Buy different trucks,  Monday, 23 March 2009 I got these trucks on my board for the purpose of hauling A$$.. big mistake... they came with yellow springs, on flat ground good stuff a great ride very responsive great turning radius, went bombing... no bueno.. at high speeds got the wobbles even after tightening all the way.... bought higher tension springs(black set and purple set) Hard as @#$! to get on took the help of anther human and a retarded long time just to get the springs set then because of the tension i stripped two king pins and nuts trying to put the trucks back together... got replacement pins and nuts tried it again with to no avail... gave up put the yellow springs back on now i have the trucks on a old school powell deck that i use for standard flat ground commuting... Wahwahwahwahhhh