Author Topic: Non matching tires, is it a big deal to you?  (Read 415 times)

SP Steve

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Non matching tires, is it a big deal to you?
« on: November 21, 2017, 02:35:37 PM »
I'm thinking about putting a set of staggered 17x9 & 17x8 Year One Rallye II wheels on my 71 Formula.  I want to put a set of 255/50-17 tires on the back and a set of 245/50-17 tires on the front.  Problem is I can't find a set of matching tires.  What's more important to you, tire size or compromising size to have matching brands and tread pattern?

Aus78Formula

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Re: Non matching tires, is it a big deal to you?
« Reply #1 on: November 21, 2017, 04:46:31 PM »
doesn't matter at all if they are the size you want/need. It only depends how noticeable the tread pattern differs on wide rubber hanging outside the car, or worse, if they have white raised lettering with different wording. If it doesn't bother you then go for it.

71455formula

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Re: Non matching tires, is it a big deal to you?
« Reply #2 on: November 21, 2017, 05:58:21 PM »
It wouldn't be problem mixing sizes like that. Plenty of people do that. When it comes to brand and tire tread; it's a matter of staying with the same type tire. What i mean is not mixing a summer tire with an all season tire. If there are 2 bfgoodrich sport comp 2 tires and let's say 2 firestone wide oval 2 tires that meet the sizes you need then it should be a problem they have 2 different tread patterns, but they are the same type of performance tire. Tread wear, temp and traction maybe a little different, but try are the same type of performance tire. Hope this helps.
1971 LS5 Formula ( Finally getting somewhere.)
2013 GMC Sierra 5.3l 6 speed Diamond White(Pearl White) SLP 1.9L blower in June

FULZGOLD

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Re: Non matching tires, is it a big deal to you?
« Reply #3 on: November 21, 2017, 06:39:51 PM »
Many people do different sizes front and rear, just not me. I have no reason why.
1978 Y88 Trans Am
4-Speed
47k Mile Survivor

NOT A TA

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Re: Non matching tires, is it a big deal to you?
« Reply #4 on: November 21, 2017, 07:05:30 PM »
Many people do different sizes front and rear, just not me. I have no reason why.

Some of us do it for particular performance applications. As an extreme example when going to the drag strip I'd put wide MT ET Streets on the back with really no tread for traction and MT ET fronts on 3" rims up front for light weight and low rolling resistance. The combo was worth .4 in the 1/4 compared with my regular street wheels/tires on a 14 second car.

John Paige
Lab-14.com

Re: Non matching tires, is it a big deal to you?
« Reply #4 on: November 21, 2017, 07:05:30 PM »

SP Steve

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Re: Non matching tires, is it a big deal to you?
« Reply #5 on: November 22, 2017, 03:30:24 AM »
Thanks guys.  I totally agree on not mixing tire types e.g. performance tire vs all season.  I'll look and see if I can find two tires with similar tread patterns.  I have a set of Goodyear white letters I bought from Treadwear. I could use those to help hide the tire mixing.

DeVilliers

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Re: Non matching tires, is it a big deal to you?
« Reply #6 on: November 22, 2017, 03:34:33 AM »
Tire size difference front to back is fine. But different lettering and pattern would irritate the crap out of me, but it's just me  :D
1979 Trans Am

LeighP

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Re: Non matching tires, is it a big deal to you?
« Reply #7 on: November 22, 2017, 03:38:36 AM »
Just wondering why you want to stagger the wheels...the YO 17x9's will fit on the front with no issues.

17x9 all around with 255/50x17 all around.....nothing touched.

