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Discussion Starter #1
I've decided after a previous post I made to not go with 275s on the front of my car. However I'm going to be getting 9" wide rims for the front. I don't want the tire to appear "stretched" so I was thinking of going with the 255/40s instead of the 245/45s. The only problem I see with this is a 245/45/17 is 25.7" in diameter, and the 255/40 would be 25.0". I'm running 315/35/17s in the back which are also 25.7". Would running a smaller diameter tire in the front throw anything off? (Like ABS) Or would it look weird?
 

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for the abs to work all 4 tires need to be the same dia.
 

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Abyssinian of AX
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^ there is some flexabilty in the ABS system, but will be best to stay as close as possible :yes

It is said to be somewhere around 1" differential, but unable to get any more accurate info on the subject. They can give you some fits with different diameter tires, but I recommend you stay within 1/2" for a wider margin for error.

Jazzer :)
 

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Discussion Starter #4
So you think .7" would be too far off? To be exact it would be .65". 245/45/17 (25.68) 255/40/17 (25.03)
 

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So you think .7" would be too far off? To be exact it would be .65". 245/45/17 (25.68) 255/40/17 (25.03)
generally yes it's enough to cause problems
 

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Abyssinian of AX
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^ agreed with both of the above :yes

ABS is just a funny thing.... There are soo many variables in which you can have issues. I recommend one stay within 1/2" and BEST to stay the same diameter. I am sure up to 1/2" is not gonna be an issue, but this combined with low tire pressure can trigger the ABS sensors on ya.

Jazzer :)
 

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I have run 255/40/17 and am currently running 255/45/17 on the front of my car with no problems whatsoever with the abs. I am running a 275/40/17 m/t drag radial on the back. The only reason I changed from the 255/40 to the 255/45 was I thought the 255/40 looked to small in the fender well. I have an Eibach Pro Kit on the car. Other cars may respond differently with the ABS but mine had no issues with either tire. Its a 2000 GT 5-speed with 9.5" wide wheels all around.
 

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Discussion Starter #11
I have run 255/40/17 and am currently running 255/45/17 on the front of my car with no problems whatsoever with the abs. I am running a 275/40/17 m/t drag radial on the back. The only reason I changed from the 255/40 to the 255/45 was I thought the 255/40 looked to small in the fender well. I have an Eibach Pro Kit on the car. Other cars may respond differently with the ABS but mine had no issues with either tire. Its a 2000 GT 5-speed with 9.5" wide wheels all around.
i am running 255/40/17 up front and 315/35/17s out back with no abs issues
Are the pics in your garages with the 255/40s?
 

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I used to run 315's out back with both 275's and 255's up front when I still had ABS and never had a problem with it. I didn't get any problems until I put the 275/60/15's on the back with the 255's up front. So I deleted the ABS and then just swapped to 165/80's on the front.
 

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one thing you will need to consider is, will it look right with your stance. my car sits lower in the front than in the back so when you look at the car from the side the wheel to fender gaps look right. if your car doesnt have a raked stance you will have a bigger gap up front so itll look kinda funny. you are also putting the front of the car about a 1/4in lower to the ground, so if your car sits very lower itll make it lower. my car has been lowered quite a bit and with the 255/40s up front i could tell a big difference from my 275s i was running(easier to bottom out the k-member).
 
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