InMotion V13 Challenger vs Begode Master vs KingSong S22 Eagle Compared

At a glance

Three wheels keep coming up when riders shop for a big, fast electric unicycle: the InMotion V13 Challenger, the Begode Master and the KingSong S22 Pro, which KingSong nicknamed the Eagle and many retailers list as the S22 Eagle. None of them is brand new, but all three are still on sale and still widely searched, so this comparison puts their numbers side by side. It is based on manufacturer and retailer specifications and independent reviews, not on our own test rides.

Sources: InMotion V13 spec table as published by Speedy Feet, Electrek, Fresh Charged, Alien Rides, ERideHero, Speedy Feet listings for KingSong and Begode.

Battery, power and weight

The V13 Challenger carries the biggest pack: 3,024Wh, which is 26% more energy than the Master and 36% more than the S22 Pro. It also has the highest rated motor power, 4,500W with a 10,000W peak, against 4,000W for the S22 Pro and 3,500W for the Master. InMotion rates the pack at 108V and lists 126V as the maximum.

The Master has the highest voltage of the three at 134.4V, and it is by far the lightest: 36 kg against 50 kg for the V13. That works out to about 67Wh per kilogram for the Master and 60Wh per kilogram for the V13. If you regularly carry your wheel upstairs or lift it into a car, those 14 kg matter more than any power figure on a spec sheet. The sellers we checked do not give a weight for the S22 Pro, so we leave it out rather than guess.

Speedy Feet describes the S22 as the first 126V electric unicycle on the market and says its 2,220Wh pack doubles the capacity of the S18. Sellers list a hollow 4,000W motor.

Speed: read the numbers carefully

Listed top speeds are not directly comparable. InMotion's spec table gives 90 km/h (56 mph), and Electrek estimated the V13's real-world top speed at 90-100 km/h (55-60 mph) when it was unveiled. ERideHero lists the Master at 50 mph, and Alien Rides quotes up to 54 mph (87 km/h) for the V4. The S22 Pro is the slowest on paper at 70 km/h (43.5 mph). Ignore lift-speed and free-spin figures such as the V13's 140 km/h lift speed or the 85 mph (136 km/h) free-spin result Fresh Charged measured: they describe a wheel spinning in the air, not a rider on the road.

All three are fast enough that a fall can cause serious injury, so what matters is how much power reserve you have at the speed you actually ride, not the last digit of the maximum.

Suspension, tires and ride feel

Travel numbers favor the S22 Pro, but tires and tuning matter as much as millimeters.

• KingSong S22 Pro: 130 mm of travel, the longest of the three, an 18-inch tire and built-in boost pads, according to Speedy Feet.
• InMotion V13 Challenger: 90 mm gas-spring stroke with adjustable damping and a 3.00-16 tire; InMotion says the suspension can be converted into a non-suspension setup.
• Begode Master: 80 mm of air-spring travel with adjustable damping and a 2.75-14 tire; the V4 adds improved suspension linkages.

Longer travel usually means a softer ride over broken pavement, but we have not measured any of these wheels ourselves, so read independent ride reports before you decide.

Safety hardware and charging

• V13 Challenger: two motor Hall sensors, a smart BMS, IP55 protection (IPX7 for the battery), a roll cage and a trolley handle. One 5A charger takes 6 hours; two 5A chargers take 3 hours and two 7A chargers take 2 hours. ERideHero instead lists a 14A fast charger and 2.5 hours, so check which charger ships.
• Master V4: metal battery boxes, Samsung 50S cells and 36 MOSFETs (24 on earlier versions). The standard charger is 134.4V / 3A, which ERideHero lists as 5 hours; our own arithmetic (2,400Wh divided by about 403W) points to closer to 6 hours. No IP rating was listed.
• S22 Pro: a built-in kickstand, spiked pedals, tiltable headlights, a modular motherboard and dual charge ports that support 10A fast charging. No IP rating was listed.

Price and availability

At the retailers we checked, the V13 Challenger was £3,125 (list £3,291.67) at Speedy Feet in the UK and showed as sold out. The Master V4 was $2,299 (list $2,899) at Alien Rides as a pre-order with no firm ship date, and the S22 Pro was $2,449 (list $3,199) there, also as a pre-order with delivery quoted at 1-3 months. Per watt-hour of battery that is about $0.96 for the Master and $1.10 for the S22 Pro, and about £1.03 for the V13 (a different currency, so only a rough guide). Speedy Feet's own UK listings show the Master (a V2, described as the last of its shipment) at £2,162.50 and the S22 Pro at £2,245.83.

For context, Electrek reported an expected retail price of $4,600 and a pre-order price of $3,999 when InMotion unveiled the V13 in August 2022. ERideHero's current lowest listings are $1,999 for the Master and $2,699 for the V13, or about $0.83 and $0.89 per watt-hour, so the Master comes out cheapest per watt-hour in every price set we looked at, although its lead over the V13 is small there.

PEV Deals is a partner deals site, not a shop. Prices, stock and delivery are set by the sellers and change quickly, so check the current price on the seller's page and look for active discount codes before you order.

Know your version

Listings for these wheels disagree with each other. The Master exists as the V2, V3, V4 and Pro. The V2 listing quotes 24 MOSFETs, a 112 km/h free-spin speed and a 2.75-14 off-road tire, while the V4 listing says 36 MOSFETs and a street tire. One Alien Rides page gives the Master V4 tire as 2.75-14 (20-inch) in the table and as 18x3 in the description, and its S22 Pro page mentions a 20-inch wheel next to an 18-inch tire in the table. Before you order, ask the seller which version, which tire and which charger come in the box.

Which one to choose

• Choose the V13 Challenger if you want the biggest battery, the highest rated power and the most protection against water and sensor failure, and you can handle 50 kg and limited stock.
• Choose the Master if weight and value matter most: it is the lightest of the three and has the lowest price per watt-hour, with the shortest suspension travel to match.
• Choose the S22 Pro if ride comfort and fast charging matter more than outright speed: 130 mm of travel and 10A charging, but the lowest listed top speed.

There is no outright winner. The three wheels trade weight, power, comfort and price in different directions, so pick the one whose compromise fits where you ride.

Safety and local rules

Wheels in this class are for experienced riders. A full-face helmet, armored jacket, wrist guards and knee protection are the baseline, and many European countries restrict or ban high-power electric unicycles on public roads, so check the rules where you ride before buying.

Verdict

The V13 Challenger is the most powerful and best protected, the Master is the lightest and the cheapest per watt-hour, and the S22 Pro is the most comfortable on paper. All three have confusing listings, so verify the version and the tire with the seller, and wait for independent range tests before you trust any claimed range.