Hey Paul thx for the advice.... do u think so?? well , i do fell the weird smell when i speed a little bit, but the fact of stuck calipers wouldnt cause a vibration in the back of the car righ? couse i feel like my "ass" shaking hahaha , i mena, the whole car.like riding over trails . very weird . plus i do have a gap in the hub area , between the rim and the hub ... i'm almost sure that i need the hub centering ring, because it all started after i put those rims and tires . i'll try the rings, if i'm wrong AGAIN, i will do the brakes :) thx for the help buddy