Anyone ran 295/65r15 Rear Tires in a ‘66? - Chevelle Tech
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post #1 of 9 (permalink) Old Nov 11th, 19, 12:00 AM Thread Starter
 
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Anyone ran 295/65r15 Rear Tires in a ‘66?

Hey Guys,

I was wondering if anyone has been able to run rear 295/65r15’s in an unmodified rear end on a ‘66 chevelle. I’m currently running 255/60r15’s and want to fill out the wheel wells more. Car has a factory 12 bolt Posi and has 1/4” more clearance from the outside quarter on the passenger side than the driver side. I would like to run 15x8’s to avoid the lower shock mount clearance issue that comes from 15x10’s. I’m okay with a little side wall bulge to avoid making modifications to the mounts. If I can’t run these without making modifications to the wheel well lips or inner fender wells, I assume I can easily run 275/60r15’s.
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post #2 of 9 (permalink) Old Nov 11th, 19, 8:50 AM
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Re: Anyone ran 295/65r15 Rear Tires in a ‘66?

Not a great answer to your question, but I tried those on my ‘68 El Camino. I got the backspacing right to get them to fit, but had two issues. The sidewalls, being very tall, would flex quite a bit and would rub slightly on cornering. I played with various wheel spacers and whacked the heck out of my inner fenders for clearance. I got them so that the rubbing was infrequent, but never did get it completely eliminated. Also, they sit very tall causing the rear of the car to sit quite high in the air with the stock springs. Lowering for the proper look wasn’t an option due to the clearance/rubbing issue. I finally switched to 275/60-R15’s.

Certainly the ‘68 and ‘66 wheel wells are different, but I imagine that, if anything, the ‘68 would have more clearance.
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post #3 of 9 (permalink) Old Nov 11th, 19, 10:18 PM Thread Starter
 
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Quote:
Originally Posted by any4xx View Post
Not a great answer to your question, but I tried those on my ‘68 El Camino. I got the backspacing right to get them to fit, but had two issues. The sidewalls, being very tall, would flex quite a bit and would rub slightly on cornering. I played with various wheel spacers and whacked the heck out of my inner fenders for clearance. I got them so that the rubbing was infrequent, but never did get it completely eliminated. Also, they sit very tall causing the rear of the car to sit quite high in the air with the stock springs. Lowering for the proper look wasn’t an option due to the clearance/rubbing issue. I finally switched to 275/60-R15’s.

Certainly the ‘68 and ‘66 wheel wells are different, but I imagine that, if anything, the ‘68 would have more clearance.
Do you like the way the 275’s fill the wheel wells?
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post #4 of 9 (permalink) Old Nov 11th, 19, 11:37 PM
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Smile Re: Anyone ran 295/65r15 Rear Tires in a ‘66?

Quote:
Originally Posted by Alex66SS396 View Post
Do you like the way the 275’s fill the wheel wells?

How full do you need 'em?
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post #5 of 9 (permalink) Old Nov 12th, 19, 2:01 AM
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Re: Anyone ran 295/65r15 Rear Tires in a ‘66?

I used to run 295/50/15s on my '66, so a much shorter tire. Unmodified '66 12-bolt rearend and uncut fender lips. using 15X8 wheels with about 5" of backspacing... The car was also EXTREMELY lowered, so the sidewall clearance was really crucial.


Sorry I don't have a better picture available.

BTW, there is actually less bulge with a 15X8 than with a 15X10 wheel, as the narrower wheel pulls the sidewalls in further, reducing any protruding bulge of the sidewall. It adds a little more clearance.

Back when I was running these (mid 1990s-mid-2000s), the 15X8 was actually within the manufacturers "recommended" wheel width for that tire (but the narrowest recommended), and that's with the short sidewall.

Once you go RAT, you never go back...
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post #6 of 9 (permalink) Old Nov 12th, 19, 8:33 AM
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Re: Anyone ran 295/65r15 Rear Tires in a ‘66?

Quote:
Originally Posted by Alex66SS396 View Post
Do you like the way the 275’s fill the wheel wells?
Yes. They look “correct” in there.
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post #7 of 9 (permalink) Old Nov 12th, 19, 11:22 AM
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Re: Anyone ran 295/65r15 Rear Tires in a ‘66?

A guy I know runs a M/T 29.5x10.5-15 slick on a 67 Chevelle. It uses a stock width rearend housing and 15x8 weld pro stars with 4.5 backspace.

This is with a very low ride height, lower control arms parallel with the frame. I believe a 295/65/15 is similar in size.
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post #8 of 9 (permalink) Old Nov 12th, 19, 12:42 PM
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Re: Anyone ran 295/65r15 Rear Tires in a ‘66?

Alex like Tom says the tall 65 Tire will have problems Up in on the Outside Fender inside because how the Inner Fender curves inward

Also you could have problems with the Front part of the Fender/1/4 Panel just behind the Doors
as the 65 Tire is 30+" in Diameter as I found that a 28" Diameter Tire was the Max for my 67 Chevelle

I run on the Street and at the Track a M/T ET Street S/S #3454 295/55/15
which = 27.7” Dia. / 10.6” Tread Width / 12.2” Sidewall Width on 15" x 10" Wheels with a 5.5" BS





My 67's Fenderwells Total Wheel Well Space = 13" ( Fender Lip to Frame )
Outside Space = 5.92" Fender Lip to Wheel Mounting Face on Drum Brake Hub
Inside Space = 7.08" Wheel Mounting Face on Drum Brake Hub to Frame/Inner Fender

Stock Width Rearend of 60" Face of Drum Brake on Dr Side to Face of Drum Brake on Pass Side

Stock Height Springs from Moog #5385

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #9 of 9 (permalink) Old Nov 13th, 19, 11:21 AM
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Re: Anyone ran 295/65r15 Rear Tires in a ‘66?

https://www.chevelles.com/forums/17-...l#post11002546

Check out post #6 by Motorhead62
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