A man with a red helmet and numbers on his arm and leg is riding a red racing bike.
A person wearing numbers is using a nonmotorized vehicle.
A bike is a nonmotorized vehicle.
Numbers are on the man's arm and leg so he is wearing them, and he riding a red racing bike which is a nonmotorized vehicle.
A man with numbers on his arm means wearing numbers and having numbers on his arm riding a red racing bike means using a nonmotorized vehicle.