How wide are your wheels. Mine are 8 inches wide so the 225's are stretched out as it is. And your sidewall height is actually taller than mine, even though they are both 40s. The sidewall height is just a percentage of your width. My sidewall height is supposed to be 90mm but it's actually less since the tires are stretched. And your sidewalls are 98mm so a little bit of a difference. I can't wait to get my rims powdercoated and get a thicker tire on it.
They are Stern ST-11's and I beleive they are 8" wide.