Need Help Picking Tire Sizes.

Diplomat_Wagon

Hiding In The Bushes While
Looking at getting new rubber for the New Yorker to replace those damn truck tires.

I can get an awesome price on Dean Stinger GT's through work but I can't decide on size.
StingerRadialGTS.jpg


The car came with 225/75/15's and there are 235/75/15's on the car now and they work great, no rubbing anywhere.

Now I'm looking at 255/70/15's on the rear and 235/70/15's on the front.

225/75/15 is 8.85" wide and 28.28" tall.
235/75/15 is 9.25" wide and 28.87" tall.

235/70/15 is 9.25" wide and 27.95" tall.
255/70/15 is 10.03" wide and 29.05" tall.


Or same size in a 60 series.

225/75/15 is 8.85" wide and 28.28" tall.
235/75/15 is 9.25" wide and 28.87" tall.

235/60/15 is 9.25" wide and 26.10" tall.
255/60/15 is 10.03" wide and 27.04 tall.



Since I will be going with the 408/518 combo with a 3.91 rear end I'm leaning toward the taller tire since it does fill the wheel well out better and is not much taller then the 225/75/15's the car had originally.

Opinions? :huh:
 

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imo you need a tall...truckish size tire just to fill those land yacht wheelwells....im willing to bet that the 60's will look to small
 
Use tirerack to find the right size..they have spec's on all sizes of tires, all you have to do is get how tall your tire is and then chase sizes till you find one that suits your taste and budget.

Looks damn good by the way.
 
PLEASE NOTE: What follows is my opinion, not law or orders or bashing. If you don't agree with me, well, I see no reason why you should. Disclaimer in place, I shall sally forth:

I think the wheelwells look way overstuffed--it looks as if the tires were borrowed from a truck to get it on the road. There's way too much sidewall-to-wheel, in my opinion. Also, on the tall tires, the white lettering is inset towards the wheel, which I don't find appealing either. To my eye, there needs to be some open wheelwell around the tire, and sidewall-to-wheel is more important than how full the wheelwells look. I bought my Mirada with 235/70R-15s, and I thought that was too much sidewall. Of course, a Mirada is a sportier body style as is a Charger, obviously. I also thought the tires too narrow in the back. I think mismatched tire sizes front-to-rear look out of place on a sedan as well as many other cars (GM F-bodies, for example). Some cars just aren't suited to bigs 'n' littles.

Your wheel openings are no larger than those of a '71-'74 Charger. In fact, I'd be surprised to find out yours aren't smaller. The car's just a renamed B-body, after all.

What size are your wheels? Anything wider than a 255-series tire is going to look pinched on a 7" rim. The sidewall will form a funnel into the wheel. That really looks goofy. A 255-series is right on the borderline in that department.

Were it my car--and it's not--the first thing I'd do would be lower the rear about an inch. The jacked-up look has never, nor ever will work on a sedan. Losing the height in the rear would still leave a little rake, subtle but noticeably mean. If they'd clear (and it's likely they won't up front) I'd go 255/60R-15 all the way around. That's the max I'd go in the rear unless you could get 15x8 wheels out back; then a 275/60R-15 might work (again, clearance) without looking pinched. A 255 likely won't clear up front in parking-lot manuevers (rubbing the frame); I'd check to see if a 245/60R-15 would and if not, I'd go 235--that's exactly what I had up front on my Charger when I had all four alloy wheels, paired with the P255/60R-15s out back.

Under no circumstances would I ever have the white letters showing on a sedan. Ever. It's poseur territory and does not make the car look attractive, sporty, muscular, etc. It screams, "I'm trying to make this car something it's not" and in your case, totally detracts from the sleeper image. I also wouldn't run anything louder than stock exhaust on this car... but that's another discussion. Also, I'd lose the cheap-looking $29-each chrome rims and replace them with either factory Mirada 10-spoke or LeBaron/Cordoba 5-on-5 spoke alloys. They'd look smokin' hot, but barring that I'd probably go with body-colored 15x7 '80s 5th-Avenue steelies with plain dog-dish hubcaps and matching brushed trim rings.

That is the end of my "opinions" phase. Feel free to rant about it, but like I said it's just what I'd do. It is in no way meant to insult. Far from it--I dig this project, particularly the future drivetrain upgrades. As a final note, though: my sidewall-to-tire argument works both ways... I absolutely hate anything larger than an 18" wheel, and to run one it'd better have some sidewall proportion to it. None of ths rubber-band shit!

