KingSong S18 2200W Electric Unicycle with 1110Wh Battery (Black) The KingSong S18 is a very comfortable size, coming in at 22 inches tall, 21 inches wide, and 8 inches deep. It wonâ??t take up too much storage at home, and can easily be stored in the boot of a car or on overhead storage on a train. Alternatively, the S18 can be carried by hand, as it only weighs roughly 48lbs (20kg). This is heavy enough to feel balanced when riding but light enough to be picked up with not too much trouble. The tire of the wheel itself is also decently sized, with an 18inch wide diameter, and 3inch thick rubber, making it sturdy enough to be ridden on rough surfaces without needing to worry about damage. The same goes for the pedals; they are raised high enough off the ground (4-8inches) that you donâ??t have to worry about damaging them, even when climbing steep hills and inclines. They come fitted with grip tape and can also hold up to 265lbs (120kg), yet there is an obvious trade-off of weight for speed. The more weight is put on top of it, the slower it becomes. But this problem is mostly unavoidable.