275/35/18 tire up front & 305/35/18 Rear.... (can it be done?)
04-24-2011, 01:24 PM
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275/35/18 tire up front & 305/35/18 Rear.... (can it be done?) Ok.... Have Mickey Thompson drag radials on rear 305/35/18's
Have 255/40/18's gsd3's up front & it has worked out fine.
I'm gonna need some new front tires & I have 2 nearly new gsds's that were left over from the past ( 275/35/18's )
So I thought if I could use these in front I wouldn't have to buy new tires for up front.
In the past I've always kept tire diameter to less than 3% difference front to back & have never had a problem with stability control or ABS systems
So, I'm asking if anyone has gone over 3% diameter difference front to back ? ( this would be like 3.15%)
And has anyone run 275/35/18's up front "without rubbing" ?
Have 255/40/18's gsd3's up front & it has worked out fine.
I'm gonna need some new front tires & I have 2 nearly new gsds's that were left over from the past ( 275/35/18's )
So I thought if I could use these in front I wouldn't have to buy new tires for up front.
In the past I've always kept tire diameter to less than 3% difference front to back & have never had a problem with stability control or ABS systems
So, I'm asking if anyone has gone over 3% diameter difference front to back ? ( this would be like 3.15%)
And has anyone run 275/35/18's up front "without rubbing" ?
Last edited by skydiver; 04-24-2011 at 08:19 PM.
04-24-2011, 03:29 PM
#2
I don't have a definitive answer, but would imagine the tires would rub on turns and such, although that is considering oem wheel offset/size and not sure what yours are (but like those wheels btw)...
I suppose you could take a really close look at what you have now and add the extra width/diameter in your head, so to speak, but remember that it will be a different case (worse) when the car is moving and has its weight shifting around and bumps/other road conditions, if that makes sense.
I suppose you could take a really close look at what you have now and add the extra width/diameter in your head, so to speak, but remember that it will be a different case (worse) when the car is moving and has its weight shifting around and bumps/other road conditions, if that makes sense.
04-24-2011, 04:10 PM
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I don't have a definitive answer, but would imagine the tires would rub on turns and such, although that is considering oem wheel offset/size and not sure what yours are (but like those wheels btw)...
I suppose you could take a really close look at what you have now and add the extra width/diameter in your head, so to speak, but remember that it will be a different case (worse) when the car is moving and has its weight shifting around and bumps/other road conditions, if that makes sense.
I suppose you could take a really close look at what you have now and add the extra width/diameter in your head, so to speak, but remember that it will be a different case (worse) when the car is moving and has its weight shifting around and bumps/other road conditions, if that makes sense.
work & proves me wrong
04-24-2011, 04:18 PM
#4
Yeah, know what you mean and guess there's only on way to be 100% sure...
Do you have a tire shop nearby that may have a couple scrap tires they'd be willing to mount for you, to give you a better idea? Might cost a few bucks to have them do that (probably no need to balance if it's a test fit only), but may be worth it to answer for sure...
If you do that, perhaps jack up one side a little and do some turns and such to simulate the car turning under compression, so to speak...
If it can be done, sure would be cool! One of my only complaints on this car is the lack of tire, but still better than (not much though) the little skinnies my GTO came with (235/40-18), where it almost made it dangerous, lol.
Do you have a tire shop nearby that may have a couple scrap tires they'd be willing to mount for you, to give you a better idea? Might cost a few bucks to have them do that (probably no need to balance if it's a test fit only), but may be worth it to answer for sure...
If you do that, perhaps jack up one side a little and do some turns and such to simulate the car turning under compression, so to speak...
If it can be done, sure would be cool! One of my only complaints on this car is the lack of tire, but still better than (not much though) the little skinnies my GTO came with (235/40-18), where it almost made it dangerous, lol.
04-24-2011, 05:22 PM
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it can be done. you just have to use a spacer to get the clearance. D3s V1 competition package use 335/30 in the rear and 295/30 in front. Link
Good Luck
Good Luck
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04-24-2011, 09:05 PM
#8
That car has fender flares. It looks like the wheels extend well past the OE fender openings. I've had hard enough rubs (right front and rear) on my '05 to unroll 3-4 inches of the opening lip front/rear( stock height with 275 rear, stock 245's on front). So, unless you drive absolutely straight with no curves, I don't see your running much more than 245's up front and somewhat wider than 275's with upgraded trailering arms and widened/custom wheels in the rear.
04-27-2011, 11:02 PM
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06-23-2011, 07:37 AM
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no rubbing and went to many track events
I tried this size only I confirmed with Luke and Lindsey Cadillac service mgr
--Jerry
06-23-2011, 07:44 AM
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06-23-2011, 09:15 AM
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275/35-18s are recommended to be mounted on 9-11" wheels. A 275/30 (if such a thing existed), with an even shorter sidewall, would probably be recommended for 9.5" or wider.
I wouldn't put 275 Hoosiers on an 8.5" wheel.
06-23-2011, 09:27 AM
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I say give it a shot!
06-23-2011, 10:14 AM
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I also ran 275/35/18 tires in front this weekend, lowered slightly in the front, and did not have rubbing issues of any kind. I also have very stiff springs that keep the car from leaning or squatting in turns.
06-23-2011, 11:06 AM
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Are you having Hoosier custom make you some 275/30s? Their website doesn't show that they make the R6 in that size.
275/35-18s are recommended to be mounted on 9-11" wheels. A 275/30 (if such a thing existed), with an even shorter sidewall, would probably be recommended for 9.5" or wider.
I wouldn't put 275 Hoosiers on an 8.5" wheel.
275/35-18s are recommended to be mounted on 9-11" wheels. A 275/30 (if such a thing existed), with an even shorter sidewall, would probably be recommended for 9.5" or wider.
I wouldn't put 275 Hoosiers on an 8.5" wheel.
I'll need to go see the tires in person...maybe not R6's...
--Jerry
06-23-2011, 09:40 PM
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