Need help with tire sizes.

[JwMonE99]

I just bought ZR1 rims 17x9 (4)
I am looking at putting 275/45/17s on the rear and 255/45/17 front.
Are those sizes going to be ok or will they off balance my car? Someone told me I need to have 275s all the way around but I just needed ur inputs first. Thanks

[kickflippin1]

Go with the 274/45/17 all the way around. It will keep your overall diameters the same. The 255 should be fine on a 9" rim, but the 275 is wider, so I would stick with that. I'm not saying you cant put the 255 on, I just wouldn't recommend it (also, just personal preference if it were my car). I've been working with tires for almost 4 years now, so just an "experienced opinion".

[Y2KPewterSS]

I think you mean 275/40/17 for the rears, not 45s.

You don't have to have 275s all around. The thing to be concerned with is the overall diameter.

For instance, one brand of a 275/40/17 might have an overall diameter of 25.7"

You would want the front tires to have an overall diameter very close to that. If the diameter between the front and back tires differs quite a bit, it can throw your ABS off. If its off more than .5" its not a good match.

I checked the same brand of tire for the 255/45/17 and it had an overall diameter of 26.1" so you should be ok with that combo. I don't know that I would want a 255 on a 9" wheel though

You can find the overall diameter of a specific tire at tirerack in the specs. Hope this helps.

[kickflippin1]

I think you mean 275/40/17 for the rears, not 45s.

You don't have to have 275s all around. The thing to be concerned with is the overall diameter.

You're right about the size. I should have caught that. Also agreed with everything else said.

[Hi-Po]

Why 255's up front on a 9" rim??

I would stay 275 all the way around.

[Another WS6 Guy]

Personally, i'd go with 315/35/17s in the rear and 275/40/17s up front. Great traction, and the look mean as hell. My buddy's 02 ws6 has them. Here's pics.







And they smoke up quite nice too






and yes, in the first pic the car doesn't have stripes. That pic was taken before the stripes were put on.

[Hi-Po]

315 dont really like to go on a 9 " rim do they???

You have to be pushing it. It does look sick though.

[JwMonE99]

so 275 rear and 255 is a no no for the 17x9

[JwMonE99]

Well nvm let my change that,
why not 255s on the front on a 9 inch rim?
Just curious, I also do some autocross from time to time.

[Hi-Po]

so 275 rear and 255 is a no no for the 17x9

No, re-read Y2k's post. He did some researching for you on exact dimensions for the tires your looking at... he said you would be fine.

But why but 255's up front though I my question?

I would opt for 275's all the way around if it was me.

[JwMonE99]

Mostly just money issues. Also I will do some autocrossing so I dont want the front tires to be too wide. I just wanted to make sure they will be ok.
So if overall the diameters are within .5inch it should be fine?

[Y2KPewterSS]

Mostly just money issues. Also I will do some autocrossing so I dont want the front tires to be too wide. I just wanted to make sure they will be ok.
So if overall the diameters are within .5inch it should be fine?

You should be ok with your 255 275 combo. The 255 will fit on a 9" wheel, but it may look odd or too thin.

You would be better off with 275s all around plus you could rotate your tires with all 4 being 275s. The price of 255s versus 275s isn't that much different is it?

[JwMonE99]

^about 60 bucks each in difference from 255 and 275 unless we have a sponsor with tires?, I been searching a lot for the past 2 days the best deals to what I want and to how much I have to play with.

[Y2KPewterSS]

^about 60 bucks each in difference from 255 and 275 unless we have a sponsor with tires?, I been searching a lot for the past 2 days the best deals to what I want and to how much I have to play with.

What brand of tires are you looking to get and what is your ideal budget to spend on the 4 tires?

[JwMonE99]

Kuhmo and around 100 bucks a tire.

[JwMonE99]

That was a typo with the pricing of tires.
I can get 275 for $130 shipped each.
255s for $115 so there is a 30 dollar difference, I might just do that then but still im looking at over 500 for tires plus to put them on and balance them? I paid more for just the rims.

[Hi-Po]

Kuhmo and around 100 bucks a tire.

So then Mickey Thompson ET streets are out of the question for the rear?



I got raped on 2 tires...

But I can finally HOOK!!!

[Hi-Po]

That was a typo with the pricing of tires.
I can get 275 for $130 shipped each.
255s for $115 so there is a 30 dollar difference, I might just do that then but still im looking at over 500 for tires plus to put them on and balance them? I paid more for just the rims.

Tires arnt something you want to skimp on dude. Cough up 30 bucks and get 275 all around...

Hell I just spent almost 500 on to rear tires.

[JwMonE99]

I rather have my car spin, safer for the rear lol.
Plus I am not pushing much more then 300RWHP for now.

[JwMonE99]

Yea I am looking at the Kumho ECSTA SPT tires.