Tyre & Wheel Selection

[Nismo_God]

I have a quick question and need ppls opinion. I have at the moment 19"x8 from and 19"x10 rears which are very heavy and tyres are expensive. Im going to the drags tomorrow night and I have a old set of rims.

My dilema is that there is only 2 good rims left from the old set and they are 17"x8 235 from the front and 17"x9 255 from the rears. Is it a bad idea to be running both these wheels on the rear of my car? will the difference matter? let me know as im a lil sceptical but the jury is still out and I need help!!

[Nismo_God]

Here is some more info...hope it comes out ok.....do u think it will be safe? or do anything to the car?

Tire 1 - 235/40R17         >Search Tires Tire 2 - 255/35R17         >Search Tires

Section Width: 9.25 in 235 mm Section Width: 10.03 in 255 mm

Rim Diameter: 17 in 431.8 mm Rim Diameter: 17 in 431.8 mm

Rim Width Range: 8 - 9.5 in Rim Width Range: Unrecognized tire size.

Overall Diameter: 24.40 in 619.76 mm Overall Diameter: 24.02 in 610.10 mm

Sidewall Height: 3.70 in 93.98 mm Sidewall Height: 3.51 in 89.154 mm

Radius: 12.20 in 309.88 mm Radius: 12.01 in 305.05 mm

Circumference: 76.65 in 1946.9 mm Circumference: 75.46 in 1916.6 mm

Revs per Mile: 852.4 Revs per Mile: 865.9

Speedometer1: mph km/h Speedometer1: 60.9 mph 101. km/h

Speedometer Difference: 0% Speedometer Difference: 1.583% too fast

Diameter Difference: 0% Diameter Difference: 1.56%

[mad082]

don't run 2 different size tyres on the rear. the diff won't like it much. and you'll get uneven grip off the line.

[Nismo_God]

thanks for the input.....anyone else? really want to know for sure....other then that its back to the 19"x10 and burning some expensive rubber