Usually, the stiffer the frame, the better it transmits power. More power means more speed. Extruded aluminum frames are laterally stiffer than stamped aluminum frames, so transfer of energy between the skates and the pavement is more direct. There are also some other frame hybrids out there that are pushing the metallurgic envelope. The kind of skating you want to do determines the length of frame you should look for on a pair of skates.
Short frames are better for quick starts and fast, agile turns.
A longer frame gives you better stability when going over obstacles and maintains speed better on those longer fitness rolls. K2 is always looking for skaters who have what it takes to become a sponsored athlete. Our team is made up of a group of athletes who live a 'go big or go home lifestyle' which is made obvious when you see them pushing the envelope in any park or city they can find to skate. Include an email address and Mike will let you know where you stand. If you aren't sure just how good you really are check out our events listings and make sure to visit one of our sports ambassadors on their national tour of skate parks.