'92 stock tire size was 205 on the front and 225 on the rear and mfg recommended tire pressures are 33 front 40 rear. Because I have increased my tire and rim size and now I am running 225 width in the front and 255 in the rear, what tire pressure should I use? A first order guess on my part is that I increased my width by 10% so to maintain the same length of tire contact patch size, I would need to lower the PSI by 10%. Is there anyone that knows the correct answer, or a place to go where I can find the correct answer.