Offroad Trailblazers and Envoys

Lift/Tire Size Chart

Need new shoes? This is the place to discuss.

by navigator » Tue Aug 09, 2011 1:15 pm

SizeHeightWidthSpacer2in4in6intrimBuild Thread/Owner
33/12.50/153312.5YYYYYirishboy02
42/15/154215Y****ChevyCrew
245/70/1629.59.65NNNNNSaltWaterDrinker,Akozlowski,Doratus
245/75/1630.469.65NNNNNJolly01,EwingJK
255/70/1630.0610.04NNNNN
255/85/1633.0710.04YYYNNbattlemode
265/70/1630.6110.43?NNNNdjthumper,HOTRODSURFER
265/75/1631.6510.43YYNNNConradM,Nakashige,Navigator,Steveroche,06MidnightBlue,tbangert,Me007gold ,Blackout,bustedblazer,Philberto
275/70/1631.1610.83YYNN?
285/70/1631.7111.22YYNNY
285/75/1632.8311.22YYYNYThe Roadie,teebes,wink,janesy86,Gordinho80,mikek3363,SteveTB03,JCrayton99,Flying Monkey,foosh
SizeHeightWidthSpacer2in4in6intrimBuild Thread/Owner
245/65/1729.539.65NNNNNCody_S,cbbryan
245/70/1730.59.65NNNNNbartonmd,graverobber
245/75/1731.479.65YYNNN
255/70/1731.0610.04YYNNN
255/75/1732.0610.04YYNN?JameDowning,MrSmithsTB,galacticfuzz,BSalty,Dizzlenator,dirtychevymama
265/65/1730.5610.43?NNNN
265/70/1731.6110.43YYNNNStoked,Zero,middlegriff1,cowboy63645,Saxis,KE7WOX,Mooseknuckle,Diacom
275/65/1731.0710.83YNNNN
275/70/1732.1610.83YYNN?Djones,Karo,Decembersend
285/70/1732.7111.22YYYNY05ls_soldier,Regulator1175
285/75/1733.8311.22YYYNY
305/65/1732.6112.01YYYNY
33/12.5/173312.5YYYNYdirty anton
305/70/1733.8112.01YYYNY
315/70/1734.3612.4YYYYYmikepeters1983,mikekey
35/12.50/173512.5YYYYYJamesDub,fishsticks,HARDTRAILZ
37/13.5/173713.5*****DirtyAnton
295/70/1834.2511.61YYYYYRob93
285/50/2031.2211.22YYNNYFlyingfischer5


Legend
spacer - wheel spacers or larger offset wheels needed to clear upper ball joint.
2in -2+ inches of lift from body or suspension lift or mixture of springs/spacers etc.
4in - 4+ inches of lift from usually from body and suspension lift or mixture of springs/spacers etc.
6in - 6+ inches of lift from suspension lift, body lift, upgraded springs and sometimes upgraded control arms, panhard bars etc.

trim - indicates trimming may be required.
build thread - some who has a similar setup to the one listed.
Y - means recommended or required.
N - means not needed.
? - means borderline some folks can get by, others can't.

******** it is not recommended that you run anything over 32" tires on 3.42 gears************
For more information on gearing you can search and also use the Gear Ratio calculator at the following link
Gear Ratio Calculator


Things I did not put in the chart are references to stiffer springs or Mark's taller suspension and body lifts.
A few assumptions were....
265+ may need fender liner trimming
285+ will need fender liner trimming and likely needs metal trimming.
30.6 needs a wheel spacer
31+ needs 2 inch lift+
32.5 + needs 4 inch lift+.
34+ needed 6 inch lift+
anything over 35 needs some extreme work and possibly a SAS.
***************************************************************************
Keep in mind the Envoy has a little different design so tire sizes at the upper end of each lift slot may require additional lift/trimming.
***************************************************************************
I know there are some exceptions but I just want to post some general rule and err on the conservative side.

What I think is most helpful is the build threads for each tire size. I looked for build threads that matched the tire size and not specifically the lift combo.

Please feel free PM me any updates and I will update the first thread to keep it as accurate as possible.
Also if you are running a build for a tire size listed that doesn't have an entry let me know and I'll update.
Ideally we would have at least one build for each tire size/lift combo.

Special thanks to James for helping get the tables all set up and for everyone else who contributes and all the build threads, it wouldn't be much help without the build threads.
Last edited by navigator on Tue Oct 25, 2011 1:48 pm, edited 29 times in total.
"Please consider a search before posting. Folks on this site PIONEERED functional offroad use of these trucks."
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by Stoked » Tue Aug 09, 2011 2:45 pm

Nice Job on the research! :thumright:
Last edited by Trail X on Wed Aug 10, 2011 8:52 am, edited 1 time in total.
Reason: cleaned
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by djthumper » Tue Aug 09, 2011 3:22 pm

Nice work on the chart.

