new rims =help

i just put a set of 22 x10 inch rims on my 05 gmc sierra with toyo tires 305 40 22. my question is how do i get rid of the bouncing when i hit the brakes it gets to the point that my dash bounces any suggestions would be appreciated.

other than having too much air in the tires, why would your wheels make your truck bounce? I guess I don't understand the question

are you sure it isnt vibration? the big wheels/tires need more stopping power, might have warped rotors up front.

someone had told me about tha warping rotor problem but how fast would that show up cause this started within hours. other than that it rides fine. i am kind of lost what can i do to fix or prevent this