The Qu-ax Muni 20 ”is suitable for off-road riding with your unicycle. You can safely ride it in the woods like a mountain bike, but on one wheel. These unicycles have a red axis. The red axle is firmer than the normal unicycle axle. The pedals can be compared to BMX pedals, for more grip in the woods and for jumps. Suitable for advanced unicycles. Ø 20 inch = 51 cm