20" rims tire size
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, 20" rims tire size in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; What size tires are most running on 20" rims? I just put some 20's on today running 255/35/20 8" width....
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    arogers260's Avatar
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    20" rims tire size

    What size tires are most running on 20" rims? I just put some 20's on today running 255/35/20 8" width.

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    MoistCabbage's Avatar
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    You need to keep the OD of the new tire within ~1/4" of that of the stick size tire. Go to www.tirerack.com , look up your stock tire size, and click in specs to see the OD. Then look through some 20's, and see what's closest.

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    Re: 20" rims tire size

    Quote Originally Posted by MoistCabbage View Post
    You need to keep the OD of the new tire within ~1/4" of that of the stick size tire. Go to www.tirerack.com , look up your stock tire size, and click in specs to see the OD. Then look through some 20's, and see what's closest.
    I'm just curious what others are running. I have no issues with these tires.

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    Well I would assume others are running the correct size tires, which is found by doing what I suggested.

    ...Going to the website is faster than waiting for someone to chime in.

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    Re: 20" rims tire size

    You act as if I'm new to this forum and don't know how to google myself. What is the correct tire size since you seem to know it all?

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    Re: 20" rims tire size

    Quote Originally Posted by arogers260 View Post
    You act as if I'm new to this forum and don't know how to google myself. What is the correct tire size since you seem to know it all?
    I'm not sure why you're getting pissy with MoistCabbage when he's offering you good advice.

    Quote Originally Posted by arogers260 View Post
    I have no issues with these tires.
    You should, since they're the wrong diameter (too tall by almost 1-1/4") and they're too wide for the wheels you ordered.
    '05 Stealth Grey CTS-V, Hyper Silver Linea Corse Venetos w/Continental ExtremeContact DWs (summer), black Team Dynamics ProRace 1.2 wheels with 275/35-18 R-compounds (track), Hyperblack Rota Torques (winter), KW Variant3s, V2 front brakes, Hotchkis rear sway bar, EPS cam, TEA-ported 243 heads, FAST92 intake w/LS2 TB, JBA Camaro/G8 1-3/4" shorty headers w/JBA cat pipes, Corsa exhaust, UUC motor and tranny mounts, UUC shifter, MAPerformance trailing arms, Specter cradle bushings, etc...

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    Re: 20" rims tire size

    Wrong size or not they are on the car now and fit without any rubbing. I really was just asking what sizes others are using as a reference and too see how they ride. My car actually rides smoother on the tires and rims I put on than my stock 17's. I wasn't trying to start up an arguement I must've took what moistcabbage said the wrong way and I apologize for coming off like an ass.

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    Re: 20" rims tire size

    i run 245/35/20, no issues other than they arent cheap to replace.

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    drknt03 is offline Cadillac Owners Member
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    Re: 20" rims tire size

    225/35/20 90W Nitto Neo Gen

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    I run P225 35 20 on my 8" wide rims. Any wider then that on a 8" rim and you are asking for trouble. The P 255 that you have should be on a 10" wide rim. The side walls are not doing what they are designed to do and non- normal ware and even blow outs can happen.

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    Re: 20" rims tire size

    They may be 8.5" wide I bought them used and they came off an 07 impala ss. I was aware of the tire size possibly being an issue but before I bought them I called a local tire shop and did a cross reference to make sure I had an optimal fit. They did say the impala tuns a bit bigger tire but if I was to have clearance issues it would be on the upper control arm.

    ----------

    They need new tires on 2 of the wheels so ill pry run the 245/35/20 on the fronts and keep the 255/35/20 on the rear.

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    My post wasn't intended to be a smart ass remark. I figured if you were just sitting around waiting for an answer, you could hop on tirerack and have your answer quicker.

    I wouldn't mismatch sizes if the OD isn't VERY close. It could cause wheel speed sensor, ABS, and TCS codes/messages/lights.

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    Re: 20" rims tire size

    Quote Originally Posted by pearl03 View Post
    I run P225 35 20 on my 8" wide rims. Any wider then that on a 8" rim and you are asking for trouble. The P 255 that you have should be on a 10" wide rim. The side walls are not doing what they are designed to do and non- normal ware and even blow outs can happen.
    Both a 245/30-20 and a 245/35-20 can fit an 8" to 9.5" wheel (per the tire manufacturers' standards), so I think you're being overly conservative to say anything wider than a 225 is asking for trouble. Assuming the tire is kept properly inflated there's no reason to think running a 245 would be a problem. Even the 255/35-20 would be OK if the wheels are actually 8.5" instead of 8".

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    Re: 20" rims tire size

    At the tires widest point its 9 1/2" wide the way it sit so I'm pretty sure they are 8 1/2" rims. Ill have them measured when I go for a balance and the 2 new tires.

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    J W
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    Re: 20" rims tire size

    I would keep them all the same size so they can be rotated

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