Remember how tire sizes work: a P255/60R-15 means:
  • P means it's a passenger-car tire. Light-truck tires sometimes start with LT instead of P.
  • The tire is 255MM--10.039" wide at its widest point (the sidewall). It does not have anything to do with tread width. Tread width is totally dependent on...
  • Aspect ratio. The 60 means the sidewall is 60% of the tread width. In the case of our example, that means it's 153MM, or 6.02". Multiply this times two, and add to rim size to get overall tire height.
  • R makes it a radial tire.
  • 15 is the size of wheel on which it fits.
Things to keep in mind: The taller the tire, the further out from the wheel center your widest point is going to be. So, on a P255/60R-15, your widest point will be approximately 10.51" from your axle centerline. On a P275/70R-15, the widest point is going to be a whopping 11.29" from your axle centerline (.78" greater), as well as being .79" wider, or .395" closer to your frame on one side and your quarter lip on the other. These might seem like trivial numbers, but they're actually enormous when it comes to tire clearance. The most likely scenario is Rub City, with cut sidewalls a huge problem on the outside edge.

Feel free to blast me, but at least consider the time and thought I put into this reply on Dippy's behalf, OK? :D
 
Wow Jass I had no idea you cared so much! :D

Well I don't know why but I've always liked the look of raised white letters but I guess It's more of a truck thing then a car, I do see your point with that.

As for the wheels, I had them, couldn't afford the Torque Thrust D's I wanted so I used them since they are also 8" where are these Cordoba wheels I have are only 7" I think.
Cordoba7.jpg


The exhaust was not planned to be as loud as it is but there again once is was done I couldn't afford to redo it.

That picture is also a little deceiving, the parking lot is on an incline so the car looks higher in the rear then it actually is, it is almost level. :)

Under hard cornering the 235's rub the top of the fender well.



I had been tossing around the idea of those Cordoba wheels but could never figure out tires for them.
DSC00257-1.jpg


Here's the idea I was tossing around for them, all shined up with body color painted background spokes.

DSC00257an2.jpg




If it was yours Jass what size would you run?

245/60/15 front and 255/60/15 rear?

Aren't those too big for 7" wheels?

Any preference to tire brand? :huh:

I only wanna do this once Goddammit! :D
 
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I like the body-colored inserts idea a lot. Those would be the wheels I'd use (in fact, I am on the LeBaron), done with the body color.

The 255/60R-15 works on a 15x7--it's what I had on the back of my Charger. It's wide enough that it's just about pinched-looking, but I put thousands of trouble-free miles on it. The 245s might not clear in the front under tight turns (parking and such) but would probably be OK around town. It cleared with no issues whatsoever. I had 235/60R-15s in the front. Sadly, I don't have any pics of it with all four alloys in place on those tires, but the photo shows what a 255 looks like on a factory alloy.

Use a wire coat hanger and make a tire gauge. Bend it up so it can be secured under a couple of lug nuts, then bend it to the approximate cross-sectional shape of your desired tire size, taking care to get the height and width right. Bolt it up, then turn the rotor and see if it hits anything. Do it with the wheels turned, with the car supported by the control arm, etc. so you simulate all conditions. This way, you don't have to buy tires and be surprised.

Brand? That's totally up to you. Something with good traction and temperature ratings would be a must (it's written on the sidewall--A is best on both). In my case, I'll be running Generals on the Imperial because they're the only ones that make a tire in the size I want. I'm still up in the air where the LeBaron is concerned.
 

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I can get General tires at work here. What make of tire?

The 245's should fit, they aren't much wider then the 235's and the reason the 235's rub is they are a lil too tall.
 
So I snagged those wheels from their home under that '80 'Doba and I'm gonna strip the paint and clear coat off of them.


Thinking I should pick up another kit like the old one I had. Worked great!

eBay Linky



Should I re-clear them when I'm done polishing and painting?
 
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I guess there is no clear coat on these wheels.

Makes my life easier thats for sure. :D

I wonder if I should clear them or leave them bare?
 
As long as you care for them regularly and don't drive 'em in salt, you should be OK. Personally, I'd clearcoat them using something like Dupli-Color Engine Enamel clear. It's formulated for high temps (brake heat) and has a high gloss. Brake dust can start to corrode raw aluminum pretty quickly.
 
Well I bent up a gauge out of a coat hanger like you said Jass and a 245 is a tad too big for the front, it would rub against the rear of the K-frame.

235 and 255 it is.

Thanks for you help! :)
 

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