How large of a tire can you mount on a stock 4x4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Lugnutt · 08-16-2007, 10:55 PM

I have a 72 chev K10 with stock suspension. When I first bought the truck I used to run 12.00x16.6 tires and rims (no height labled back then). They only rubbed a little when backing up with the wheel turned just so (no problem). For the last few years I've been running 31 x 11.50 x 15 with no rubbing at all. What would be the tallest tire I could reasonably assume would fit my stock truck without too much rubbing? Would 32 x 11.50 x 15 be too tall? I know the rim offset has something to do with it also... any spec's on that too?

Thanks for your input

msgross · 08-17-2007, 12:52 AM

32x11.5x15 or I am running 33x10.5x15 on 15x8 rims and it seems fine. Doubt 33x12.5 would work on mine....

Batman · 08-17-2007, 09:24 PM

I have 33x12.5R15, no lift and no rubbing.

1969k10stepside · 08-17-2007, 09:33 PM

I ran 33's on a 12 inch wide rim on my 69 for awhile before I lifted it,no rubby

msgross · 08-17-2007, 11:03 PM

It all really depends on the tire brand, tire tread, make of tire, rim, backspacing, leaf spring (mine has HD option), front axle (closed knuckle vs open knuckle)

All these variables will yeild a different result. If you have slight frame rubbing while turning then you can fix that but body rub is a little more of an issue.

vtblazer · 08-19-2007, 07:00 PM

You can usually get away with 33's but as posted above, there are variables.

08-16-2007, 10:55 PM	#1
Lugnutt Registered User Join Date: Jan 2007 Location: San Jose, California Posts: 194	How large of a tire can you mount on a stock 4x4 I have a 72 chev K10 with stock suspension. When I first bought the truck I used to run 12.00x16.6 tires and rims (no height labled back then). They only rubbed a little when backing up with the wheel turned just so (no problem). For the last few years I've been running 31 x 11.50 x 15 with no rubbing at all. What would be the tallest tire I could reasonably assume would fit my stock truck without too much rubbing? Would 32 x 11.50 x 15 be too tall? I know the rim offset has something to do with it also... any spec's on that too? Thanks for your input

08-17-2007, 12:52 AM	#2
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: How large of a tire can you mount on a stock 4x4 32x11.5x15 or I am running 33x10.5x15 on 15x8 rims and it seems fine. Doubt 33x12.5 would work on mine.... Attached Images __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

08-17-2007, 09:24 PM	#3
Batman Registered User Join Date: May 2007 Location: Central IL, USA Posts: 51	Re: How large of a tire can you mount on a stock 4x4 I have 33x12.5R15, no lift and no rubbing. __________________ 1972 GMC K1500 350 V-eight TH350 4x4.

08-17-2007, 09:33 PM	#4
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: How large of a tire can you mount on a stock 4x4 I ran 33's on a 12 inch wide rim on my 69 for awhile before I lifted it,no rubby

08-17-2007, 11:03 PM	#5
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: How large of a tire can you mount on a stock 4x4 It all really depends on the tire brand, tire tread, make of tire, rim, backspacing, leaf spring (mine has HD option), front axle (closed knuckle vs open knuckle) All these variables will yeild a different result. If you have slight frame rubbing while turning then you can fix that but body rub is a little more of an issue. __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

08-19-2007, 07:00 PM	#6
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,538	Re: How large of a tire can you mount on a stock 4x4 You can usually get away with 33's but as posted above, there are variables.



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