Narrow - Narrow wheels have the least amount of traction and are intended for advanced, tech riding.
Smooth - Smooth wheels have less surface friction than treaded wheels and are easier to slide.
Skatepark Formula (SPF) - Skatepark Formula wheels are made from a high quality urethane that was specifically formulated to resist flatspotting on slick or smooth surfaces while maintaining a higher rebound for a quicker response and a faster roll.
SPF wheels have a high resistance to abrasion without compromising hardness and slide ability. Skatepark Formula wheels grip better on slick surfaces and are almost impossible to flatspot.
84b (104a) - A hard skatepark formula wheel, designed for a fast roll whether charging the local park or your neighbor's pool. The 'b' scale measurement reads 20 points lower than your typical 'a' scale, meaning the hardness of the 84b would equal a theoretical hardness rating of 104a. This is beyond the limitations of the 'a' scale which tops out at 101a.
Made in the USA - All Bones and Powell wheels are made at their factory located in Santa Barbara, California.
|Riding Surface (mm):||17.5||16.5|
|Suggested Riser Size (in):||N/A||1/8|