71FB with 17s by Leigh Peddell, on Flickr
Regards,
Leigh

Sydney, Australia
1969 Pontiac Firebird 400 coupe (project)

Former Firebirds -
1971 Pontiac Firebird 455
1977 Pontiac Trans Am
1976 Pontiac Trans Am
1967 Pontiac Firebird 400 convertible
1967 Pontiac Firebird 400 coupe


Box

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Re: Non matching tires, is it a big deal to you?
« Reply #8 on: November 22, 2017, 04:01:17 AM »
Staggered is ok, but not optimal in this instance.  Mixing tires brands or models is just not a good idea for road use, in the dry you'll probably never experience an issue but in the rain it could really throw things off as how the tires evacuate water will be different front to back.  Personally I'd do like LeighP and run a square setup; you'll have less under-steer, you can get matching tires around the car, and you'll be able to rotate your tires as well which really only matters if you drive the car enough to wear them out before they dry rot but it's nice to get all your money's worth from tires.  The only time you really want a staggered setup is on rear engine and mid engine cars where you want more under-steer built in, or like NOT A TA mentioned for drag racing.  Most manufacturers are doing it these days for the look, since "it looks cool" to have wider wheels in the rear like those rear and mid engine exotics.

1996 Pontiac Firebird Formula hardtop 6-speed

SP Steve

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Re: Non matching tires, is it a big deal to you?
« Reply #9 on: November 22, 2017, 09:22:40 AM »
I want to do the 17x9 and 17x8 stagger because the front tires are closer to the edge of the fender than the rears with a square 17x9 setup.  I have the same setup as Leigh on my 74 Trans Am and it's noticable.  If I ran a 17x8 up front the front tire would be tucked in 1/2" more and would make the distance to the edge of the fender about the same.  It would look better and I can get the car lower without the tires rubbing when cornering.

Front
TA_country_01" border="0

Rear
TA_country_02" border="0

Difference
TA_country_03" border="0

nas t eh

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Re: Non matching tires, is it a big deal to you?
« Reply #10 on: November 22, 2017, 10:31:59 AM »
Have you considered the Nitto NT450 in 255/50/17 and 275/50/17? I just wish they made both these sizes in the 555G2.
current
73 T/A 4speed
past birds
75 T/A 455 4speed
75 T/A 400 4speed

SP Steve

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Re: Non matching tires, is it a big deal to you?
« Reply #11 on: November 22, 2017, 12:37:03 PM »
Have you considered the Nitto NT450 in 255/50/17 and 275/50/17? I just wish they made both these sizes in the 555G2.

I looked at the 275, but it is really tall at 27.8".  You'd think someone would make a 255/50-17 and a 245/50-17 in the same design?

Box

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Re: Non matching tires, is it a big deal to you?
« Reply #12 on: November 22, 2017, 04:56:11 PM »
The factory tire height was 27.4", so it's only a little taller than stock.  If it comes down to it I'd do like nas t eh suggested way before I'd consider mixing brands and models of tires.

1996 Pontiac Firebird Formula hardtop 6-speed

nas t eh

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Re: Non matching tires, is it a big deal to you?
« Reply #13 on: November 22, 2017, 05:30:04 PM »
The rear wheel opening on a 2nd gen and the narrow rear track that you are trying to correct are both just begging for a taller tire.

I unfortunately bought 255/4517 and 285/40/17 555's, by the time i get finished lowering the car to look right my headers will barely clear the dividing line paint on the road when I change lanes. I fully expect that if I ever get everything else done on the car and I am down to just suspension stuff, that i'll be buying a new set of tires and throwing these ones out. I'll just be deciding on 255/50 all around or those 275/50l's out back.
current
73 T/A 4speed
past birds
75 T/A 455 4speed
75 T/A 400 4speed

70RAIV455

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Re: Non matching tires, is it a big deal to you?
« Reply #14 on: November 22, 2017, 10:58:51 PM »
The rear wheel opening on a 2nd gen and the narrow rear track that you are trying to correct are both just begging for a taller tire.

I unfortunately bought 255/4517 and 285/40/17 555's, by the time i get finished lowering the car to look right my headers will barely clear the dividing line paint on the road when I change lanes. I fully expect that if I ever get everything else done on the car and I am down to just suspension stuff, that i'll be buying a new set of tires and throwing these ones out. I'll just be deciding on 255/50 all around or those 275/50l's out back.

You need at least 3 inches of ground clearance with the Primary Header tubes and collectors on a 2 nd Gen.
5 inches be better.
Any less and sooner or later you will smack the header tubes or rip them off going up a steep driveway or parking lot.

