Narrow - The least amount of traction intended for advanced, technical skateboarding.

Smooth - Smooth wheels come with a shiny coating on the riding surface that feels grippy at first, but wears away quickly.

PF Formula - Extra grip on smooth surfaces and twice the life of ordinary wheels, no matter where you ride them.

84b (104a) - Hardest, fastest wheels designed for advanced (pro level) skateboarding.

The 'b' scale measurement reads 20 points lower than the 'a' scale: 84b would equal a theoretical hardness rating of 104a.

Made in the USA - Poured in Santa Barbara, California.