Hey guys need some help. I have a 2006 Accord EX-L V6 on stock 215/50/17. I have a friend selling his mille miglia evo 5 rims - 245/40/18. It's the same lug pattern.Is this tire too big, or is this not as a drastic move as I think it is? I just wanted to find out the cons of moving to a bigger tire and rim? Thanks in advance for your help.

 

Google "tire calc" and click the first link. That will answer all your questions.