[NismoPWR]

Hey guys srry if i double post this but i havnt found a good answer for want i want. Im interested in getting new rims. i currently have the stock 17" alloy rims. I remember when i put rims on my old car and bumped it up to 18" i lost about 40 miles on a tank compared to the stocks. I also felt bumps a lot more. Any feedback on low pro tires ? Any specific rim/tire size that increases performance/ gas. This my first car that i bought my self and i want to make it as personal as possible. thanks guys. BTW i tried to use the rim calculator but it wasn't much help for the answers i was looking for.