SenecaRex

Hey all,

I have a set of 19 x 7.5" with +35mm offset. Can anyone tell me what are the biggest tires I can put on these rims to use with my bone stock GS300 suspension?
Right now I'm considering 225/40/R19. If I could go with something bigger/more sidewall without it rubbing, I wouldn't mind it. I'd like to keep as much ride quality as possible.

Note: For those gasping at the audacity of 19" rims on a stock car: I plan to drop about an inch in the future, but for now I just need to get these on since my stock rims and tires are completely shot!

These are the rims for reference: 2010 RX350 19" wheels:




Thanks!

firelizard

iTrader: (1)

You could do 235/40-19. If you had wider wheels, 245/40 is doable as a chunky setup. It's "too big" as it's larger than the largest factory size by several mm, but it would fit since your wheel specs and intended drop are mild. I have 235/40-18 (correct size for the car) and can't say I have any complaints about ride quality. It's really not a big difference from stock.

Wouldn't have recommended 19" wheels in the first place, if you're so concerned about ride quality (since you could do a 245/40 on an 18 and stay within spec), but if you're set on that diameter, it's still doable.

SenecaRex

Ended up riding 225/40/19, stays within overall diameter as 16" stock rim/tires. No Rubs, great ride quality.

kphu

iTrader: (8)

Just for future reference you should refer to a tire size calculator, this will give you a better idea of the differences.

Assuming your stock/oem tire size is 215/60-16, the calculator compares oem to the new specs you want to look at.

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
215/60-16 5.1in 13.1in 26.2in 82.2in 771 0.0%
225/40-19 3.5in 13.0in 26.1in 82.0in 773 -0.3%
225/35-19 3.1in 12.6in 25.2in 79.2in 800 -3.7%
235/35-19 3.2in 12.7in 25.5in 80.0in 792 -2.6%
235/40-19 3.7in 13.2in 26.4in 82.9in 764 0.9%
245/35-19 3.4in 12.9in 25.8in 80.9in 783 -1.6%

I got this from the following website.

http://www.miata.net/garage/tirecalc.html

It looks like you selected the best size to be as to close to oem specs but if you wanted to go with a wider tire and okay with a higher marginal difference then it'll let you know.

I'm running 245/35-19 no rubbing on my '02 GS430

Oceans13

Are you still riding those?

SenecaRex

Sold the car, but yes they rode fine with no issues.

Oceans13

Thanks. Did you need spacers? Im thinking of getting these for my GS300, love the look, worried about clearance

Oceans13