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Old 10-09-2017, 08:22 PM   #1
Jered1987
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Join Date: Aug 2017
Location: Berkshire ny
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Tire replacement

What size tire can I replace a set of 255 85 16r with they seem to be an expensive size. It's on a 86 k10
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Old 10-10-2017, 07:58 AM   #2
cadillac_al
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Location: Maine
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Re: Tire replacement

You must have aftermarket rims. 255/85r16 is about the perfect size for these trucks but 15's are cheaper. 16's are usually 10 ply so they cost more.
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76 GMC K15
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Old 10-10-2017, 01:01 PM   #3
Jered1987
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Re: Tire replacement

My wife's grandfather built the truck a lot of stuff has been changed on it and a lot of different years of parts into it. I think the engine and trans are out of a 76 Camaro. The drivetrain is a 85. The engine has had all emissions removed and all electronics taken off. For some reason he did away with the hei I guess . It doesn't run right as it won't idle without feathering the gas and that's even with it warm. The windshield wipers won't work there's a bit to do.
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Old 10-17-2017, 10:32 PM   #4
tucsonjwt
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Location: Tucson, AZ
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Re: Tire replacement

I have 235/85R16 on my 83 C20, so I don't know about a K10, but I recently got some 225/70R16 for the front of my truck and I did not realize what a difference there was in just a few numbers. The front tires lower the truck about 1.5-2 inches in the front. Reminds me of high school.
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Old 10-19-2017, 07:17 PM   #5
LT7A
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Join Date: Oct 2015
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Re: Tire replacement

You can use an online "tire size calculator" to determine what you want: taller/shorter, wider/narrower and then search for that size and see what comes up. Seeing what tirerack and discounttire have give you an idea of what's standard and what's oddball. For instance, I recently found that what seems like an oddball size 255/55 r18 is fairly common and not expensive since many manufacturers make them -- stock size on the BMW X5 I guess.
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