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How Large Tires Can I Go With Without A Lift?
Deadhook
post Dec 3 2006, 01:02 PM
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Wondering if anyone knows how big I can go with new tires without needing to lift the truck? It's a 2000 Tahoe LT 5.3 (not z_71).

It's currently sitting on 265/70R - 16's

Thanks!


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blkz71
post Dec 3 2006, 01:03 PM
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smile.gif scott you should get that thread up.


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whiteZ714x4
post Dec 3 2006, 01:10 PM
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QUOTE(Scott @ Dec 3 2006, 12:31 PM) [snapback]109537[/snapback]

That's a hard question w/o some clarifications. It's only good to rev it up like that when it's bone cold, within a few seconds of starting it up. I usually just mash the peddle to the firewall until the truck warms up a bit before taking off with a nice neutral drop. Only takes a minute or two. I know better than to rev it up after it's been warmed up a bit.... biggrin2.gif You're serious? huh.gif

If so, make sure the vehicle is completely warmed up. Dispense with the real high stuff. I'm sure you can get the point across with a couple of quick 3,000 rpm blips. If that's not good enough, call the bozo's bluff next to you and let him firewall his engine to oblivian.



With a tad bit of trimming I think 44 boggers will be just fine for your car. In all honesty, I think 285 will fit.


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rusty24
post Dec 3 2006, 01:53 PM
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My is not a Z71 either. Im running 265/75/16's. There are two areas that may be a problem depending on where your front sits. I had a larger set of keys put in and they were adjusted from there to bring the front up almost 2 inches. If your front sits too low, you may get some rubbing. Plus there is only about an inch between the front air dam and the tire (yellow arrow). Most of my rubbing was in the rear when I turned the wheel.


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06tahoez
post Dec 3 2006, 02:31 PM
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We had 285/75/16s on our Silverado and had no problems with them. These tires were installed on 16" American Racing Pythons.

We ended up selling the wheel/tire setup to our friend for their 2003 Tahoe LT and they fit fine. Had to trim a little bit of the driver side, inside wheel well due to it rubbing during hard turns. Once we trimmed the plastic, everything was fine.... no more rubbing....


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rusty24
post Dec 3 2006, 05:16 PM
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Did you trim after any key adjustment? I was seriously considering on getting some Dueler AT REVO's in a 285/75. Some body said they even make a 80 and 85 series.


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Scott
post Dec 3 2006, 06:07 PM
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285/70/16's - Adjust keys as necessary.

Blk - Remind me??


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blkz71
post Dec 3 2006, 07:13 PM
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how big of tires with X amount of lift and all that thread.


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Scott
post Dec 3 2006, 07:37 PM
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I did make a mini post of that nature not too long ago. However, I thought someone (you maybe??) was going to write something up more formally so we could add it to our FAQ? This might have gotten lost in the scramble. I'll try to find my recent post.


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blkz71
post Dec 3 2006, 09:01 PM
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o gotcha, i never saw but i was gone for a while not to long ago.
I think it should include: Model, year, suspension modifications if any(in detail with specs), tires(details with specs and dimensions), wheels (size and backspacing), rubbing issues if any, any type of trimming or tricks to eliminate rubbing (like flip shock mount bolts), pictures (prefferably of flat ground and articulated), personal opinion, and im sure theres more others would like to.


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Scott
post Dec 4 2006, 12:00 PM
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Would you be willing to help with the raw info, and I'll handle the rest?

Here's the thrust of my last post on the matter:

The stockers are 265/70/17's (31.8").

The first oversize is 285/70/17's (33") which most Z's can handle without touching a thing. You might want to crank up the stock keys.

The second oversize is 295/70/17's (33.5") which will require Ford Keys, perhaps rear spacers and a little trimming

The third oversize is 305/70/17's (34") which will require spacers, Ford Keys adjusted to level, and I would plan on a good amount a trimming.

Anything over that requires Body Lifts and beyond.

Please know that each mfr rounds their spec's so one 295 might be up to 1/2" bigger or smaller than the next guys - so check the actual spec's.


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blkz71
post Dec 4 2006, 02:40 PM
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surely, send me a pm with some specifics of what you want.


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Scott
post Dec 4 2006, 02:49 PM
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Oh, I don't know - perhaps take what I have, add what you posted, and if you got any pics to show examples of each config, that would be great too. When you have all of this raw info, let me know and I'll help put everything together into a nice each to read and download PDF.

Sound good? Thanks man!!


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blkz71
post Dec 4 2006, 04:11 PM
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Stock tires are 265/70/17's (31.8") approx. 10.5" wide.
Stock rims are 17" by 7.5" wide with approx. with 5.75" backspacing??

The first oversize is 285/70/17's (33") approx. 11.5" wide, which most Z's can handle without touching a thing. You might want to crank up the stock keys. New rims can be used, but if they are wider or have less backspacing, they could pose minor rubbing issues. These issues can be generally solved by trimming or torsion bar crank. Any rim over 9 inches wide is not recommended due to rubbing issues.


