Skatepark Formula (SPF) is very high quality urethane specifically formulated to resist flatspotting on slick or smooth surfaces while maintaining a higher rebound for a quicker response and a faster roll.

Skatepark Formula has a high resistance to abrasion while not compromising hardness and slide ability. Simply put, Skatepark Formula wheels grip better on slick surfaces, are almost impossible to flatspot, and are the fastest, longest lasting wheel on the market today.

These wheels measure 58mm x 33mm on the P5 Sidecut shape in 81B Durometer. 81B is roughly equivalent to 101A.