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Discussion Starter #1
Just wondering if anyone is running 275/40-18's at all four corners. I know it is not generally accepted that a tire this wide will fit on the front but I have seen 275's run on 17 wheels before so it can be done. If you have 275's, I am looking for what brand tires you are running, wheel offset, how much clearance, and any rubbing issues you have.

Thanks,
-Miller
 

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ON A MARK VIII

with brad's (cudaz101) Saleen speed stars 275/40/18's fit all four with no rubbing problems on a SLAMMED car. (tires inside wheel wells)

whatever offset that is, would probably work for a thunderbird too!
 

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Discussion Starter #4
I am going to venture and say he is running a BFG KDW with 36mm offset if his car is the one that Brad posted pics of in the thread about the Speedstars.

-Miller
 

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miller1995 said:
I am going to venture and say he is running a BFG KDW with 36mm offset if his car is the one that Brad posted pics of in the thread about the Speedstars.

-Miller

Yep...That is Chris' car "Black Mark" but he is not running 275's all the way around although there are several guys that are which is why he posted what he did.

I believe that Chris' car "Black Mark" is running a 255-40-18 front & 275-40-18 Rear.

BTW...Alot of the MarkVIII guys claim they can run a 275 all the way around with no rub. Don't sound right to me but then again I don't have a Mark of my own either...heh


Brad
 

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Discussion Starter #6
I am debating between 255-45-18 or 275-40-18 as there is not much of a price difference and the 275's are a bit closer to stock height. The 255-40-18's are an inch short and the same height as the 17's I have which seem to look a bit small to me.

-Miller
 

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Debating what exactly then?? To run either size all the way around or 275 rears and either 275-40-18 or 255-45-18 in the fronts???

I would have to say 245-45-18 fronts with the 275-40-18 rears...Same exact height tires. 255-45-18 being 27" tall COULD pose rub issues in the front because of HEIGHT not width.


Brad
 

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Discussion Starter #8
Why would height pose an issue as the stock 215-70-15 tires are 26.9"? The 255-45-18's are at 27" and the 275-40-18 are at 26.7". I want to run the same size all around.

-Miller
 

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miller1995 said:
Why would height pose an issue as the stock 215-70-15 tires are 26.9"? The 255-45-18's are at 27" and the 275-40-18 are at 26.7". I want to run the same size all around.

-Miller
As apposed to a 245-45-18 & a 255-45-18...The stocker 215MM tire is not even a demoniator at this point is it??heh

So to explain Further what I was making an attempt to say...The differance here compared to the 245-45-18 and the 255-45-18 is NOT the width it is the height. Where I have seen this size tire rub an equal height 245MM tire would rub as well. Does that spell it out a bit clearer??

You can obviously throw the dice any way you choose. I know without a doubt that a 245-45-18 will fit perfectly in the front and pose no issues regardless of a lowered or stock height Tbird. Anything taller and wider than that is going to be a roll of the dice. I am sure you would not have to look to hard to find someone to argue that though.;)


Brad
 

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Discussion Starter #10
Still not quite sure what you are saying, since I know people such as SirWil are running 255-50-17's which are also a 27" tire and should have similar width. My car is not slammed, the Tokico springs I have are pretty still and only have at most a .75" drop on the front end. The wheels I am looking at are a 18x9 with a 36mm offset but I would not be opposed to a 3mm spacer if needed. The '03 Cobras with a 26mm offset just stick out a bit too far in the front with 255's for me and rub on the wheel lip in the rear with 275's.

-Miller
 

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My BFG's are 11.5" wide to the nut in overall width (not section width) .... I forgot to post brand since i'm running the widest 275 available. If you go with another brand you could probably use a 285. I ran across 285's that wer closer to 11.25" wide, so in a falken you could probably run a 295 cause their rating scale is totally bunk. But I wouldn't buy falkens I've seen too many brand new sidewalls split all the way around. Junk.

I swapped my front and rears and went for a ride since I bought the fronts off ebay knowing I had to change out bushings soon I didn't want to wear out high retail tires. I checked this to debate on what I wanted to go with next, since my tires did wear by time I changed out my bushings and got a new alignment. They didn't rub at all.. so I think I'll go with a 255 40 or 265 40 in the front depending on price and I want to keep the 275 40 rear. I like a bit of a staggered look so my car doesn't look like a soap box car. :D

I have been running a 245 40 on front so far.

Those thunderbirds look good wether staggered or not IMO. With the more rounded mark viii body I think they look better staggered.

edit: I think I'm running a "40" on the front 245's and the rear 275's. So I corrected my post.
 

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miller1995 said:
Still not quite sure what you are saying, since I know people such as SirWil are running 255-50-17's which are also a 27" tire and should have similar width. My car is not slammed, the Tokico springs I have are pretty still and only have at most a .75" drop on the front end. The wheels I am looking at are a 18x9 with a 36mm offset but I would not be opposed to a 3mm spacer if needed. The '03 Cobras with a 26mm offset just stick out a bit too far in the front with 255's for me and rub on the wheel lip in the rear with 275's.

-Miller

Like I said....Its easy enough to find an argument...heh Really, you can make anything work if you don't mind the hassle.

Whatever ya choose to do I hope it works out.
 

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i run a 275 40-18 goodyear eagle f1's all the way around with those adr kasia from cudaz with no issues, and it;s lowered
 

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With 25svo having said that Miller, without any other miscommunications or misunderstandings, just find out what offset those kasai's sp? are and their width and figure from there.

I am sure that you can run a 275/40/18 all the way around with the wheels you want. (which I assume you'd get from Brad here since nobody else I know offers that offset in a 9" wheel which is what you'll want for a 255 or wider tire)

That is what I am running. +36 9" wide 18" wheel, running a 275 40 18, keeping my speedometer in check and I have no rubbing issues. Again this is a mark not a bird but with svo saying he's running the 275's I don't think you'll have a problem.

sigh. Taking a long time to get to the point THAT, if you're paranoid go with a 255 45 18 all the way around.

I think you and Brad have some confusion between you, I couldn't figure it out but I didn't try very hard. Maybe Brad is reading quick and not catching that you're comparing 17" tire sizes. The tire dimension you're giving WOULD be too tall if you were speaking of an 18" wheel. He is good with math I know that because all his wheels fit as good as possible in the extreme widths he chooses to have made for our cars. I see others try this who I won't mention but they always seem to have the wheels stick too far in or out and they're not even as wide as Brads. Actually I will mention that they're LMS wheels because I paid almost 2 g's for a set that fit like dog **** even though they were 2 inches narrower than I was told until I bought the saleens I hated my car thanks to the dumb****.

Hopefully your questions are answered. T birds look awesome with 18's. I would balls it out and go with 275 40 18's all around assuming you're getting wheels from cudaz101, if you're not I would steer clear of running a tire quite that wide. Maybe a 245.
 

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The only potential drawback I could see to running 275/40/18 all around, is that you might have an increased tendency for the car to wander and pull around in the "truck ruts" on the busier roads. I know my SC, with 255/45/18, gets pulled a bit, and I have the positive caster maxed out.

Any comments with regard to this from the people who have 275s all around? I'd still like to see some pics of a Bird with 275 tires on +36 9" wheels, to get an idea of how they actually fit in the fenders. When I had the 275 Hoosier race tires on my car, on +30 9" wheels, they hung out of the front fenders quite a bit. But the those particular tires are largest than most street tires in the same size designation. My car needs new street rubber for the upcoming season, and have thought about 275/40/18 all around myself.

So let's see some pics please !! ;) :D


cheers
Ed N.
 

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fast Ed N said:
The only potential drawback I could see to running 275/40/18 all around, is that you might have an increased tendency for the car to wander and pull around in the "truck ruts" on the busier roads. I know my SC, with 255/45/18, gets pulled a bit, and I have the positive caster maxed out.

Any comments with regard to this from the people who have 275s all around? I'd still like to see some pics of a Bird with 275 tires on +36 9" wheels, to get an idea of how they actually fit in the fenders. When I had the 275 Hoosier race tires on my car, on +30 9" wheels, they hung out of the front fenders quite a bit. But the those particular tires are largest than most street tires in the same size designation. My car needs new street rubber for the upcoming season, and have thought about 275/40/18 all around myself.

So let's see some pics please !! ;) :D


cheers
Ed N.
that's a good point! It depends where you live on having those 'truck ruts', but if I still lived in Iowa that would be a concern on select highways that weren't fortunate enough to be made out of cement.

Since I'm running staggered, I don't know. I know my car doesn't do it. I've been between Houston and minneapolis three times plus prob another seperate 15k miles on these tires. But the fronts are 245's. Oh god I have to look I don't even know what I have they might be 255's. they're 10.25" wide I remember that. Might depend on the tire also. Some treads like to climb the ruts, when wider of course it will get multiplied.

Pics would be nice.
 

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Miller, go 255-45-18, 27" diameter, thats what I run and there is a slight rub on full turns on the plastic inner liner. I rolled the rear lip just for the hell of it, but didnt need to. You can get the kumho asx in that size. Pretty good in the snow as well... I was just going around in it last night with the bird. I believe it's like $125 a tire at tirerack.

-Joel
 

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Just went from 255/45 18"s to 245/45 18"s on my tbird. The wheels are 18x8.5 with 35mm offset. The car is really low(jamex springs no fender gap in the front). And with the 255s it does rub the inner liners, it wore through the front left, and has marks on the front right. On occasion they would rub the fender lip when going in and out of steep driveways with the wheels turned. I don't see how you can run a 275 in the front without it either sticking out of the fender or rubbing the spindle nut. And yeah the car does pull you into the ruts and train tracks with the 255's.

I live and work in San Francisco and with all the hills and steep driveways the suspension really sees the extreme.
 

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25svo said:
i run a 275 40-18 goodyear eagle f1's all the way around with those adr kasia from cudaz with no issues, and it;s lowered
I also have the kasai with 245's all around and I thought they were an 8" wheel. A 275 will safely run out back???
 
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