Powell Peralta 'Kevin Reimer' Downhill Skateboard Wheels Yellow 72mm 80AAfter testing for many months we've optimized a new 80a SSF (Soft Slide Formula) and found it works phenomenally well in the 72mm Kevin Reimer mold. This formula is substantially more durable than the purple or green versions but retains all the characteristics you've come to love from the 72mm. Smooth sliding, fast rolling, but with more of an "on top of the pavement" feel. The stiffer 80a durometer makes for more firm edge grip before release and