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Discussion Starter #1
Hey there

I recently purchased my first truck. A 2004 GMC Sierra Crew Cab, Z71. I belive the tires on it now are 265/60r/17...or somewheres close to that :)

I was just wondering what the biggest size tire I could put on this truck without any mods, and without any problems, except for the expected speedo issue.

Thanks for your help!
 

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I have 285/75'/16's on my 00 Seirra I think the 285/70's are pretty much the same size diameter wise and I have no lift mods at present.
 

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i have an 06 sierra with 285/70/17's with a 3 inch lift and they still have minor rubbing in reverse at full turn, nothing serious, the gmc bumper is fatter than a chevy so with gmc's it will rub if its stock, i think the chevy's can pull it off with no lift but not the gmc
 

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goin with final day and sayin you should be able to fit a 285/70/17 no problem
 
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