i'm ancient and weak in the knees, feel me? but i been skating a different set up and decided to take the old set up, the loosey goosey thing out and upon picking it up sed "fuhk this is crazy lighter. wut da fuhk is going on. new set up has 54s, phresh aces, and is a 1/4 narrower..." could grinding to axle on both trux have made such a difference when the other set up had 56s and is a 1/4 wider? HAH no. hollow trux my dudes, hollow trux made it quite lighter. if you're weak in the knees like you were at that high school dance, get some hollows.