Pro Exercise Bike · Turn your traditional exercise into a more professional exercise with the exercise wheel. · The exercise wheel is made of very durable and strong plastic with soft silicone edges in addition to comfortable plastic handles. · This bike is designed for athletes to build professionally prepared muscles. · This wheel was made of the finest plastic to bear a greater weight. · Silicone outer panels to prevent scratching the floors. · Extremely durable rods. · Total diameter of up to 18 cm, suitable for all users of different weights.