The Chroma Team 58mm Aggressive Wheels 4pk have what they call a flat bullet design for optimal balance of speed and slide. At 58mm they fit most frames and at 90A with the same quality urethane used on their pro wheels, they can take punishment.
The Chroma Team 60mm Aggressive Wheels 4pk have a round profile in high-quality urethane for a smooth feeling roll. Great for skating anti-rocker. These are made out of the same great urethane as their Pro wheels.