Wheels you can trust, these Bighead Spitfire wheels were hand poured and made in the USA, they're also guaranteed against defects which is something that definitely inspires confidence.
Medium - Your classic wheel shape, versatile all-around wheel for street/park skating.
Treaded - Treaded wheels come with tiny grooves on the riding surface that wear away quickly.
99a - Offers more grip than harder wheels and more slide than softer wheels. Great for slick surfaces when you want more control.