![Blank Skateboard Wheels - Pedal Driven Cycles](http://www.pedaldrivencycles.com/cdn/shop/products/54mmwhite_{width}x.jpg?v=1602524457)
These are some price point options.
99a durometer
Durometer measures the hardness of the skateboard wheel. Most manufacturers use the Durometer A Scale, which is a 100-point scale that quantifies how hard the wheel is. The higher the number the harder the wheel, although the average wheel durometer is 99a.