My stock tires and rims are 215/50/17 with a 55 or 60mm offset. The rims I found are 18x8 with a 40mm offset and I will be running a 215/45/18. The tire are pretty close and won't affect my spedometer. With this setup at 60 mph I will actually be doing 60.4. But will the 18x8 40mm fit correctly? Also will I have to roll my rear fenders at all? Please only experts or anyone that knows first hand. There are a few people that say they will fit and a few say they won't, so any help is appreciated. It is a 2004 Mazda 6 sport sedan(not speed6)