Why do my tires shimmy when at speed and in a turn

Could be several things, including a bad tire or bent rim.
A shimmy usually starts after you hit a bump, which would point to a loose tie rod end or ball joint instead of the tire/rim.

Out of balance tires, or tread wear, or you hit something that has miss aligned your front steering system.

Sounds like you have a bad wheel bearing and or possible worn Tie rod ends. jack up front end of car and grab wheel on top and bottom and try to wiggle it also try by grabbing on the sides of the wheel. If you have play there you better get your wheel bearings changed. Your tires are probably showing wear on the tire that has bad bearings or bad tie rod end.

Sounds like you have a bad strut mount causing the rattle. I would replace the struts and strut mounts and get an alignment.

Could possibly need the steering box adjusted. It might be a little loose. And tire balance usually makes it shimmy. Could have a broken belt in one of the tires. Jack up the wheel and spin the tire and check the run out. (look for a wiggle when spinning the tire).

try changing the tires . you may have a broken bead in a tire, which flattens when you hit higher speed.

Yep tie rod ends both control arms and a frame bushings. If you had time and could send some pictures I could be more presise and could give you a detaild ideal on how to test the entire front end, but you do not seem to want a lot of help as this would require me to give you two hours of instruction and testing parts that you are not aware of..

Usually if u can drive into and out of a shimmy it is tire problems, usually balance. It can happen at diffenent speeds. The "shimmy" is the tires bouncing.

Haha the death wobble replace the steering dampner or shock on the lower tortion bar of the suspension with an heavy duty upgraded one. Not a difficult repair check the tortion bar bushing for play. But the death wobble is caused by the steering shock. Seen it a lot fixes it every time. Hope the info helps rate it please.

i also agree with emissiowiz about the tires also checkout the struts and the upper strut mount as well.