Justin Thomas

So i purchased this car back in November and it included winter tires on steel 15" rims, and also a set of summer tires, which i just checked the size as the summer tires are bald, and turns out they are 17" rims, the tires are 205/40Zr17 84H
So my question is, according to the door panel recommended is 185/65r15 89H
If i put these other tires on the car is this going to effect my Mileage? I always thought you could only go 1" up or down on the size of rim.

Or is it because you are going from 65 down to 40 and going from 185 to 205 this compensates for things?

according to wheel size site it shows

195/55R15 91H6Jx15 ET454x1002.1
205/50R16 91H6.5Jx16 ET454x1002.1
205/45ZR17 89W7Jx17 ET424x1002.3
will fit on the car

Thanks