Wheel Size: Features 76mm wheels, a common size for caster boards, providing a balance between stability and maneuverability. Compatibility: Designed to be compatible with various Razor RipStik Classic Air DLX G Ripsurf models, ensuring a perfect fit for a range of caster boards. Hardness Rating: Comes with a 90A durometer rating, indicating a hard wheel that offers durability and speed, suitable for smoother surfaces and trick performance. Material: Made from high-quality polyurethane (PU), known for its resilience, providing good grip, shock absorption, and a smooth ride. Pack Inclusion: Sold as 2-Pack wheels, making it convenient for replacing both wheels of a caster board at once. WHEELGOO 2-Pack 76mm PU Caster Board 90A Replacement Wheel Set