Pro+ cards, and both said sold out here. S18 Pro+ copy is 28 mph, 55 miles, 1,110 Wh, 100 mm of travel, and 25 kg. S22 Pro+ copy is 43 mph, also written 70 km/h, 2,220 Wh, 130 mm, and 35 kg, also written 77 lb. EUCO’s older S18 spans 903–1,110 Wh at 84 volts.
King Song’s S18 and S22 are electric unicycles, not bicycles. On King Song’s own collection the names that are still up are the S18 Pro+ and the S22 Pro+, and both were sold out on this crawl. The S18 Pro+ card prints $1,629 from $2,499, 28 mph, 55 miles, 1,110 Wh, a 5,000 W peak, 100 mm of travel, and 25 kg. The S22 Pro+ card prints $2,399 from $3,199, 43 mph, 93 miles, 2,220 Wh, an 8,500 W peak, 130 mm, and 35 kg. EUCO still sells a wheel titled S18 at $1,195 from $2,099, with 31 mph, 903–1,110 Wh at 84 volts, and a 2,200 W motor. The list’s “$2,000+” is a slogan, not either sale price. The row on this desk’s list links here.
Pro+ on the brand site, and an S18 that is still a shop title
King Song collection cards versus EUCO’s S18. The brand site’s compare table repeats the Pro+ peaks and the 25 kg / 35 kg masses. It does not list a plain S18 or a plain S22.
| S18 Pro+ | EUCO S18 | S22 Pro+ | |
|---|---|---|---|
| Price | $1,629 from $2,499. Sold out. | $1,195 from $2,099. In stock on that page. | $2,399 from $3,199. Sold out. |
| Speed | 28 mph | 31 mph | 43 mph, also written 70 km/h |
| Range | 55 miles | 42 / 50 miles | 93 miles, also written 150 km |
| Pack | 1,110 Wh | 903–1,110 Wh, 84 V | 2,220 Wh |
| Motor | 5,000 W peak on the compare table | 2,200 W, “peaks much higher” | 8,500 W peak |
| Travel | 100 mm | Rear air shock. No millimeter on that card. | 130 mm |
| Mass | 25 kg | 52.90–53.30 lb | 35 kg, also written 77 lb |
Twenty-five kilograms is 55 lb. EUCO’s 53 lb band is close to that and still a different card, because 28 mph and 31 mph are not the same cap and 2,200 W is not 5,000 W. Nine hundred three watt-hours and 1,110 watt-hours are both on the shop title. The Pro+ card prints only 1,110. Thirty-five kilograms is 77 lb, which matches the S22 Pro+ mass line. Do not average an S18 into an S22 to get a “King Song” spec. The Inmotion V14 is the other pair of wheels on this list, and it is not this brand. A full-face helmet is the minimum serious riders treat as normal on a 43 mph wheel. That is not a bicycle recommendation.
Sold out on the brand site is a stock fact. It is not a reason to pretend the 28 mph card and the 31 mph card are one S18.
Who it is for
Buy an S18 only after you know whether the box is the Pro+ at 28 mph or the shop wheel at 31 mph. Buy an S22 Pro+ only if 2,220 Wh and 43 mph is the card you meant, and only if someone actually has one. Neither has pedals. Both fail the class chart. Watt-hours, not a “$2,000+” shrug, are the unit.
Questions people ask
Does sold out mean discontinued?+
It means the brand collection had no stock on this crawl. A dealer can still hold an older S18. Check the cap: 28 mph is the Pro+ line, 31 mph is the shop line.
What is actually inside the shop S18?+
EUCO prints 31 mph, up to 42 or 50 miles, 2,200 W, and a pack that spans 903 to 1,110 Wh. The Pro+ card prints a single 1,110 Wh and a much higher peak. Do not merge the peaks.
Do the S22 masses match?+
35 kg and 77 lb are the same mass written twice on the Pro+ card. The S18 Pro+ is 25 kg. The shop S18 near 53 lb is close to 25 kg and still a different speed card.
Is “$2,000 plus” useful?+
Only as a shrug. Real tags this crawl were $1,629, $2,399, and a shop S18 at $1,195. All three can be out of stock tomorrow. The shrug cannot.
Keep riding
Inmotion V14 / V13: Everything You Need to Know
Two electric unicycles, not a bike. Inmotion’s V14 card is $2,699, 50 mph, 2,400Wh, and 9,000W peak. A Canada V13 card is about 56 mph, 3,024Wh, and 10,000W peak, and it also prints a 140 km/h lift speed.
SEP 25, 2026
What Is a Class 1, 2, and 3 E-Bike?
Class 1 is pedal-assist to 20. Class 2 adds a throttle to 20. Class 3 is pedal-assist to 28. A Tuttio is none of these. The sticker is not the trail.
SEP 23, 2026
Florida This Week: Jacksonville’s 15 MPH Cap, and an Oviedo Stop
The 19-0 vote is a Duval sidewalk rule, not a new state law. In Oviedo, police say 4,500 watts and no pedals. The father says 20 mph. Do not average them.
SEP 25, 2026