THESE ARE THE FIRST SAMPLES OF THE NEW KALTIK FLAT FRAMES WHICH ARE DESIGNED FOR A 65mm FLAT SET UP ROCKERED UP OR A FLAT SET UP OF MAX 68mm OUTER WHEEL WITH A 58mm OR IDEALLY A 64MM OUTER WITH A 54MM CENTER FOR STREET SKATERS WITH INNER WHEEL ROCKERED DOWN WHICH WILL ALLOW YOU TO RIDE FLAT WITH MORE CONTROL AND A LARGER GRIND AREA IN THE CENTER, WHEN ALL FOUR WHEELS ROCKERED UP THE GROOVES BETWEEN WHEELS 1-2 AND 2-3 WILL ALLOW FOR A LEVEL OF BLADING . please note these are t