wheels

Tire sizing and wheel offset.

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wheels

Postby daniel202010 » Tue Feb 04, 2014 2:56 am

i picked up a set of boss 304 18" that come off a newer camaro what kind of spacer should i use or is it kind of a trial and error thing
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Re: wheels

Postby redneckgames » Tue Feb 04, 2014 4:47 pm

Read up on what backspacing is and how it is measured. Also on lug patterns, bolt circles, etc. That way you learn how to get the answer, and not just learn the answer.
Brad

85 S10: 350/350 combo, Dart 200P Pro1s, 10.5:1, Lunati 40150 244/249 @ 50 .565/.543, Air-Gap, 650 DP
88 Iroc: 97 Vortec 350 w/lt4 hot cam, A4, 3.73
67 Chevelle SS: 396, 4 speed, 3.73
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Re: wheels

Postby daniel202010 » Tue Feb 04, 2014 5:28 pm

okee dokee
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Re: wheels

Postby lowblazin94 » Tue Feb 04, 2014 9:00 pm

That's why he is here.

What's the bolt pattern of those? Find the bolt pattern and backspacing and we'll go from there. If I wasn't on this damn old phone I'd look more up.
92 S10 Ext cab
385
700r4
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Re: wheels

Postby daniel202010 » Tue Feb 04, 2014 11:31 pm

i know the bolt pattern is right just gotta try to measure the back space on them . they are in my suburbon and the wife has it at work .
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Re: wheels

Postby daniel202010 » Wed Mar 05, 2014 3:41 am

ok guys i have looked it up and i am 95 percent sure backspacing on the 18" wheels is 6.013 and off set 40mm and from what i have also read that our trucks have a 4.5 backspacing . so would i just do simple subtraction and that is the spacers i need . guys i'm sorry for the stupid question ,well that is how redneckgames made me feel .
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Re: wheels

Postby daniel202010 » Wed Mar 05, 2014 6:16 am

if that is the case i would need a 1.5" spacer right or wrong .. i have read up guys . i really have and it seems like the more i try to understand this mess the more confused i become ....
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Re: wheels

Postby Rickracer » Wed Mar 05, 2014 6:54 am

I would lay a straight edge across the back of the wheel, (even better if it has the tire mounted), then measure down to the wheel mounting surface on the wheel. Do the same from the WMS of the axle or hub, straight edge up to the height of the widest part of the wheel/tire assembly, then measure to the closest part of the body/wheel well, add whatever kind of clearance you feel safe with, and there you have it. I am not a believer in charts and/or graphs, I prefer to measure for myself, :wink: :thumbup:
Rickracer
ASE Certified Master Automotive Technician (well over 3 decades of experience, :thumbup: )
'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 7.76 in the 1/8th, 12.24@109.27 mph in the 1/4, gonna spray it one of these days... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
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Re: wheels

Postby redneckgames » Wed Mar 05, 2014 7:24 pm

Wasn't my intent, sorry about that. Its just that sometimes if you struggle with it for awhile, you will truly learn it, not just get an answer. That's how I learned this, now I understand it.

First off, offset is real confusing. Don't even worry about that. Offset is just another way of describing the backspacing, but in more confusing terms. Just worry about backspacing and wheel width. But you are right about 1.5". If the wheels are 6" BS, (which you should measure like Rick said to be certain), then if you were able to bolt them up, then the inner portion of the wheel would be 1.5" further in then the stock wheel at 4.5". So in order to have the inside lip of the wheel in the same position as a stock wheel, you would need a 1.5" spacer.

But measuring and even mocking up a wheel is always good if possible.
Brad

85 S10: 350/350 combo, Dart 200P Pro1s, 10.5:1, Lunati 40150 244/249 @ 50 .565/.543, Air-Gap, 650 DP
88 Iroc: 97 Vortec 350 w/lt4 hot cam, A4, 3.73
67 Chevelle SS: 396, 4 speed, 3.73
redneckgames
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Re: wheels

Postby daniel202010 » Wed Mar 05, 2014 7:51 pm

thanks guys gotta buy a new tape measure can't find mine
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Re: wheels

Postby daniel202010 » Sat Mar 08, 2014 10:56 pm

straight edge across tire measured right at 6 1/8 do yall think i can get away with the 1 1/2 spacer or should i go 1 3/4
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Re: wheels

Postby Rickracer » Sun Mar 09, 2014 6:30 am

Measure it. Make sure you have 1/2" ~ 3/4" of clearance between the tire and the wheel well. :wink: 8)
Rickracer
ASE Certified Master Automotive Technician (well over 3 decades of experience, :thumbup: )
'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 7.76 in the 1/8th, 12.24@109.27 mph in the 1/4, gonna spray it one of these days... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
Rickracer
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Re: wheels

Postby redneckgames » Sun Mar 09, 2014 7:27 am

Take you a long straight edge and run it along the drum/or disc. For a 15" wheel, measure out 7.5" from the center of the axle on the straight edge. Measure from that point back to the leaf, frame, bed, etc. How much room is there? Then add in some clearance like Rick said.
Brad

85 S10: 350/350 combo, Dart 200P Pro1s, 10.5:1, Lunati 40150 244/249 @ 50 .565/.543, Air-Gap, 650 DP
88 Iroc: 97 Vortec 350 w/lt4 hot cam, A4, 3.73
67 Chevelle SS: 396, 4 speed, 3.73
redneckgames
I use coil springs as slinkys.
 
Posts: 164
Joined: Thu May 19, 2011 11:13 am
Location: Lincolnton, NC

Re: wheels

Postby daniel202010 » Sun Mar 09, 2014 7:54 pm

ok thanks guys
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Re: wheels

Postby daniel202010 » Tue Apr 08, 2014 2:20 am

1 1/2 worked out perfect .thanks
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Re: wheels

Postby tagurit » Wed Aug 27, 2014 4:31 pm

Hey guys in a project wanna run 18 inch wheels if I run a 0 offset will I be able to run a 275 40 18 in the back with out cutting or fabing anything? Thanks
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Re: wheels

Postby tagurit » Wed Aug 27, 2014 4:35 pm

Hey guys doin a project 97 s10 wanna do 18 in wheels if I do a 0 offset will I be able to fit a 275 40 18 with out out fabing
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Re: wheels

Postby lowblazin94 » Wed Aug 27, 2014 4:45 pm

Whats the backspacing?
92 S10 Ext cab
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700r4
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