Maybe put the person's name with the build thread. My 265/70R16s measured out to 30.7" for the Yokohama's and so did the Falkens I was looking at. So I don't know how we can note that either.
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by navigator » Tue Aug 09, 2011 3:36 pm

I know we don't get a lot of the repetitive fitment questions here that they get on the OS and maybe something like this will help as we on-board new members. I might post something similar on the OS without the build threads once it is more refined. I knew I could get good, controlled feedback here.

djthumper, I'll see if I can fit the person's name and keep it all lined up well. I wanted to make the chart slim so it would fit in the screen width but it would be nice to quickly browse what everyone is running.
Last edited by Trail X on Wed Aug 10, 2011 8:53 am, edited 1 time in total.
Reason: cleaned
"Please consider a search before posting. Folks on this site PIONEERED functional offroad use of these trucks."
The answer to many common lift questions can be found
here
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by djthumper » Tue Aug 09, 2011 8:08 pm

Now that looks like it is going to work out nicely.
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by navigator » Tue Aug 09, 2011 11:06 pm

ok, added names and a few more build threads. I'll work on adding links to the other builds as I get time.
I'm listing the ones without tire sizes at the bottom just so I know I have reviewed their threads because scrolling through a full thread looking for a tire size can be time consuming to do more than once.
If anyone listed updates their tire size PM me and then I'll move you to the appropriate slot. Once complete I'll remove the listings with no sizes.
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by fishsticks » Wed Aug 10, 2011 2:24 am

Hey nice table.

For reference, I'm running 35x12.5x17s now. All things required that you have listed, plus rear control arms to avoid rubbing in the rear. Rubbing the firewall is an occasional issue in the front , even at a bit over 7 inches of total lift. I need to re-shorten my sliders by another inch (total of 3" shortened on the 78" variety).

I'm way behind on my build thread. :oops:
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by navigator » Wed Aug 10, 2011 8:10 am

thanks Donny, I had thought about adding another column for 6inches + for the few super-hard core guys.
I might do that the next time I make an edit. I would hope even the casual observer would know that to run 35's you need more than 4 inches of lift. Then again I guess if you are new then there is a lot to learn. Hopefully they will check out the build threads to get more info.
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by Trail X » Wed Aug 10, 2011 8:51 am

I played with the table styling some to make it blend a little better with the site and cleaned up the 'table' discussion from this thread.

Chris, thanks for putting in the effort to make this a good resource. I'm stickying the thread. :thumright:
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by Gordinho80 » Wed Aug 10, 2011 9:08 am

Nice work! Thanks for taking the time to put it together.
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by HARDTRAILZ » Wed Aug 10, 2011 4:44 pm

I can run 35 12.50 15 with my setup as well, have run a set of 36's onroad without rubbing, 325-60-20, but likely wouldnt work offroad. There should be some info from when I ran 34-10.5-17 Swampers as well. Might help for people looking at oddball sizes.
I hate to advocate weird chemicals, alcohol, violence or insanity to anyone...but
they've always worked for me.
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by DmccartneyFF2TB » Wed Aug 10, 2011 9:21 pm

Thats cool haha.
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by navigator » Wed Aug 10, 2011 11:06 pm

ok, I have move Donny and Kyle though I am unsure what to do for the sizes that Kyle has run but is not currently running.
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by Trail X » Thu Aug 11, 2011 8:36 am

I'd just put their max working sizes.
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by navigator » Thu Aug 11, 2011 9:08 am

ok, Kyle said he didn't think he could wheel the 36's and we aren't really trying to help the show poodles so we'll leave it at 35's. Dang, I need to go to one of the bigger meets just so I can see a TB on 35's!
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by The Roadie » Thu Aug 11, 2011 9:34 am

I would put in an entry for chevycrew and the 42's, with a double asterisk for a double axle swap and leafs.
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by navigator » Thu Aug 11, 2011 10:24 am

good point, I would have had a hard time squeezing him into one of the slots we currently have. I'll just have to make an entry for "Baddest TB ever built" :-)
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by Saxis » Thu Aug 11, 2011 11:23 am

As far as "exceptions" go, it seems that Envoys have a little less fender room and usually need more trimming. At my lift/tire size, most TBs haven't needed trimming, whereas I had to remove a couple inches of liner at least.
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by navigator » Fri Aug 12, 2011 8:15 am

thanks Saxis, I added a comment to the main thread. I also added ChevyCrew's build and a few other ones as well.
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by Nakashige » Fri Aug 12, 2011 11:22 pm

My tires im running come out at 32.2” They are the guard dog retreads
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