Rellgeta

iTrader: (2)

Hello. I would like some info.. I have a 99 gs300 white. I have 20inch rims (I HATE THESE) IT CAME WITH THE CAR. I want to do like an 18 inch rims and i came across these.. there 18x8 with 45mm offset. it came off a GS350 will these fit?? I am not trying to mod or anything.. I just want the smooth ride and more mpg.. I know 20's are too big for what I want.. I want to get them tomorrow if I can get some answers today.. Please it would be very helpful.. and if that can be answered can this too??? TIRE SIZE that would be great for the rims

the pics are for the 18 inch rims..

AJ@TireRack.com

While I can't say if the other factory wheels will fit, I can offer assistance in tire fitment, should they fit.

Going to a smaller wheel will increase some road comfort because you are adding sidewall height. Tire selection will help the MPG.

If the 18x8" wheel is okay for your vehicle, consider a tire that has low rolling resistance technology as part of the tire. Low rolling resistance (LRR) means just that. The tire tread design and compound are designed as such that it requires less energy to move the tire. That translates to you as better MPG.
We did some testing with different tires a few years ago and the info can be found here.

I would recommend the 235/45/18 tire size for a 18x8 wheel on the 99 GS300:

Continental Pure Contact
Michelin Primacy MXM4
Pirelli Cinturato P7 All Season Plus