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73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: 101 airborne on April 25, 2018, 07:34:33 PM

Title: 83 chev K20 military
Post by: 101 airborne on April 25, 2018, 07:34:33 PM

What is the max tire size with out body or suspension lift mods ? I have 4.56 gears with 16.5 x 9.50 which measure about 29.5 tall. I want to change to 16 inch rims but don't know which backspacing to get to work with bigger tires for clearance. Thanks from Kansas .

Title: Re: 83 chev K20 military
Post by: Irish_Alley on April 25, 2018, 08:04:15 PM

i may be 100% wrong but i thought all military trucks were k30s except for the k5

also take a look here
http://forum.73-87chevytrucks.com/smforum/index.php?topic=31301.0
i did a little information gathering about tires/lifts. i have a 91 k3500 crew cab, with no lift and i was able to squeeze 33s under mine

Title: Re: 83 chev K20 military
Post by: 1967KaiserM715 on April 25, 2018, 09:13:41 PM

Canadians used K20 and K30, not to familiar with the time frame, but did use GM trucks earlier then the US.

As for tires and backspacing, a no lift, 33" may fit, 32" definitely.  A thinner rim and 235/85/16s will look good, with a 4" backspace. As long as there is less then 4" backspace I think any other width of tire can also be accommodated.

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