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synolimit · 05-14-2022, 12:37 PM

Just curious, who’s done a different wheel and tire combo?

If this was a video game and we went by rule of thumb only, what would happen if we went from the oem 19x11 19x12 305/30/19 325/30/19 to a 18x11 18x12 315/30/18???

The tires are now square, we gain 10mm in the front, lose 10mm in the rear, but it’s not a real square setup because mounted on different size wheels will affect the tire a little. We also lower the car over a 1/2” but total diameter is over 1”. And we drop a little weight on rotational weight.

Obviously dropping rotational weight is great all around. Lowering the car probably also great for aero and handling. But what affects will happen with a square tire and having the diameter greatly change?? I’m assuming horse power might pick up, speedo will be way off, and will I get more under steer? Over steer?

05-14-2022, 12:37 PM	#1
synolimit Drives: 22 ZL1 1LE A10 Join Date: Feb 2022 Location: Ohio Posts: 233	Different wheels and tire comb?? Just curious, who’s done a different wheel and tire combo? If this was a video game and we went by rule of thumb only, what would happen if we went from the oem 19x11 19x12 305/30/19 325/30/19 to a 18x11 18x12 315/30/18??? The tires are now square, we gain 10mm in the front, lose 10mm in the rear, but it’s not a real square setup because mounted on different size wheels will affect the tire a little. We also lower the car over a 1/2” but total diameter is over 1”. And we drop a little weight on rotational weight. Obviously dropping rotational weight is great all around. Lowering the car probably also great for aero and handling. But what affects will happen with a square tire and having the diameter greatly change?? I’m assuming horse power might pick up, speedo will be way off, and will I get more under steer? Over steer?