92a durometer urethane
"92a is our all-around, street or park skating durometer option. The 92a durometer wheel provides a great balance between grip while skating, and reduced friction while grinding.
If you’re not fully sure which hardness fits your style of skating, we recommend this 92a for both flat and anti-rocker setups."
 
58mm wheel diameter
"We found that 58mm is the best size for all around street and park skating. It is small enough to keep you close to the ground, and stay out of the way while grinding, yet large enough to last you while skating rough surfaces in the streets. We developed this unique rounded profile to provide a natural feeling of fluidity while rolling and turning."