The insert greatly increases the precision of your truck by limiting side to side movement of the hanger, increasing rebound, stability, and steering. You can expect to run a softer durometer than your previous set-ups. Hardcore bushings will improve the performance of any longboard trucks.
85A GREEN/RED - Softest - for 100lb - 200lb - carving / cruising / freeride / DH
88A WHITE/RED - Mid range - for 140lb - 220lb - cruising, freeride or DH
90A RED/RED - Upper mid range - for 160lb - 240lb - heavier riders, or DH / freeride
93A BLACK/RED Hardest - for 180lb - 300lb - heavy riders, extra stability or DH / Freeride
-Patented bonded-insert technology
-More precise steering
-No break-in period
-The BEST bushings, period.