Quasi - 54MM CONICAL PROTOTHANE WHEELS 83b

Brand: Quasi Skateboards

Size: 54mm diameter

Shape: Conical (slightly wider riding surface, more stable and better for locking into grinds than classic shapes)

Formula: Protothane (Quasi’s custom urethane blend for durability, slide control, and flatspot resistance)

Durometer: 83B (equivalent to about 103a — very hard, ideal for smooth concrete, parks, and technical street skating; slides well but not forgiving on rough ground)

They’re a pro-level hard street/park wheel with an emphasis on control and slide.