20" Mad4One Powersquare Unicycle - ISIS hub
Square frame made of AL-6069-T6 alluminium alloy, 27.2 mm seatpost, Mad-Tecno ISIS steel hub, 20" wheel, Mad4One ISIS cranks. Thanks to the materials and solutions chosen, the Mad4One Urban unicycles are the best in their category in terms of stiffness and durability. You can choose the standard configuration we propose or change saddle, rim, cranks, pedals and last but not least the color. Just build it as you like.