Superfast 84mm/90A Berlin the FRX 310 delivers excellent

the FRX 310 delivers excellent rolling performance and outstanding comfort

The size is adjustable from 33 to 36 or size 37 to 40

speed profile

Big white logo printed on the back

the Crown system enhances performance in several ways: The majority of grit and dirt enters the bearing through the inner ring and the shield

Superfast 84mm/90A Berlin the FRX 310 delivers excellentSymetrics Superfast 84mm The all new wheel features a speed profile for even stride control and fast rolling. They used a 90a compound that is unmatched in both speed and grip. Adapt their obsession with finding the perfect wheel took over a year; they tested wheels from 3 different manufacturers, several compounds and cores. In the end, they decided to create their own mold and urethane since none of the wheel companies provided what they needed.