I hope to change my wheels soon. I got an old bike cheap and it has steel wheels. They each have a little wobble to them but are serviceable. I changed the bearings and grease today but still think, because of the wobbles, that I want to change the wheels entirely. I think that aluminum wheels are lighter and more rigid, does that mean they are less apt to deform when my 200+ lb body slams over potholes? Are new aluminum wheels straighter than new steel wheels? Meaning having more precision so that I can set my calipers closer?