J2S2M

iTrader: (22)

Would it be a bad idea to run 245/35/19s up front and 255/35/19s in the rear on the sport OEM 19s (F19x8.5 & R19x9.0)? I happen to have these tires in hand from my previous set of wheels, and wanted to see if it would be possible to run these sizes without any safety issues. According to the tire size comparison, it's +4% difference in size up front but the rear seems pretty similar in over diameter.

Any advice is appreciated.

Thanks in advance.

-Jason

Kidcane

iTrader: (7)

I cant say first hand but really dont see any reason why those wouldnt work.

nukee26

I see no issues with doing that.

jujubii

iTrader: (5)

4% is somewhat significant, as 5% is as far as you want to go according to 1010tires
the end goal is to try and match the new tire's revolution per mile to the original tire's revolution per mile to accommodate for speedometer accuracy. the diameter doesnt matter as much because the different properties of each tire affects its actual rev per mile.

so to answer your question, it probably would work and it would be safe (to an extent) but your speedo might not be accurate.

G37Q8

They will fit, car will be fine however, any slight change in the pavement surface will be felt with the steering wheel, i had wide tires on my wheels before (wider than recommended) and every time i drive in bad road (pavement wavy because of Floods or heat) the car would stray and feel a big force steering my car against my will, never had that problem ever since i used recommended size... but US has way better roads than here so no problems i assume, unless you gonna track it... if so don't do it.

nukee26

He says the fronts are the only tires that have a larger diameter. If that's true then shouldn't that leave the speedometer unaffected as it's fed by the drivetrain?

devious1

iTrader: (4)

u should be fine...
it will also depend on how low u are on whether the height of the sidewall will rub or effect anything (if thats what ur asking)

im running 20x10 up front with 245/35/20 tires
and 20x10.5 on the rear with 255/35/20 tires
im also slammed on coils and a nice amount of camber

devious1

iTrader: (4)

i think i read it wrong lol
didnt see that u said oem sport wheels and thought u were talking aftermarket...

with that being said, my response would resemble JuJu's

Mayu

You will be +4.5% at the front and +2.5% at the rear.

Odd since, I get a warning that you should not exceed +/- 3% on 1010 Tires website for Brake operation reasons:
Tire Size Calculator - tire & wheel plus sizing

Not sure if the discrepancy between front and back would also interfere with VDC.