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Old 12-14-2019, 02:20 PM   #1
ibinyth
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18x12 backspacing question

Can I run a 18x12 with a 6" backspacing on a late model 70 c10 wider rear end? Truck has no bedfloor or tubs, just bedsides. How close would that get it to flush?
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Old 12-15-2019, 05:08 AM   #2
ibinyth
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Re: 18x12 backspacing question

They also come in 5.5bs

Alternative is 18x11 with either 6bs or 5bs
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Old 12-16-2019, 07:56 AM   #3
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Re: 18x12 backspacing question

You would need to pick the tire you want to run and use a tool like the ones listed in the link below. The tire is what you have to make fit and the tool will tell you the rim you need.
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Old 12-16-2019, 11:04 AM   #4
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Re: 18x12 backspacing question

The shorter width 6-lug 12bolts allow about ~10" of back space before you have clearance problems (if the wheel diameter clears) @ the suspension. I ran 15x14" wheels (9.75"BS??) w/widened tubs & the shorter width 12bolt

So, will your proposed combo's 'fit' with the wider housing? They can. Will they look right? Only way to know is to measure your set-up. I would bet if the truck is lower than stock height, there will be issues @ the bedside requiring more back spacing. My best WAG is you need closer to ~8" BS w/the wider rear housing if the truck is lowered & you don't want to have to worry about rubbing @ the bedside.
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Old 12-17-2019, 05:21 PM   #5
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Re: 18x12 backspacing question

What wheels are you looking at?
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