You May be able to extrapolate somewhat using your current clearances, specs etc vs your proposed setup using a rim and tyre calculator eg willtheyfit.com
But bear in mind some tyres have a meatier shoulder than others in the same spec.
A9Y288 wrote:im running an 18x8 +43 with a 225/45 tyre with no issues and it fixed my speedo by about 5%
Thanks for that. I just bought some secondhand RE30's 18x7.5 +50 with S001 215 45 18 tyres.. This should clear big time hey. What I'm more excited about is the weight loss from stock 11.3kg (correct me if wrong) to 7.2kg wheels