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**hatzie** · 08-12-2018, 05:36 PM

You run the risk of rubbing when you make sharp turns at anything larger than 32".
Some trucks will rub and some won't at 33".
It seems to be a crapshoot.
My 76 K20 and My 2000 C2500 GMT400 rub on the 33" tires that I am running on the CUCV. My 2005 2500HD had to be cranked up to fit 285/75R17 tires. I cranked it back down to stock height and swapped to 265/75R17 Michelins to stop the bouncy bouncy bouncy ride.
I've had several 3/4 & 1 ton trucks that rubbed on 33" tires and several that didn't.
Not year or build plant specific. Seemingly, no rhyme or reason. They just did or didn't. IMHO $800-$900 is a bit much to spend on maybe. 32" is a good safe number. Never ever had one rub with 31.6" or 32" tires. 31.6" - 32" tires are big enough to stop the truck from looking like it has four rubber bands on the wheels.

08-12-2018, 05:36 PM	#12
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,915	Re: Tires for a K20 Driver You run the risk of rubbing when you make sharp turns at anything larger than 32". Some trucks will rub and some won't at 33". It seems to be a crapshoot. My 76 K20 and My 2000 C2500 GMT400 rub on the 33" tires that I am running on the CUCV. My 2005 2500HD had to be cranked up to fit 285/75R17 tires. I cranked it back down to stock height and swapped to 265/75R17 Michelins to stop the bouncy bouncy bouncy ride. I've had several 3/4 & 1 ton trucks that rubbed on 33" tires and several that didn't. Not year or build plant specific. Seemingly, no rhyme or reason. They just did or didn't. IMHO $800-$900 is a bit much to spend on maybe. 32" is a good safe number. Never ever had one rub with 31.6" or 32" tires. 31.6" - 32" tires are big enough to stop the truck from looking like it has four rubber bands on the wheels. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.