tire size
 

ok I am completly stupid when it comes to tires, but I do know that using the wrong size can screw up your speedo.
so I was wondering, its almost time for me to get new tires(well its actualy beyond time) the previous owner of my car put 245/50r16's on it, but the label in side the drivers door says the car should have 235/55R16's. does that size diffrence change the speedo any? Im wondering, because I live in a town that is a known speed trap, and the cop's here pull people over for doing 1mph over the speed limit so I cant afford for my speedo to be off at all. any info is appreciated :hail: