I have done several years of research trying to figure out all the little problems that create wheel leans because right off the bat you have about 90pnds of force on one side of the cam but there are several things in a bow that create wheel lean here is a few axle holes as moose said,bushings,pocket to riser fit riser, end cut a few degrees off then when pocket slides on sits at angle,when the pocket does not fit tight on riser it allows lateral movement and a 3/32 at the pocket can be 1/8 at the limb tips and when the limb comes out of the pocket at this slight angle it puts more stress on one side or the other which ever way it is leaning which is always to the right on a right hand and to the left on a left hand that is just a few and those are some of the main issues i have fixed on my Newberry bows so that you have true center shot and no wheel leans thank you Richard Newberry