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Discussion Starter · #1 ·
Hey All,

I am thinking about putting 245/40r19 on the front and 255/35r19 on the back I have the standard 19x8 all around. I know that the rear will not have any issues with the 255 but was wondering if anyone has changed the front ones to 245 and if they have any rubbing issues? If anyone has changed it before I would love to know if it worked for them.

Thanks!
 

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I just put on the QV rims all around last week and am currently running 245/35/19 up front , Lowered on Eibachs, so far so good after 400 miles
 

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Discussion Starter · #3 ·
I just put on the QV rims all around last week and am currently running 245/35/19 up front , Lowered on Eibachs, so far so good after 400 miles
Aren't QV rims different though? What size you got on the back?
 

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Hey All,

I am thinking about putting 245/40r19 on the front and 255/35r19 on the back I have the standard 19x8 all around. I know that the rear will not have any issues with the 255 but was wondering if anyone has changed the front ones to 245 and if they have any rubbing issues? If anyone has changed it before I would love to know if it worked for them.

Thanks!
Are you planning to use the 8-inch wheels that you currently have?
 

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Yes I will be keeping the 8-inch wheels.
Other than any potential rubbing issues, you might want to look into whether the 8-inch wheels are suitable for the wider tire sizes. The QF is using a 8.5-inch wheel for the 245 wide front tire and the Ti is using a 9-inch wheel for the optional staggered 255 tire.
 

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Discussion Starter · #7 ·
Yeah I checked and they should be fine for wider tires the only thing I can't make sure if it will rub or not so that is why I asked. I guess I kind of have to risk it, order it and put it on to see if it will rub.
 

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Discussion Starter · #11 · (Edited)
On both factory 19x8.5 wheels (QV) and aftermarket 18x8.5.
You kinda need 8.5, 8 is a bit narrow for 245.
Hmmm...I was told 255 should be fine on 8 inch as i am going to be doing 255s in the back. I was at first gonna go for 235/40r19 on the front but i couldnt find Hankooks that were 235/40r19, only 235/35r19 and i dont want to do 35s for the front so due to that i bumped it up to 245/40r19 and since they said 255 fill fit with no problem on the 8 inch i thought 245 should be no problem at all then and only was afraid of rubbing issues for the 245
 

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Hmmm...I was told 255 should be fine on 8 inch as i am going to be doing 255s in the back. I was at first gonna go for 235/40r19 on the front but i couldnt find Hankooks that were 235/40r19, only 235/35r19 and i dont want to do 35s for the front so due to that i bumped it up to 245/40r19 and since they said 255 fill fit with no problem on the 8 inch i thought 245 should be no problem at all then and only was afraid of rubbing issues for the 245
Is there any particular reason you want 255 in the front?

Is it just for looks or are you doing it for perceived performance benefit as well?
 

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Discussion Starter · #13 ·
Is there any particular reason you want 255 in the front?

Is it just for looks or are you doing it for perceived performance benefit as well?
I am doing 245 in the front. 255 is going to be in the back. Looks, performance, handling and also those 225 tires look terrible and they really should have not put 225 tires on that car.
 

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Hmmm...I was told 255 should be fine on 8 inch as i am going to be doing 255s in the back. I was at first gonna go for 235/40r19 on the front but i couldnt find Hankooks that were 235/40r19, only 235/35r19 and i dont want to do 35s for the front so due to that i bumped it up to 245/40r19 and since they said 255 fill fit with no problem on the 8 inch i thought 245 should be no problem at all then and only was afraid of rubbing issues for the 245

Rubbing won’t be an issue.
Fitting a much wider tire to the same rim, though, might.
Ideally 245 should have 8.5” rim and 255 9”
You might be ok fitting a 245 on a 8” rim but 255 is stretching it, especially if you’re looking for performance. A couple 9” OEM rims should be $600 or less on eBay
 

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2018 Q4 with Fiamenghi Ti exhaust, Race Mod, and Tecnico wheels.
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I am doing 245 in the front. 255 is going to be in the back. Looks, performance, handling and also those 225 tires look terrible and they really should have not put 225 tires on that car.
Mismatched tire diameters front and rear could trigger problems with traction control.
QV uses 245 35R19 and 285 30R19 because the combination is very closely matched in diameter.
Staggered RWD uses 225 40R19 and 255 35R19 again because the combination is very closely matched in diameter.

