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Old 08-12-2006, 11:15 AM   #1
shelby987
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Location: Just outside Durham, NC
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stock tire size

Tried the search function, but it appears to be down, can anyone tell me what the stock tire size on a 70 k20 would have been?

Looking to recalibrate my speedo also, stepping up tire size, and swapping rear gears, any leads to a site that can help would be appreciated.
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1969 SS 350 Camaro Sold 2008
1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's
1980 Chevy Malibu 2 dr Sold 2007
1993 Olds. Cutlass Ciera Wagon Traded 2006
2003 Saturn L200 w/5pd. D/D
My list spans 5 decades with One common thread.....GM!
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Old 08-12-2006, 01:52 PM   #2
Robert1970C20rstbukt
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Re: stock tire size

7.5-16 bias ply tires on split rims. My truck had 'em and I got the originals from my Suburban too. You could special order other sizes, just a couple I remember seeing: 8.75-16.5, 9.5-16.5, 10-16.5, and 12-16.5. I think the biggest 16.5" rim back then was 8.25" wide. To compare tire sizes this site is a BIG help:

www.1010tire.com
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1984 Chevrolet C30 welding truck 454/SM465
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1969 GMC 8500 478M V6/5 spd winch truck
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Old 08-12-2006, 02:03 PM   #3
Chevyman680063
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Re: stock tire size

I know that Jim Carter Classic Truck Parts will rebuild/recalibrate your speedo. I emailed them about mine a few months ago and they said they would do it for $145 with a $60 core. Their website is www.oldchevytrucks.com.
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