Smooth - Smooth wheels come with a shiny coating on the riding surface that feels grippy at first, but wears away quickly.
Wheel Profile
Wide - More traction and stability at high speed so you'll be less likely to slip out of your line.
Durometer
97a - Offers more grip than harder wheels and more slide than softer wheels. Great for beginners wanting more control on smooth surfaces or for filmers looking for a smooth roll.