The Jus1 (just one) is the first unicycle with an almost unlimited adjusting range. With it’s new worldwide patented “Off-Center“- tangential seat post it offers an ideal ergonomic flexibility. The range covers kids and adults, from 120-190 cm of body height. Kids have more fun and parents do not need to buy a new bike every season. This is also an ideal solution for schoolyards or sports clubs where different users share the same product.