Is 275's too big for a 67? - Team Camaro Tech
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post #1 of 25 (permalink) Old Aug 17th, 07, 12:41 PM Thread Starter
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Is 275's too big for a 67?

I was on the phone about to order my tires and wheels. The sales guy warned me about a tire this big on a 1967. Is anyone having major issues with a tire this size on a 17X9.5 rim?


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post #2 of 25 (permalink) Old Aug 17th, 07, 12:48 PM
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Re: Is 275's too big for a 67?

No just order the correct back spacing and you should have no problem

67 SS clone,383 ,Built TH700r4,2500 stall converter,3.73 gears,eaton possi,1" lowering kit,1"sway bars ....more upgrades on the way
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post #3 of 25 (permalink) Old Aug 17th, 07, 01:16 PM Thread Starter
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Re: Is 275's too big for a 67?

Is 5.5" the backspacing I want?


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post #4 of 25 (permalink) Old Aug 17th, 07, 01:33 PM
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Re: Is 275's too big for a 67?

Yep

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post #5 of 25 (permalink) Old Aug 17th, 07, 03:47 PM
 
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Re: Is 275's too big for a 67?

I bet a 295 will fit if you are centered!!!!!!!!!!!!!!!!!!

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post #6 of 25 (permalink) Old Aug 17th, 07, 05:10 PM
 
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Re: Is 275's too big for a 67?

How about a 275 with a 9" wheel? Can I get away with 5.00 backspacing?
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post #7 of 25 (permalink) Old Aug 17th, 07, 05:10 PM
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Re: Is 275's too big for a 67?

You want to get really confused? Read this - lots of good info. http://www.pro-touring.com/forum/sho...&highlight=295 By the way I agree with what has previously been stated 275s on 9.5s with 5.5" backspace. That thread does have some great info in it though.

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post #8 of 25 (permalink) Old Aug 17th, 07, 05:14 PM
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Re: Is 275's too big for a 67?

Quote:
Originally Posted by fireeater View Post
How about a 275 with a 9" wheel? Can I get away with 5.00 backspacing?
Believe it or not the custom wheel companies suggest 5 and 3/8". If that's not available 5.25" or if the only option is 5 or 5.5 go with the 5.5. It's better to error on the inside than the outside.

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post #9 of 25 (permalink) Old Aug 17th, 07, 07:11 PM
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Re: Is 275's too big for a 67?

Quote:
Originally Posted by fireeater View Post
How about a 275 with a 9" wheel? Can I get away with 5.00 backspacing?
that's what i run, but i did have to trim the wheel well opening. it's a 69, so i don't know if you would have to.
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post #10 of 25 (permalink) Old Aug 18th, 07, 10:22 AM
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Re: Is 275's too big for a 67?

275/40R17 or 275/50R17? I run the 275/50R17 on an 8" rim with 5" back spacing and it fits with lots of clearance. I plan to run 325/50R17s on either 9" or 9.5" rims when these wear out. This is on a 67 Firebird with a Moser 9".
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post #11 of 25 (permalink) Old Aug 18th, 07, 06:24 PM
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Re: Is 275's too big for a 67?

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Originally Posted by Sporter View Post
275/40R17 or 275/50R17? I run the 275/50R17 on an 8" rim with 5" back spacing and it fits with lots of clearance. I plan to run 325/50R17s on either 9" or 9.5" rims when these wear out. This is on a 67 Firebird with a Moser 9".
i run the 275/40. are you sure you want a tire that's almost 30 inches tall? that's huge! you'll need a very low rear gear, too. you must be tubbed, right?
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post #12 of 25 (permalink) Old Aug 18th, 07, 07:36 PM
 
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Re: Is 275's too big for a 67?

Back again.

I daily drove my car w/ old style, L-60/14's on 9" Fenton slotted mag's w/ 3.5" b/s!!

They are still mounted and up on my top shelf in my garage!!

They measure a modern 298/53-14 so go from there!!

I had to run coil-overs to raise her like 4" to 4.5"s to keep from cutting my tire roll/corners!!

I figure that a 17" x 26.5" tall tire w/ a 12" section width on a 10" rim w/ a 5.25" b/s will fit fine !!!

And I'm going to find a pair of real slicks that size too.

pdq67



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post #13 of 25 (permalink) Old Aug 18th, 07, 08:56 PM
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Re: Is 275's too big for a 67?







Stock tubs and with over 500 ft-lbs @3800 rpm at the rear wheels I've actually had to reduce my gearing from 3.70 to 3.50s to try to hook the torque. Especially when I hit the nitrous and the torque jumps to nearly 700 rwtq. Both the 275/50R17s and 325/50R17s are 28" tall. About perfect for my car. Taller tires hook a bit better than shorter tires and since we're still talking a 50 series 17" DR tire my handling has not suffered at all. I had 25.5" 265/40R17s on before and they hooked rather poorly.


Quote:
Originally Posted by guccieng View Post
i run the 275/40. are you sure you want a tire that's almost 30 inches tall? that's huge! you'll need a very low rear gear, too. you must be tubbed, right?
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post #14 of 25 (permalink) Old Aug 18th, 07, 10:03 PM
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Re: Is 275's too big for a 67?

"Both the 275/50R17s and 325/50R17s are 28" tall."

the 325/50r17 cannot be the same height as the 275/50r17. with the 50 aspect ratio, 50% of 275 is not equal to 50% of 325. the tci calcualtors put it at 29.8 inches tall:

http://www.tciauto.com/Products/Tech...alculators.asp

a 325/45 will put you at 28.5, still taller than the 275/50r17.
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post #15 of 25 (permalink) Old Aug 18th, 07, 10:11 PM
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Re: Is 275's too big for a 67?

275/50R17 = 28"
http://www.mandhtires.com/store.php?...on=show_detail

325/50R17 = 28" height
http://www.mandhtires.com/store.php?...on=show_detail

Argue with them.
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