The second oversize is 295/70/17's (33.5") approx. 11.5" wide, which will require Ford Keys, perhaps rear spacers and a little trimming. As with 285's, different rims will play a role if how much trimming will be needed or perhaps suspension tweaks(more crank, adding rear spacers, etc.).


The third oversize is 305/70/17's (33") approx. 12.5" wide (equivalent to a 33x12.50r17). These will require spacers, Ford Keys adjusted to level, and I would plan on a good amount a trimming. As stated above, different rims will play a role if how much trimming will be needed or perhaps suspension tweaks (more crank, adding rear spacers, etc.). Because 305's are so wide, the gap between the rear wheels and body and other components is extremely close with stock wheels. Under heavy loading or suspension articulation, the rear tires may rub. Flipping the rear-upper shock mount bolts is a good idea, this will eliminate a lot of rubbing. New wheels with a different backspacing or width will help limit the amount of rubbing in the back drastically. Any wheels over 9" wide or less than 4.5" of backspacing will cause rubbing issues in the front, anything else should be fine. A popular tire is the Goodyear MTR, this tire in the 305 is known to be bigger than the typical 305, 34" tall generally. This tire may need more trimming or lift.

The next size up is a 315/70/17 (34.5"-35") approx. 12.5" wide (equivalent to a 35x12.50r17). To clear these tires, the vehicle will require a minimal of a 3" body lift, trimming, and a torsion bar crank would not hurt either(Ford keys would be even better but are not necessary). A 6" suspension lift by itself will clear these tires no problem, minor trimming up front may be required. As stated above, different rims will play a role if how much trimming will be needed or perhaps suspension tweaks(more crank, adding rear spacers, etc.). Because 315's are so wide, the gap between the rear wheels and body and other components is extremely close with stock wheels. Under heavy loading or suspension articulation, the rear tires may rub. Flipping the rear-upper shock mount bolts is a good idea, this will eliminate a lot of rubbing. New wheels with a different backspacing or width will help limit the amount of rubbing in the back drastically. Any wheels over 9" wide or less than 4.5" of backspacing will cause rubbing issues in the front, anything else should be fine. With a body lift, 315's on a 17x9 seem to be a good setup with almost no rubbing with some trimming. Even with a suspenion lift, 10" wide rims have been found to cause rubbing issues up front.

With 37"-38" tall tires ranging from 12.50"-15.50" wide. To clear these huge tires, the vehicle will require a minimal of a 3" body lift and a 6" suspension lift. Even with that much lift, the vehicle may still require some trimming, especially with the wider tires. With 38x15.50's, it is recommended to have a minimal of 10 inches of lift and will still require trimming. With any tire over 13.5" wide, new wheels (wider) will need to be purchased.

All dimensions given are "general" or the "accepted" size of that particular size. Please check the actual heigth and width of the tires you would like as the the actual size varies from manufature to manufacture. Even within the same manufacture, tires will vary by model.

Members: If you would like to share pics of your vehicle/setup(please do), please include: Suspension modifications in detail, any trimming done, type and size of tire, wheels with specs., any other tricks done to accomodate the setup, pics (prefferably on flat ground and flexed if possible), and thoughts and opinions, thanks.

Scott-I was going to post pictures of various setups, but i did not want to use anyones pictures. I will post one of my set up however, im sure everyone will post up. Let me know if theres anything else that you would like.


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Scott
post Dec 4 2006, 04:23 PM
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Very nice - Let see what other contributions and additions we can get. Thx!


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blkz71
post Dec 4 2006, 04:24 PM
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Example of 35's (315's) with a body lift and ford torsion bar keys. Tires are pro comp xtreme AT's 35x 12.50's and helo maxx 6 wheels 17x9's (4.5" backspacing). Trimmed parts of front wheel wells, air dam, and rocker panels. Also flipped rear shock mount bolts, no rubbing unless under extreme articulation.

This post has been edited by blkz71: Dec 4 2006, 04:27 PM
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rounderk5
post Dec 4 2006, 05:22 PM
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preface: Scott, please feel free to admin this post if you feel it should go somewhere else.

So, what about different rim size combinations, like 305/50/20's? Or is that best left somewhere else?

Also, something to possibly add to this thread that might help the tire "ignorants" like me, is, what exactly do the numbers mean...I know xx/xx/20 the 20 is rim size, but what does the 305/50 mean? In other words, if I am looking for a wider stance/tire where do I want to look? (at the 305 or the 50?)

If that makes sense.


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RICK'S
post Dec 4 2006, 05:49 PM
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No one ever talks about 275-70-17 I know goodyear MTR make's this size


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blkz71
post Dec 4 2006, 07:16 PM
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Well those are just the basics (i think thats what scott wanted for starters), i was thinking other people would share their knowledge, like jennabear, she has the setup you referred to.
QUOTE
No one ever talks about 275-70-17 I know goodyear MTR make's this size

I Have no clue about that tire, post up info. you have about that size.


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RICK'S
post Dec 4 2006, 08:10 PM
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MTR Goodyear listed 32.4 @ 11.0 width - 275/70/17


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