MrFuso

Seen your car on YT and like the Tanabe exhaust, that's probably what I'll go with as well. Question, where did you get your carbon tips at? Thanks!

finny76

So if one were to simply go up a size on the OE wheels/specs, would that work or is that not advisable?

Fronts: 255/35/19
One size up:265

Rear: 275/35/19
One size up:285

lobuxracer

iTrader: (2)

You need to maintain the same diameter +/- 2%. Generally speaking a 2% change won't cause a difference you'll notice unless you are at a timed event, and even then driving inconsistency will likely be a bigger factor. One size up as you suggest puts you well within the 2% change window, so it would likely be just fine for all but the most discriminating purposes. The closest "next size up" for the front and rear are 295/30/19 and 325/30/19. Both want much wider than OEM rims, although you could try stuffing the 295s on the OEM rear wheels. Then the offsets would be the problem, and you're still looking for an 11.5" rim for the back. Ideal rim widths for the upsize is 10.5 front and 11.5 rear.

flowrider

iTrader: (9)

^^^^295/30 fits and works just fine on the 10" RCF rear wheel, and is within mfg. recommendations, but as I said above messes with the stock front to rear stagger on the RCF.

Lou

CZ75

Can anyone tell me if just going up a size on the rears would be ok? My rears are shot and i found a set of OEM's but in 285 instead of 275 here locally for a good price.

1wacko

it would be fine, i went one size up on both the front and rear. my set up currently is 265/35/19 front and 285/35/19 rear on Michelins PS2s. i went with the PS2s because I could not find what i wanted in PSSs nor PS4s. i have this setup for the past year almost with no issues.

CZ75

ok but just up a size on the rears only? My fronts are still pretty much new. Would that be alright? Or would it upset the vehicle?

1wacko

it would be fine; you can go one up on the rear only.

CZ75

Thank you.

lobuxracer

iTrader: (2)

What are you expecting to achieve with wider tires on the OEM wheels? That's way more important than can the tire shop mount these tires on the rim. LOTS of different sizes can be mounted on the rims, but the impact they have on the car will vary widely.

CZ75

Nothing, other than I found a new set for $300 less than 275’s.

lobuxracer

iTrader: (2)

The one thing I won't go cheap on is tires. They make the biggest difference in how the car performs, and if they don't perform, you're out your deductible at best or your car at worst. Decide if saving $300 is more important than running the standard sizes and you have your answer.

CZ75

I’m not “cheaping out”. It’s a brand new set of Pilot Sport 4S’s, just up one size. For daily driving, I don’t see how it would cause an issue going up one size in the rear.

Literally the percentage diameter difference to the original is 1% more. No way that’s going to cause issues driving to and from work and general putting around town.

lobuxracer

iTrader: (2)

I just did a search for PS4S looking for 255/35/19s and Tire Rack had 6 different models all the same size with dramatically different prices ranging from $297 to $370. I never expected that. There are 11 max performance Michelins in this size from Pilot Super Sport to PS4 to PS4S. It's crazy. I run 255/35/19 on the front of my IS F because they're the same diameter as the OE size but 30mm wider, and they work with the 8 1/2" OE 2014 wheels. Going one size wider means the diameter is larger or maybe smaller depending on the aspect ratio you pick. In either case, it changes the suspension geometry and changes the way the car drives. Some people notice it instantly, others never notice anything. It all depends on how you drive.

The GS F wheels are wide enough to go wider, but you typically have to go a lot wider with a lower aspect ratio to get the same diameter as the OE tire, and the suspension was designed around that diameter tire. Again, you might not notice anything, or (as I did with my Supra rear wheels on my 2IS) you might think the car's handling is all screwy.