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?

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

Is 5.5" the backspacing I want?

Yep

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

pdq67

How about a 275 with a 9" wheel? Can I get away with 5.00 backspacing?

You want to get really confused? Read this - lots of good info. http://www.pro-touring.com/forum/showthread.php?t=10840&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.

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.

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.

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".

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?

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

http://memimage.cardomain.net/member_images/4/web/412000-412999/412680_210_full.jpg


http://memimage.cardomain.net/member_images/4/web/412000-412999/412680_246_full.jpg


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. ;)


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?

"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/TechInfo/Calculators.asp

a 325/45 will put you at 28.5, still taller than the 275/50r17.

275/50R17 = 28"
http://www.mandhtires.com/store.php?crn=70&rn=294&action=show_detail

325/50R17 = 28" height
http://www.mandhtires.com/store.php?crn=70&rn=305&action=show_detail

Argue with them.

275/50R17 = 28"
http://www.mandhtires.com/store.php?crn=70&rn=294&action=show_detail

325/50R17 = 28" height
http://www.mandhtires.com/store.php?crn=70&rn=305&action=show_detail

Argue with them.
The 325 is a 45 series thats why its the same hieght as the 275/50 on their website.

You may want to consider getting a rim with a bit more backspace than you think you need. It is a lot easier to add a 1/4" spacer than to have new rims made.

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".

Sporter can you also post your front tire/rim specs?

Thanks!

235/40-17s up front. No scrubbing on the fender but light scrubbing on the frame on tight inclined turns.

325/25.4 (conversion of MM to inches) =12.79. 12.79 + 17 = 29.79 tire diameter

275/25.4 = 10.83. 10.83 + 17 = 27.83 tire dia

You can also put the tire size, rear end and tranny gears into this calculator and it will calculate the tire diameter for you. http://www.f-body.org/gears/

The 325 is a 45 series thats why its the same hieght as the 275/50 on their website.

:clonk: Well, that explains that. I've got to cut back on these 16 hour days....

We have slight inside rubbing over bumps with 275/40 17s on rear with 9.5" rim and 5.5" back space.

And fwiw, I ran old Firestone 9.50/14 mud&snow tires on my car using my coil-overs and my stock 14" x 6" rims w/ 3.75" b/s years ago.

They measured like 29.5" tall!!

And I got an old pic of them on my car..

He, He!! Speedometer when from 70 to 82 mph at 30/3100 rpm!!

pdq67

275/50R17 = 28"
http://www.mandhtires.com/store.php?crn=70&rn=294&action=show_detail

325/50R17 = 28" height
http://www.mandhtires.com/store.php?crn=70&rn=305&action=show_detail

Argue with them.

If you look at your bottom link it shows a 325/45R17 as 28".
Opp's, posted reply before looking at pg 2.

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

pdq67


No way a 295 is gonna fit if the car is lowered at all. Sounds like your car had a mean rake to it. I think he is going for the P/T looks and that means the car is either getting lowered or already is low.