This is a wheel for the big guys and girls, who can handle just about anything on their stunt scooter. The NKD Diesel is not only a super cool looking wheel, it is also a strong, durable and fast one. This wheel has a hollow aluminum core, that provides a great dynamic feel, when you ride, it has ABEC-9 bearings that make every trip smooth and fast and last but not least is it a big 120mm wheel with a suting hardness of 88A. An altogether nice wheel for the tough riders outthere!