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Max Tire Size without Torsion Bar Adjustment or Extended Bump Stops

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Old Mar 9, 2010 | 08:46 AM
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Default Max Tire Size without Torsion Bar Adjustment or Extended Bump Stops

What is the maximum tire size I can run without having to crank the torsion bars or add extended bump stops...

I know some H3's come with 295/75R16's... but what is the max you can go?

Can you do 305/70/r16's or any other size larger then the 295's?
 
Old Mar 9, 2010 | 09:17 AM
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33 inch tires are as big as you want to go. Some guys crank up the T-Bars and go with 35's. Only problem is you start running into problems with breaking stuff when running 35's on the H3.
 
Old Mar 9, 2010 | 09:19 AM
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So 295/75R16's or 305/70R16's?
 
Old Mar 9, 2010 | 12:23 PM
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315/75/16 w/o anything

https://www.hummerforums.com/forum/s...081#post219081


but.... i just purchased the trail duty kit because i want the extra lift.

if you're going to spend over $1K, $209 for the kit is not expensive
 
Old Mar 9, 2010 | 12:26 PM
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I had a problem running Java on my computer so I tried this link:

http://www.discounttire.com/dtcs/infoTireMath.dos

pretty good too
 
Old Mar 9, 2010 | 03:01 PM
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You can install 35" (315/75/16) tires on a H3 with no modifications at all. No lifts, no torsion cranking, no bump stops.
 
Old Mar 9, 2010 | 08:15 PM
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Originally Posted by H3DONIST
You can install 35" (315/75/16) tires on a H3 with no modifications at all. No lifts, no torsion cranking, no bump stops.
Butttt...

Will there be power issues with the I5?
Will I have issues with the dealer if I have mechanical problems... say with the tranny?
Will there be shifting issues with the automatic?
etc...
 
Old Mar 9, 2010 | 08:24 PM
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how much of the H3 will now be invalid if any mechanical issues arise that will not be covered by the warranty with the 35" tires?
 
Old Mar 9, 2010 | 09:21 PM
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That's a good question...

If a dealer wants to be nasty they can deny any drivetrain warranty work based on the tire size being larger than what comes from the factory (285/75R16 max on the Adventure Package).
 
Old Mar 9, 2010 | 09:34 PM
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Call your dealer first. Find out if they are dicks. If they are, then call a different dealer. Any GM dealer will work, since Hummer is going away and GM will still have to cover the warranty.
 



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