225/45/18 versus 245/40/18

For my next tire change. Thinking about this size. While going up in width (245 versus 225) will make tire larger, by reducing aspect ratio (40 versus 45 ) size will add width without diameter. Not compromising wheel well.

Tire Size Comparison Calculator


Size 1
225 / 45R 18

Size 2
245 / 40R 18

Compare
Size 1 Size 2 Diameter 26" to 25.7" A -1.2% reduction.

Width 8.9" versus 9.6" A +7.9% gain

Sidewall 4" versus 3.9" A -2.5% reduction

Circumference. 81.6" versus 80.7" A -1.2% reduction.

Revs/Mile 777 versus 785 A +1.2% increase


Because adding width (245 versus 225) while keeping the stock aspect ratio (45) would render tire too big.


Tire Size Comparison Calculator

Size 1

225 / 45R 18

Size 2

245 / 45R 18

Compare

Size 1 Size 2

Diameter 26" versus 26.7" A +2.7% gain

Width 8.9" versus 9.6" A +7.9% gain

Sidewall 4" versus 4.3" A +7.5% gain

Circumference. 81.6" versus 83.8" A +2.7% gain

Revs / Mile 777 versus 756 A -2.7% reduction.

Anyone tried this 245/40/18 on stock wheels ?

225/45/18 versus 245/40/18