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I have a 06 Colorado 4x4 z71 and i was wondering what is the max size of a tire i could fit on it stock? It has a 265/75/r15 right now.
 

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Est. 1992
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for no rubbing at all, 31x10.5x15 thats on z71 wheels, the offset on those wheels won't allow 32x11.5 without rubbing on the sway bar, and for a 15'' wheel there is no 32x10.5, otherwise you could squeeze that in there
 

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It's also going to depend on what modifications you are willing to do for whatever tire size. Are you going to body lift it? Suspension lift it? Level it out? Most common is to level it out and you generally have no issues with a tired 32" or less, but possible rubbing the sway bars or body mounts. The width of the tire and the rim choice combined are what contribute to rubbing.

I have a Z85 with 1.5" shackles in the rear and level and fit 265/75-16 with 7" of fender clearance and the wheel offset is perfect for no rubbing. Before I raised it 1.5" the tires looked to be crammed under the fenders which just looks bad (to me). A z71 is taller, but maybe not enough to make a difference to fit the same size tire without modifications.
 

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Nipple
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a 265/75R15 IS a 31x10.5R15
I thought that's basically said... or at least how I interpreted it. :shrug:

But anyways, yeah, max would probably be 31x10.50 on stock wheels and no suspension adjustments with NO rubbing. 32x11.50s will only rub on swaybar on full lock with same set-up as previously stated. :thumbup:
 

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Est. 1992
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a 265/75R15 IS a 31x10.5R15
Right I never said it wasn't, I didn't make my answer clear enough, if he wants bigger tires he most likely wants a/t or m/t which 90% Will be in the 31x10.5 category if you search 265/75 you will see mostly highway tire
 

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I'm running 265/70 R17's on my 06 Z71. They are the same diameter and width as the 275/65 15'. Unfortunately I bought a set of rims from a "Respected" company and they turned out to be complete junk. Chrome is peeling after only 2 years (and yea i cleaned and polished them like i told the company when i called for them to tell me it was my fault :ugh: ) But The Nitto Terra Grapplers i just put on have a Great Ride to them :D
 

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The two tires really aren't very close in size. The first number you listed is the width. 265mm and 275mm. The 275 is about 0.4" wider, or nearly 1/4" on the inside and the outside. That sounds insignificant, however if you are closer than a 1/4" to rubbing, bam, the new tire will rub. Not only that, the 275 tire you listed is actually 2.5" taller than the 265 tire.

265/70-17 = 10.4" wide, 31.6" tall
275/65-15 = 10.8" wide, 29.1" tall

The tire size the OP wants to run
265/75-15=10.4"wide, 30.6" tall
 

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Dont let the Nation die
2005 GMC Canyon z71 SLE 4x4 3.5L
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I Vanquish Boredom
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I ran 265/75R16 (~32x10.5) and had them on for a few weeks before I did my lift...they rubbed though, but if I had wheels that tucked a bit more they might not have...betting they would have though...my truck is a 2005. I did some trimming and ran them fine on the street for a few weeks no problem, but they rubbed bad when wheeling. Even with 2.5" crank on the TB's I can still make them rub, but only when wheeling and even then they won't 99.5% of the time.
 

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I ran 265/75R16 (~32x10.5) and had them on for a few weeks before I did my lift...they rubbed though, but if I had wheels that tucked a bit more they might not have...betting they would have though...my truck is a 2005. I did some trimming and ran them fine on the street for a few weeks no problem, but they rubbed bad when wheeling. Even with 2.5" crank on the TB's I can still make them rub, but only when wheeling and even then they won't 99.5% of the time.

He has 15" z71s though
 

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I saw...but I can rub 32x10.5's even while lifted and having trimmed. Could find slightly better offset wheels but he won't be able to run anything larger than 31" likely unless he wants to trim some. Maybe a 32x9.5 but I've never looked for that size. 32x10.5's are really the next size up from 31x10.5's, and steelies are cheap...just making sure the OP knows all available options. My 265/75R16's are mud tires though so the tread blocks are fairly chunky/deep...an all terrain in that size might be doable on the street at factory height with minor trimming and the right wheel offset, but if the OP goes wheeling he's going to rub with 32's.
 

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With a 2" torsion bar crank, the OP could run 33X10.5X15 with no rubbing issues.
 

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Only with the right offset on his wheels...and I'm willing to bet 33x10.5's would rub if he wheels his truck...no rubbing while driving on the road is one thing...ro rubbing under any circumstances is quite another...not trying to be argumentative, just pointing it out as it is the OP's first post and he may want tires that can't rub under any circumstances, wheeling or not. I can get both my sets to rub one way or another...not bad enough for me to care, but some would.
 

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Nipple
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I'm running 265/70 R17's on my 06 Z71. They are the same diameter and width as the 275/65 15'. Unfortunately I bought a set of rims from a "Respected" company and they turned out to be complete junk. Chrome is peeling after only 2 years (and yea i cleaned and polished them like i told the company when i called for them to tell me it was my fault :ugh: ) But The Nitto Terra Grapplers i just put on have a Great Ride to them :D
You have any pictures ? I want bigger wheels and tires without rubbing or trimming
 
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