How do I determine backspacing? - Pirate4x4.Com : 4x4 and Off-Road Forum

Camotoy · 07-19-2003, 10:57 AM

My B-Day is coming up and my girl wants to buy me some new wheels. I have a 1983 toyota pickup 4x4 and am mostly stock. I will soon be converting to hy-steer crossover and I'm about to start my spring swap. I want to be able to keep these wheels while building up my rig so how do I deterine what back spacing to get? The wheels will be 15x8 if thats any help, and will be on my 31" BFG's. They will shortly be mounting some 35x12.50 Goodyear MTR's. Thanks for the help.

Pazuzu · 07-19-2003, 01:11 PM

You have it easy!!! Choose a backspacing, then modify your fenders/lift to make it work!

Go with 3 or 3.25 inches. If you want extreme, go 2 inch, but that sticks the tires out pretty far, puts more stress on the bearings, and you're probably not going big enough to warrent them yet.

Wanna go cheap? Find a joint that sells used tires/rims. Get a set of 15x8 black rockcrawlers or wagon wheels. Most of them were about 3.25 or 3.5 inches BS, I got a set of 3.25 for $60. Sure, they needed a good scratching with some sandpaper, and some coats of cheapo black paint, but they are in great shape now, for about half what you would pay anywhere else.

TNToy · 07-19-2003, 01:52 PM

A 3.5 inch backspaced wheel will allow the tires to rub on the springs while turning sharp with a 36+ inch tire.

I run a 15x8 2" backspaced wheel (black steel) I bought from 4WheelParts for $40 each. Money well spent... no rubbing, and I'll do a weld-on beadlock install someday. 2" Backspaced 15x8 black steel wheels, Toyota bolt pattern:
4 Wheel Parts Part # 515883R2.

2 inch backspaced wheels will look goofy until you get a decent size tire, yes, but you'll only have to buy wheels once. I run a 38.5x14.50 with no rubbing on that wheel, and no need to spend extra $$$ on wheel spacers.

Pazuzu · 07-19-2003, 05:07 PM

Quote:

Originally posted by TNToy
A 3.5 inch backspaced wheel will allow the tires to rub on the springs while turning sharp with a 36+ inch tire.

I don't have that problem!

My front springs are well protected from the tires, they'd have to grind through the frame to get to the springs

The Rockslut · 07-19-2003, 05:16 PM

http://www.usa6x6.com/military/rims/...asurements.jpg

07-19-2003, 10:57 AM	#1 (permalink)
Camotoy Registered User Join Date: Jul 2003 Member # 21068 Location: Tucson, Arizona Posts: 353	How do I determine backspacing? My B-Day is coming up and my girl wants to buy me some new wheels. I have a 1983 toyota pickup 4x4 and am mostly stock. I will soon be converting to hy-steer crossover and I'm about to start my spring swap. I want to be able to keep these wheels while building up my rig so how do I deterine what back spacing to get? The wheels will be 15x8 if thats any help, and will be on my 31" BFG's. They will shortly be mounting some 35x12.50 Goodyear MTR's. Thanks for the help. __________________ [url]www.wheelingarizona.com[/url] [url]www.crawlinaz.com/forum[/url]

07-19-2003, 01:52 PM	#3 (permalink)
TNToy Registered User Join Date: Jul 2001 Member # 5776 Location: Memphis, TN Posts: 11,737	A 3.5 inch backspaced wheel will allow the tires to rub on the springs while turning sharp with a 36+ inch tire. I run a 15x8 2" backspaced wheel (black steel) I bought from 4WheelParts for $40 each. Money well spent... no rubbing, and I'll do a weld-on beadlock install someday. 2" Backspaced 15x8 black steel wheels, Toyota bolt pattern: 4 Wheel Parts Part # 515883R2. 2 inch backspaced wheels will look goofy until you get a decent size tire, yes, but you'll only have to buy wheels once. I run a 38.5x14.50 with no rubbing on that wheel, and no need to spend extra $$$ on wheel spacers. __________________ [size=1]ASE Certified Master Automotive Technician Toyota Certified Expert Technician Volvo Certified Expert Technician Suzuki Certified Master Technician IDPA Certified Master Cardboard Killer[/size] Last edited by TNToy; 07-19-2003 at 01:53 PM.

07-19-2003, 05:16 PM	#5 (permalink)
The Rockslut Registered User Join Date: Jun 2001 Member # 5021 Location: Lincoln, CA Posts: 5,967	http://www.usa6x6.com/military/rims/...asurements.jpg __________________ Don't be "THAT GUY" on the trail. www.voodoowax.com

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07-19-2003, 01:11 PM	#2 (permalink)
Pazuzu Registered User Join Date: Feb 2000 Member # 54 Posts: 4,854	You have it easy!!! Choose a backspacing, then modify your fenders/lift to make it work! Go with 3 or 3.25 inches. If you want extreme, go 2 inch, but that sticks the tires out pretty far, puts more stress on the bearings, and you're probably not going big enough to warrent them yet. Wanna go cheap? Find a joint that sells used tires/rims. Get a set of 15x8 black rockcrawlers or wagon wheels. Most of them were about 3.25 or 3.5 inches BS, I got a set of 3.25 for $60. Sure, they needed a good scratching with some sandpaper, and some coats of cheapo black paint, but they are in great shape now, for about half what you would pay anywhere else.