Question on tire sizes

[Reek09]

If I run 225/40/18 in front and 245/45/18 in the rear would it negatively affect my car? ?

[Bluerauder]

If I run 225/40/18 in front and 245/45/18 in the rear would it negatively affect my car? ?

You might be OK with that combination as far as interference with the Traction Control. The difference in tire height front to rear is about 6.3-6.4%. Just slightly outside the accepted 3-6% range. However, the % difference is pretty close to the 255/55/18 and OEM 235/50/18 combo that I ran for awhile with no problems. Check the height and revs for your specific make and model tire. The estimated values are:

225/40/18 is 25.09 inches tall (804 revs per mile)
245/45/18 is 26.68 inches tall (756 revs per mile)

From a performance and handling standpoint, I would think that the narrower and lower profile tire up front would be prone to more understeer as compared to the OEM sizes.

[Reek09]

You might be OK with that combination as far as interference with the Traction Control. The difference in tire height front to rear is about 6.3-6.4%. Just slightly outside the accepted 3-6% range. However, the % difference is pretty close to the 255/55/18 and OEM 235/50/18 combo that I ran for awhile with no problems. Check the height and revs for your specific make and model tire. The estimated values are:

225/40/18 is 25.09 inches tall (804 revs per mile)
245/45/18 is 26.68 inches tall (756 revs per mile)

From a performance and handling standpoint, I would think that the narrower and lower profile tire up front would be prone to more understeer as compared to the OEM sizes.

Cool.. I have an 03 no TC

[RubberCtyRauder]

They will look very small in the wheel well, if you lower it, it would help some in that area.