The price is primarily driven by bearing quality, hub material, and tread thickness. Wheels equipped with precision ball bearings or roller bearings offer lower rolling resistance and higher durability, commanding a higher price than those with simple plastic bushings. Additionally, galvanized or stainless steel hubs are more expensive than plastic or painted steel but offer essential corrosion resistance for humid or chemical-heavy environments. Ensure the axle diameter matches your existing equipment to avoid compatibility issues.