correct backspacing on 2wd 1/2ton stepper??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72step · 03-06-2004, 07:39 PM

I'm in the process of ordering me some wheels, but who out there know's the correct standard backspacing on the rear of a stepside on a 15x8 inch wheel with a stock diffeential? I currently have 15x10's with 4.5" offset, and the tire is like 3/4" from the bed, and I can't afford to go out anymore because the tire would stick out of the fender, therefore have decided on some 15x8 torque thrust II's Thanks in advance!!!

72step · 03-06-2004, 09:52 PM

anyone????

djracer · 03-06-2004, 10:15 PM

If the tens fit i'd stay with 10's but an 8 with 3.5 inch of backspace should be the same offset you have now because you are taking an inch of each side of the wheel!

gr8scott51 · 03-07-2004, 12:30 AM

4-1/2" backspace is stock on 15 x 8 rims. My tires are about 3/4" from the box, too. The local Les Schwab tire store told me the torque thrusts wouldn't fit, but I never tried.

Good luck, scott

72step · 03-07-2004, 02:16 AM

Thanks. I think the 15x8 torque thrusts with the 3.5" backspace will work. Any other experiences?

FirstGen · 03-07-2004, 07:33 PM

Mathmatically, going from a 10" wide wheel with 4.5 backspace to a 8" wheel with 3.5 backspace will work out to have exactly one inch more clearance on each side of the new 8" wheel... so if you had 3/4 inch on each side clearance on the 10" wheel you will have 1.75" on each side of the 8" wheel.

I'd like to see some pictures of the 10" that you have now if you have any...
Good Luck

Bowtie67 · 03-08-2004, 09:46 AM

I have been running another type of wheel when ordering my new Tourque Thrust wheels and I needed check my old ones, my old ones where 9.5 x 15, and they had a backspace of 3.75 inches, with the tires 295/50 they would just barely hit the inner bed panel. 67 stepside I added a 1/4 spacer to resolve problem. my new wheels I ordered a 10x15 with a 3.5in backspace. hope that helps.

72step · 03-08-2004, 12:18 PM

Here's a pic of my truck currently. Let's see if this works.

72step · 03-08-2004, 12:21 PM

Firstgen, naw, I can't seem to shrink my pics down enough, sorry. Give me your email, and I'll email ya a pic.

FirstGen · 03-08-2004, 06:26 PM

ok thanks!
unlimitedlandscape@hotmail.com

03-06-2004, 07:39 PM	#1
72step Registered User Join Date: Nov 2000 Location: chimayo, nm, usa Posts: 898	correct backspacing on 2wd 1/2ton stepper??? I'm in the process of ordering me some wheels, but who out there know's the correct standard backspacing on the rear of a stepside on a 15x8 inch wheel with a stock diffeential? I currently have 15x10's with 4.5" offset, and the tire is like 3/4" from the bed, and I can't afford to go out anymore because the tire would stick out of the fender, therefore have decided on some 15x8 torque thrust II's Thanks in advance!!! Last edited by 72step; 03-06-2004 at 09:50 PM.

03-06-2004, 10:15 PM	#3
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,891	If the tens fit i'd stay with 10's but an 8 with 3.5 inch of backspace should be the same offset you have now because you are taking an inch of each side of the wheel! __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

03-07-2004, 12:30 AM	#4
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	4-1/2" backspace is stock on 15 x 8 rims. My tires are about 3/4" from the box, too. The local Les Schwab tire store told me the torque thrusts wouldn't fit, but I never tried. Good luck, scott __________________ Silence is golden, duct tape is silver. - Scott

03-07-2004, 07:33 PM	#6
FirstGen Just Don't Stop! Join Date: Feb 2004 Location: Dallas Posts: 1,239	Mathmatically, going from a 10" wide wheel with 4.5 backspace to a 8" wheel with 3.5 backspace will work out to have exactly one inch more clearance on each side of the new 8" wheel... so if you had 3/4 inch on each side clearance on the 10" wheel you will have 1.75" on each side of the 8" wheel. I'd like to see some pictures of the 10" that you have now if you have any... Good Luck __________________ 1968 C10 build in process TT LSA/6L90e/9"

03-08-2004, 06:26 PM	#10
FirstGen Just Don't Stop! Join Date: Feb 2004 Location: Dallas Posts: 1,239	ok thanks! unlimitedlandscape@hotmail.com __________________ 1968 C10 build in process TT LSA/6L90e/9"

03-06-2004, 09:52 PM	#2
72step Registered User Join Date: Nov 2000 Location: chimayo, nm, usa Posts: 898	anyone????

03-07-2004, 02:16 AM	#5
72step Registered User Join Date: Nov 2000 Location: chimayo, nm, usa Posts: 898	Thanks. I think the 15x8 torque thrusts with the 3.5" backspace will work. Any other experiences?

03-08-2004, 09:46 AM	#7
Bowtie67 Registered User Join Date: Jan 2004 Location: NH Posts: 2,266	I have been running another type of wheel when ordering my new Tourque Thrust wheels and I needed check my old ones, my old ones where 9.5 x 15, and they had a backspace of 3.75 inches, with the tires 295/50 they would just barely hit the inner bed panel. 67 stepside I added a 1/4 spacer to resolve problem. my new wheels I ordered a 10x15 with a 3.5in backspace. hope that helps.

03-08-2004, 12:18 PM	#8
72step Registered User Join Date: Nov 2000 Location: chimayo, nm, usa Posts: 898	Here's a pic of my truck currently. Let's see if this works.

03-08-2004, 12:21 PM	#9
72step Registered User Join Date: Nov 2000 Location: chimayo, nm, usa Posts: 898	Firstgen, naw, I can't seem to shrink my pics down enough, sorry. Give me your email, and I'll email ya a pic.

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