996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

19" Wheel/Tire Question again......

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Old Jul 12, 2013 | 06:52 PM
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19" Wheel/Tire Question again......

Hello Everyone,

I just picked up about 3 weeks ago a 2001 996 Turbo Gaurds Red approx 75K KMS (I reside in Canada). Stock other than tints and rims.
Mods are coming slowly of course.
New rims were put onto the car by the dealership about 2 months ago which are 19" Victor Equipment Innsbruck (Matte Black) which look great by the way. But the dealership put on used tires on the rims which I know are incorrect. Previously the car always had aftermarket 18's on it.
Currently they are 295/30/19 (R) and 235/35/19 (F).
Wheels are 19x8 (F)(45 offset) and 19x11 (R) (36 offset).
I am changing the tires and want to run 305/30/19 and 245/35/19.
I have been advised this will work much better in ratio for the AWD system.
I do not want to go the 315 root with rears. Hard tire to get in Ontario (Very limited with choices).
Anyone running the same specs on 19's?
Any issues with rubbing and/or wear?
I'm also going to lower the car with H&R lowering springs (1" drop) and adding sway bars, etc. (2 of the shocks are brand new - just installed and the other 2 are in good conditions hence why I don't want to spend the money on coilovers right now).

Greatly Appreciated Guys.
Love the car and I am enjoying giving it my personal touches.
Rob
 

Last edited by sexirob; Jul 12, 2013 at 07:26 PM.
Old Jul 12, 2013 | 07:56 PM
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I run 19s with diff blowing () 235/35 and 305/30 setup and its all good. 245 will be my next set of fronts to get a closer ratio but I'm not overly concerned as its mostly hear say anyway. There is nothing wrong with your 295 / 235 setup, it's perfectly fine.

I'm gonna lower on H&Rs and expect a bit of rubbing but will roll my fenders, no big deal.

Im in Woodbridge, where are you?
 
Old Jul 12, 2013 | 08:15 PM
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I'm in Stouffville, ON.
So you think if I go to 245's on the front and 305's on the rear I'm going to get a little bit of rubbing?
I really don't want to roll the fenders.

I'm looking at Falkens FK453 as I heard pretty good things about these tires without breaking the bank. Not tracking the car, street use only.
 
Old Jul 12, 2013 | 09:01 PM
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I'm so confused....
Looking at the Falken FK453 specs:
245/35/19 = 25.8" diameter
305/30/19 = 26.2" diameter
That's 0.4" diameter difference
I was told this was fine.

But why not do the following:
245/35/19 = 25.8" diameter
295/30/19 = 26.0" diameter
That's 0.2" diameter difference

Wouldn't the 2nd combo work closer to the ratio for less potential AWD issues?
Also less chance of rubbing in the rear when I lower the car.
Any assistance would be greatly appreciated.

I'm currently running 235/35/19 and 295/30/19 and I feel like after reading all the forums it's not the correct setup and should change it asap though the car feels great. No rubbing, etc.

Thank You Gentleman!
 

Last edited by sexirob; Jul 12, 2013 at 09:07 PM.
Old Jul 13, 2013 | 06:48 AM
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Either one is fine, I don't rub with 305 and lots if guys are lowered with that size. The largest contributing factor is your wheel offset. These cars (GT2) come with 315 in the back and lots of normal Turbo cars run that size with no issues. I just like the 305, it's preference.

If your concerned about the ratio the 295 will be better. I dismiss the ratio bit cause its a lot of Internet hearsay and theory / guessing. There are tones of guys running with 3% difference front to rear like myself for a long time with no issues. Some say better safe than sorry, a valid outlook but to each their own.
 
Old Jul 13, 2013 | 11:46 AM
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I also run 305 and 235 on 19" and do not have a problem.

BUT then again I feel my front wheels do not even work coming to traction!

King James we need to get together sometime, being I work in Woodbridge and live in Brampton. Sexirob you would be more then welcome as well, we can have a mini Porsche meet, being my uncle has a X50 as well!


Thanks

Bobby Ali

ba
 
Old Jul 13, 2013 | 05:26 PM
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Sounds great, we can try the mini meet in August!
 
Old Jul 13, 2013 | 06:19 PM
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I'm in. We could meet at Magnus and see if Urban Hotrods car is still there lol.
 
Old Jul 13, 2013 | 06:57 PM
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Sounds good!

Thanks

Bobby Ali

ba
 
Old Jul 14, 2013 | 06:05 AM
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Here's a quick read of what I found while I was searching tires:

https://www.6speedonline.com/forums/...ml#post3872935
 
Old Jul 14, 2013 | 06:57 AM
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Thank you KJ. I think I like the wider 305 over the 295. I think I'm going to go with either the 245/35 up front or 225/40 up front matching them with 305/30 in the rear. Lowered 1 inch with h&r springs and an alignment of course. Next spring I will add the sway bars and toe links.
On a side note, where can I get the GT2 deck lid wing in Canada if possible? There are some great U.S. companies like misha that make them but any companies in Canada?
 
Old Jul 14, 2013 | 06:59 AM
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Thanks KJ. On a side note, where can I buy the GT2 deck lid wing in Canada if possible? I know companies like Misha make them but any in Canada to avoid the big shipping charges? Thanks!
 
Old Jul 15, 2013 | 02:33 PM
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I actually have been shopping for tires and am in exact same scenario.

I looked up the OEM tires on tirerack and found this:

Potenza S-02 A(Max Performance Summer)
Front: 225/40ZR18 ------ Diameter: 25.3"
Rear: 295/30ZR18 ------- Diameter: 24.9"

^ That gives us a 0.4"inch difference.. which leads me to believe as long as you're within that range you should be fine. Also, it might be worth noting that this assumes your front diameter is slightly taller than your rear diameter. The inverse might cause damage?

Anyway, for 19"wheels tirerack recommends
Front: 225/35ZR18 ---- diameter: 25.2"
Rear: 315/30ZR18 ----- diameter: 25.2"

A very rare and expensive combo.

I'm personally not doing any racing and have no need for such extremely sticky rubber. Trying to find a more cost effective solution that still keeps the diameter within 0.4" i found the following:

245/35ZR19 ---- diameter: 25.8"
295/30ZR19 ---- diameter: 26"

^ Tires in these sizes can be found much more readily available, and for nearly half the price. This may even increase driving comfort as the overall diameter is almost an inch taller. But this presents several questions

1) Will the increased diameter cause a problem? ie) rubbing, or diff issues
2) Can 245's fit upfront without rolling the fender, if so what offset is needed?
3) Does having a larger diameter tire in the back vs the front present a problem?

So the other alternative I found is:
Front: 235/35ZR19 ---- diameter: 25.5"
Rear: 315/25ZR19 ----- diameter: 25.2"

^ This keeps the same difference as stock, but gives us a couple more tire combinations. like Toyo Proxes T1R. But that doesn't even really save much money.

I think i would prefer the 245's up front, but those 3 factors are very concerning to me.
 
Old Jul 15, 2013 | 03:50 PM
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Can anyone advise if having 245/35/19 up front and 305/30/19 in the rear with 19x8 and 19x11 wheels will rub? I don't want to roll the fenders. Anyone running this set up currently? Greatly appreciated!
 
Old Jul 17, 2013 | 09:41 AM
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I can tell you that with as low as my car is, I had to have the fenders rolled. At stock height I can't say if they rub or not, but I'm lower than stock.

James
 


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