Re: Non matching tires, is it a big deal to you?
« Reply #14 on: November 22, 2017, 10:58:51 PM »

70RAIV455

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Re: Non matching tires, is it a big deal to you?
« Reply #15 on: November 22, 2017, 11:06:39 PM »
Staggered is ok, but not optimal in this instance.  Mixing tires brands or models is just not a good idea for road use, in the dry you'll probably never experience an issue but in the rain it could really throw things off as how the tires evacuate water will be different front to back.  Personally I'd do like LeighP and run a square setup; you'll have less under-steer, you can get matching tires around the car, and you'll be able to rotate your tires as well which really only matters if you drive the car enough to wear them out before they dry rot but it's nice to get all your money's worth from tires.  The only time you really want a staggered setup is on rear engine and mid engine cars where you want more under-steer built in, or like NOT A TA mentioned for drag racing.  Most manufacturers are doing it these days for the look, since "it looks cool" to have wider wheels in the rear like those rear and mid engine exotics.
I think Porsche started the trend Box.

The 1990 Corvette ZR-1 was a widebody car.
The front & rear suspension is identical to standard C4 Vettes other than the spring rates and shocks.
All included and Kingpin inclination angles stayed the same.
Front rims were 17x9's. Rears 17x11's.
275/40R17 front tires
315/35R17 Rear tires
Car was made to run 200 mph.

Something to research yet because No High Speed 15s are made no more other than Drag Radial tires & Moroso DS2 skinnies up front.

118 mph speed rating not going to cut it for me.

LeighP

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Re: Non matching tires, is it a big deal to you?
« Reply #16 on: November 23, 2017, 12:47:10 AM »
I can see what you mean about the difference in the tyre in relation to the fender lip. I looked at another view of my 71 and can see it better in the pic (below)......I don't think my front tyre sticks out as much as yours, but perhaps thats the angle of the photos.

P3170219 by Leigh Peddell, on Flickr
Regards,
Leigh

Sydney, Australia
1969 Pontiac Firebird 400 coupe (project)

Former Firebirds -
1971 Pontiac Firebird 455
1977 Pontiac Trans Am
1976 Pontiac Trans Am
1967 Pontiac Firebird 400 convertible
1967 Pontiac Firebird 400 coupe


SP Steve

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Re: Non matching tires, is it a big deal to you?
« Reply #17 on: November 23, 2017, 02:23:19 AM »
I'm warming up to the idea of the Nitto NT450 275/50-17 and 255/50-17 sizes on the staggered 17x9 and 17x8 wheels.  The tires would fit the wheels almost identically, the 275 has a 11.06" section width (9" wheel) and the 255 has a 10.16" section width (8" wheel).

71455formula

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Re: Non matching tires, is it a big deal to you?
« Reply #18 on: November 24, 2017, 05:10:45 PM »
I'm running 17x9.5s with 275/40/17s on all 4 corners off my 71 and they fit great. Haven't had any rubbing.
1971 LS5 Formula ( Finally getting somewhere.)
2013 GMC Sierra 5.3l 6 speed Diamond White(Pearl White) SLP 1.9L blower in June

LeighP

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Re: Non matching tires, is it a big deal to you?
« Reply #19 on: November 26, 2017, 12:05:27 AM »
I ran NT450's on my 77.....maybe not as sticky as the Invo's on my 71, but I liked the NT450.
Regards,
Leigh

Sydney, Australia
1969 Pontiac Firebird 400 coupe (project)

Former Firebirds -
1971 Pontiac Firebird 455
1977 Pontiac Trans Am
1976 Pontiac Trans Am
1967 Pontiac Firebird 400 convertible
1967 Pontiac Firebird 400 coupe


80transam

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Re: Non matching tires, is it a big deal to you?
« Reply #20 on: December 06, 2017, 10:13:01 PM »
 "my headers will barely clear the dividing line paint on the road when I change lanes"... right!?!
i had my car built in ohio, where the only speed bumps you ever see are in a trailer park. then we moved to south carolina, where there a speed bumps EVERYWHERE. every apartment complex, parking lot, grocery store, even just a normal road in a neighborhood had them!
ditched the headers (the jet-hot coated headers...ouch to the wallet) and installed RAREs. problem solved.

Re: Non matching tires, is it a big deal to you?
« Reply #20 on: December 06, 2017, 10:13:01 PM »
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