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Old 05-02-2009, 12:48 AM
sgbuick sgbuick is offline
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Wider tires in back
On 96 Caprice, I currently have 215/75 R15 tires which are apparently very hard to find. I have 2 nearly new 235/70 R15 tires sitting in my garage from a previous Buick Roadmaster, can I put them on the back? If I do, will it cause any issues?
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Old 05-02-2009, 01:06 AM
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Re: Wider tires in back
Quote:
Originally Posted by sgbuick View Post
On 96 Caprice, I currently have 215/75 R15 tires which are apparently very hard to find. I have 2 nearly new 235/70 R15 tires sitting in my garage from a previous Buick Roadmaster, can I put them on the back? If I do, will it cause any issues?
It might mess your speedo calibration a little but it should otherwise work.
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Old 05-02-2009, 10:13 AM
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Re: Wider tires in back
215/75-15 should have a circumference of 87.012" whereas a 235/70-15 should be 87.816". That will decrease the speed indication by a factor of 0.99079, or less than 0.09 percent.
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Old 05-02-2009, 04:11 PM
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Re: Wider tires in back
So, other than the speedo being off a little, everything else regarding ride/handling should be OK?
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Old 05-02-2009, 07:23 PM
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Re: Wider tires in back
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Originally Posted by sgbuick View Post
So, other than the speedo being off a little, everything else regarding ride/handling should be OK?
You might notice a slight increase in understeer during hard high speed cornering (if you do that sort of thing.) But for regular driving, you should be fine.
Just take a peek in the rear wheel wells and make sure the wider tires will not rub when the suspension is compressed. I seem to recall Caprice cop cars used 225's or 235's and were just fine.
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Old 05-02-2009, 11:58 PM
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Re: Wider tires in back
Yeah, the tires I am talking about came from a 96 Roadmaster, which has enclosed wheel wells (fender skirts), so I am guessing that they would not rub on a Caprice with open wheel wells?
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Old 05-03-2009, 10:00 AM
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Re: Wider tires in back
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Originally Posted by sgbuick View Post
Yeah, the tires I am talking about came from a 96 Roadmaster, which has enclosed wheel wells (fender skirts), so I am guessing that they would not rub on a Caprice with open wheel wells?
I did think of that, too. IMO put them on and just take a quick look. If you do not see any obvious interference, imo you are good to go.
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Old 05-06-2009, 01:26 PM
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Re: Wider tires in back
Quote:
Originally Posted by sgbuick View Post
Yeah, the tires I am talking about came from a 96 Roadmaster, which has enclosed wheel wells (fender skirts), so I am guessing that they would not rub on a Caprice with open wheel wells?
since these other tires are greater in circumference be cautious when driving in speed restricted areas as your speedo will read lower speed than you are actually going...

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