'69 Nova rear tire/rim backspacing? [Archive] - Nova Tech

: '69 Nova rear tire/rim backspacing?


cw41
Oct 27th, 08, 11:36 AM
I would like to put 275-60-15's on the rear but unsure of the proper rim backspacing or to use 15x7 or 15x8. I'd rather not cut or roll the lip unless necessary. Thanks for any advice.
Chuck

SHIFTY4
Oct 27th, 08, 01:29 PM
Chuck, the 2QuickNova's tire fitment page lists numerous applications that might help. http://www.2quicknovas.com/6874.html the listings are supplied by the car owners, some have better descriptions than others but they state if they have rubbing issues, what backspacing they used, rolled or non rolled lips etc... may not be the encyclopedia of tire fitment sites but it's by far the best out there... read & look at the images... maybe it'll be of assistance to ya.



JR

brian oneil
Oct 27th, 08, 02:46 PM
I used many moons ago a 275-60 15 on a 15x7 rim with a 3.5" BS and i did not need to roll the wheel opening and I never had tire clearance issues.

The Big Al
Oct 28th, 08, 01:00 PM
I have the very tire now.

been mounted on two different rims.

15x8 with a min of 5 inch backspace. (it will be close to the lip.

15x8 with 5.5 inch Back space is a perfect fit. This does limit wheel availability.

The wheels by Summit and Weld Racing will work.
Warning, the 15x8 5.5 BS wheel by Greg Weld, will not clear Disc brakes. (Greg Weld is different than Weld racing)

This is the same tire 275/60-15 Cooper Cobra Tires.

http://img371.imageshack.us/img371/1250/novabackwheelsbscompairsb9.jpg

Al

rj67bu
Oct 28th, 08, 09:38 PM
hey big Al, i have the same tire and wheel bs 5.5 mine rub on the inner wheel well have you mini tubed it? i have a split mono with an 1.5" drop looks similar to your ride height, but can't turn left to save my life with out rubbing the pas. side driver side rubbs also not as bad I have a 1/4" clearance on the pas side and a little more on driver side. what shocks do you have, and do you have a sway bar?:confused:

The Big Al
Oct 28th, 08, 09:44 PM
hey big Al, i have the same tire and wheel bs 5.5 mine rub on the inner wheel well have you mini tubed it? i have a split mono with an 1.5" drop looks similar to your ride height, but can't turn left to save my life with out rubbing the pas. side driver side rubbs also not as bad I have a 1/4" clearance on the pas side and a little more on driver side. what shocks do you have, and do you have a sway bar?:confused:

No mini tub

Your car been wrecked?

Your split link with that 1.5 drop is your problem!

I have had this combo on 4each, gen 3 Novas with no issue.

Al

rj67bu
Oct 28th, 08, 10:20 PM
as far as i know it hasnt, undernieth is pretty straight no wrinkles I just realized that i PM'd you once and you told me it was a tight fit. as far as rear end not being centered from listening to other people i assumed this was normal driver side is probably 3/16 and passenger is 1/4 so probably just the point i measured from. thanks for info Big Al

68chevyll
Nov 8th, 08, 04:19 PM
I can't fit 5.5" bs either. I run 4.5" bs

Thorpedo
Nov 18th, 08, 10:03 PM
I've been to 2quicknovas site, and they have tried a variety of tire and wheel combos.
I thinking about running 225/70/15's on the front on 15x7 w/4"bs, and 255/60/15's on the rear on 15x8 w/4.5" bs. Any opinions on clearance issues?

BTW, http://www.miata.net/garage/tirecalc.html is a good, interactive tire calculator.

68chevyll
Nov 20th, 08, 09:44 PM
I run 255's with 4.5 bs. You'll be fine.

The Big Al
Nov 21st, 08, 12:43 AM
255/60/15's on the rear on 15x8 w/4.5" bs. Any opinions on clearance issues?


I run 255's with 4.5 bs. You'll be fine.

Thats going to be close!

Al

Thorpedo
Nov 22nd, 08, 02:17 AM
Al, if you think the 15x8 with 4.5" bs is close, what would you recommend 15x7 with 4" bs?

The Big Al
Nov 22nd, 08, 03:26 AM
Al, if you think the 15x8 with 4.5" bs is close, what would you recommend 15x7 with 4" bs?
15x8 rim with a 4.5 back space leaves 3.5'' to the front
15x7 rim with a 4 inch bs leaves a 3'' to the front.
moved in 1/2 inch, plus makes the tire have a smaller section width.

Do you think the section width of the tire is the same with the smaller rim?????
http://img340.imageshack.us/img340/2741/tiresizechartty6.jpg (http://imageshack.us)
http://img175.imageshack.us/img175/3484/tirespecsyh2.jpg (http://imageshack.us)

68chevyll
Nov 22nd, 08, 08:54 AM
Al, if you think the 15x8 with 4.5" bs is close, what would you recommend 15x7 with 4" bs?
My rims are 7" with 4.5bs. Plenty of room. check my sig for pics.

Thorpedo
Nov 24th, 08, 01:52 PM
Big Al, Thanks. That's a pretty comprehensive summary. I did come across a set of
15x7's with 4.25 bs, and that sounds like it should work fine. My next question is I'm running stock exhaust and tailpipes, it appears that the left TP extends into the wheelwell. Has anybody encountered clearance issues wuth the tailpipes?

jimbo68
Nov 25th, 08, 12:35 AM
I run 15x8's with 5" inch backspacing with a 275/60/15 on my 68. I tried a 4.5 b/s and the quarter would have sat on the tread had I let the jack all the way down.http://i356.photobucket.com/albums/oo5/1968deuce/novapics174.jpg

The Big Al
Nov 25th, 08, 03:43 AM
15x8 5.5 bs 275/60-15

http://img367.imageshack.us/img367/3268/img1286adp8.jpg (http://imageshack.us)

brian oneil
Nov 26th, 08, 08:36 PM
I run 15x8's with 5" inch backspacing with a 275/60/15 on my 68. I tried a 4.5 b/s and the quarter would have sat on the tread had I let the jack all the way down.http://i356.photobucket.com/albums/oo5/1968deuce/novapics174.jpg

15x8 5.5 bs 275/60-15

http://img367.imageshack.us/img367/3268/img1286adp8.jpg (http://imageshack.us)


both very beautiful cars :thumbsup: