What Backspacing is Ideal for me? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**KyleSeal** · 02-04-2017, 01:23 AM

Looking into ordering some either 15 or 16 inch rims for my 70, I currently have a 5.5/7 drop on my truck (not driving yet, still working on paint), and am looking for some original appearing rims on Summit.

I know backspace for stock is 4.00", is this ideal for my drop? Also, should I run a 15 or 16x8 or a 15 or 16x7?

Tips and ideas are welcome!

Thanks in advance.

James the III · 02-04-2017, 02:05 AM

16" tires are slowly getting limited in size choices.. keep that in mind..

**KyleSeal** · 02-05-2017, 01:08 AM

I'm thinking of going 16 for the height gains. Ill probably get coker white walls.

No one has suggestions on backspacing?

Robznob11 · 02-05-2017, 01:18 AM

Well your very limited in front if you have drop spindles. Any more than 4" bs on a 15 will rubthe a arms. On rear i run a 15x12 wide with 6.5 bs

**KyleSeal** · 02-05-2017, 02:01 AM

Quote:

Originally Posted by Robznob11

Well your very limited in front if you have drop spindles. Any more than 4" bs on a 15 will rubthe a arms. On rear i run a 15x12 wide with 6.5 bs

Got it. Regardless of 15 or 16, what width should I get? 7 or 8 inch? Any tire price benefits between the two? As stated I am running a 5.5/7. Looking to make this a good driver (yes I know it's low and I can handle it)
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Robznob11 · 02-05-2017, 12:00 PM

Honestly your best bet is probably a 7" that way you can run a 225 ish tire. I run a 8" with 255, 60 for the side wall height but that was so wide it rubbed the outer when turning. To solve it i bought 1100$ pb arms to move the wheels in 1". If you go with a 7" you can get a taller tire with out being to wide to rub. You will find that with that much drop a short sidewall puts the xmember and arms way to low for normal driving. I ended up bagging mine for drivability

02-04-2017, 01:23 AM	#1
KyleSeal Senior Member Join Date: Mar 2014 Location: Toano, VA Posts: 882	What Backspacing is Ideal for me? Looking into ordering some either 15 or 16 inch rims for my 70, I currently have a 5.5/7 drop on my truck (not driving yet, still working on paint), and am looking for some original appearing rims on Summit. I know backspace for stock is 4.00", is this ideal for my drop? Also, should I run a 15 or 16x8 or a 15 or 16x7? Tips and ideas are welcome! Thanks in advance. __________________ "Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809

02-04-2017, 02:05 AM	#2
James the III Registered User Join Date: Nov 2016 Location: lowell ma Posts: 750	Re: What Backspacing is Ideal for me? 16" tires are slowly getting limited in size choices.. keep that in mind..

02-05-2017, 01:08 AM	#3
KyleSeal Senior Member Join Date: Mar 2014 Location: Toano, VA Posts: 882	Re: What Backspacing is Ideal for me? I'm thinking of going 16 for the height gains. Ill probably get coker white walls. No one has suggestions on backspacing? __________________ "Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809

02-05-2017, 01:18 AM	#4
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: What Backspacing is Ideal for me? Well your very limited in front if you have drop spindles. Any more than 4" bs on a 15 will rubthe a arms. On rear i run a 15x12 wide with 6.5 bs __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

02-05-2017, 12:00 PM	#6
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: What Backspacing is Ideal for me? Honestly your best bet is probably a 7" that way you can run a 225 ish tire. I run a 8" with 255, 60 for the side wall height but that was so wide it rubbed the outer when turning. To solve it i bought 1100$ pb arms to move the wheels in 1". If you go with a 7" you can get a taller tire with out being to wide to rub. You will find that with that much drop a short sidewall puts the xmember and arms way to low for normal driving. I ended up bagging mine for drivability __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS



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