Kizer's new fluid frame design takes the classic fluid frame design and moves the center wheels out to create one of the nicest stock grooves ever put on a frame. This groove and spacing on the center wheels really helps if you are skating a flat set up (8 down 54-53mm works best) and helps even more if you are looking for the widest anti-rocker gap in the biz. Kizer has stuck with the Nylon Zytel material because it is one of the most durable, fastest sliding plastics available. The Kizer Fluid 3 frame also features a new sidewall shape that makes soul grinds slide much faster due to lack of surface contact.