xbone

Wanted to try a set of rims I hadthat have 245/45/17 tires instead of my stock235/50/17's, went to this website to figure revs per mile, http://www.discounttire.com/dtcs/infoTireMath.dos punched the number in my SCT2 and voila, corrected speedo. Thats why tuners are so important for these cars, any little change requires a tuner.

jay0heavenly

good post, I'm gonna do mine later this weekend.

06GT4RAD

XBone great freakin link. And for those that are always saying a 285/30/20 is to little sidewal Well here is the differance between the 285/30 and the 245/35 i run. I have been trying to tell people that the two sidewalls are identical and that confirms it.

Crap it did not post the info. Ok let me see if i cna figure this out.

Richard








Fill out this section if you would like specs on just one tire size.
What size is being run now?
285/30/20


Would you like to compare it to another size? Enter new size below.
What size would you like to run?
245/35/20









Results

Totals are in inches

Tire 1Tire 2 Difference



Sidewall Height: 3.37 3.38 .01




Section Width: 11.229.65 -1.57




Overall Diameter: 26.73 26.75 .02




Circumference: 83.98 84.04 .06




Revs per mile: 778.15 777.57 -.58

POWERS

Do you calculate your speed from the front or the rear tires?