Tire rack says the minimum rim width for 255s is 8.5".
Multiple racers say that for maximum performance, get a rim that is slightly wider than the tread of the target tire (8" for 225s, 9" for 245s and 9.5" for 255s). They also say go as light as possible. Of course these two criteria contradict each other, and AR obviously chose 8.5" for the 245s and 9.0" for 255s.

If you decide to try 245 40r19 in the front, please let us all know if it fits. These are larger diameter than stock, but seem like a good compromise for winter tires to fit on my OEM 19x8 5 hole wheels (either that or stick with 225 40R19 for winter).

Known to work combinations include

225 40R19 all around on 8" rims (factory)
225 40R19 front with 8" rims, 255 35R19 rear with 9" rims (factory)
255 35R19 all around with 9" rimes (Racer Z's setup)
245 35R19 front with 8.5" rims, 285 30R19 rear with 10" rims (factory QV, installed on 2.0T)

Note that the Tecnico rims are about 5 pounds lighter each than the 5 hole 2.0T rims, so with the QV setup installed on a 2.0T you can have it lighter and wider in spite of the heavier tires.

Some other folks on the forum have gone with 18" and 17" wheels instead of the 19" OEMs. For the same money it seems that the smaller diameter wheels are lighter, even after including the tire weight. The main "gotcha" is that high-end super light wheels are tough to find in 18" and 17" diameter, wide sizes, so that in a "cost be damned" approach you are still more likely to find lighter weight 19" wheels.
 

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Mismatched tire diameters front and rear could trigger problems with traction control.
QV uses 245 35R19 and 285 30R19 because the combination is very closely matched in diameter.
Staggered RWD uses 225 40R19 and 255 35R19 again because the combination is very closely matched in diameter.

Tire rack says the minimum rim width for 255s is 8.5".
Multiple racers say that for maximum performance, get a rim that is slightly wider than the tread of the target tire (8" for 225s, 9" for 245s and 9.5" for 255s). They also say go as light as possible. Of course these two criteria contradict each other, and AR obviously chose 8.5" for the 245s and 9.0" for 255s.

If you decide to try 245 40r19 in the front, please let us all know if it fits. These are larger diameter than stock, but seem like a good compromise for winter tires to fit on my OEM 19x8 5 hole wheels (either that or stick with 225 40R19 for winter).

Known to work combinations include

225 40R19 all around on 8" rims (factory)
225 40R19 front with 8" rims, 255 35R19 rear with 9" rims (factory)
255 35R19 all around with 9" rimes (Racer Z's setup)
245 35R19 front with 8.5" rims, 285 30R19 rear with 10" rims (factory QV, installed on 2.0T)

Note that the Tecnico rims are about 5 pounds lighter each than the 5 hole 2.0T rims, so with the QV setup installed on a 2.0T you can have it lighter and wider in spite of the heavier tires.

Some other folks on the forum have gone with 18" and 17" wheels instead of the 19" OEMs. For the same money it seems that the smaller diameter wheels are lighter, even after including the tire weight. The main "gotcha" is that high-end super light wheels are tough to find in 18" and 17" diameter, wide sizes, so that in a "cost be damned" approach you are still more likely to find lighter weight 19" wheels.
I agree with lockem, the 245 tire can be technically fitted on the 8" rim but the optimal rim width is 8.5". If you go to tirerack you can look up the recommended rim widths for each tire by clicking on the Specs tab.
Just out of curiosity I looked up Continental Extremecontact DWS, which for the 245/40 R19 tire lists Rim Width Range: 8-9.5", Measured Rim Width: 8.5". For 255/35 R19 it lists Rim Width Range: 8.5-10", Measured Rim Width: 9".
The other thing what lockem has also mentioned is that the 245/40 R19 tire is slightly larger than the 225/40 R19. According to the wheel size calculator the overall wheel diameter of the 245/40 R19 tire will be 16mm or 2.5% more than the original. That will help with reducing the wheel gap, but it will raise the car's ride height by 8mm. If you decide to go with the setup please post some pictures. I'm also interested to see how that will look because I would love to reduce the wheel gap and give the wheel some more sidewall protection.
 
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