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2005 GMC what size tire can I fit

This is a discussion on 2005 GMC what size tire can I fit within the Exterior Tech forums, part of the General Discussion category; Bigger Tires What size????????????/ I have a 2005 GMC 2500HD that I'm going to new tires and rims on. What ...

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    2005 GMC what size tire can I fit


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    Bigger Tires What size????????????/
    I have a 2005 GMC 2500HD that I'm going to new tires and rims on. What bigger size can I put on without a lift kit. I'm thinking 16" 17" or maybe 18" if they fit. But I don't want the low sidewall look . What about the speedometer can the dealer recalierate it?

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    Re: 2005 GMC what size tire can I fit

    i have an 03 2500hd stock height.....i have 285/75/16s on it only thing i had to do was trim the plastic on the bottom of the front bumper...and if you want nothing else then a straight change in odometer/speedo.....u can buy a regular programmer that does just tire size

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    In Valor There Is Hope WildChevys's Avatar
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    Re: 2005 GMC what size tire can I fit

    you can fit whatever wheel size you want. as for tires if you trim and crank you can fit 35's. i think it would look best leveled with 35's and 20's IMO


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    Re: 2005 GMC what size tire can I fit

    Quote Originally Posted by WildChevys View Post
    you can fit whatever wheel size you want. as for tires if you trim and crank you can fit 35's. i think it would look best leveled with 35's and 20's IMO
    It takes SERIOUS trimming and cranking to fit 35's under an HD.; I run 305/65R17 (33x12.5) on H2 wheels on my 03 and they rub on the plastic fender liner.

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    Re: 2005 GMC what size tire can I fit

    heres 285/75/16 on an 05 Chevy 2500HD. It needed some slight trimming and cranked level.

    Formerly 6.0 BOWTIE HD
    2004 GMC 2500HD LB7
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    Re: 2005 GMC what size tire can I fit

    Quote Originally Posted by Diesel Dan LB7 View Post
    It takes SERIOUS trimming and cranking to fit 35's under an HD.; I run 305/65R17 (33x12.5) on H2 wheels on my 03 and they rub on the plastic fender liner.
    if you do it on stock wheels it can be done, without SERIOUS trimming. H2 wheels are wider.


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    Re: 2005 GMC what size tire can I fit

    Quote Originally Posted by WildChevys View Post
    if you do it on stock wheels it can be done, without SERIOUS trimming. H2 wheels are wider.
    Putting anything bigger than a 265 on PYO's is asking for trouble., I used to run 285/75R16 on mine and it fried the center of the tread. Also, cranking the front end enough to fit 35's will result in toasted ball joints, wear of idler and pitman arms, tie rod ends, and tie rod breakage

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    Re: 2005 GMC what size tire can I fit

    every truck sits differently. some trucks can crank 2.5" and still have decent angles. you can crank 2.5" without any problems. with slight trimming and stock wheels it can be done. there are several people here that have done it without any problems.


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    Re: 2005 GMC what size tire can I fit

    Quote Originally Posted by WildChevys View Post
    every truck sits differently. some trucks can crank 2.5" and still have decent angles. you can crank 2.5" without any problems. with slight trimming and stock wheels it can be done. there are several people here that have done it without any problems.
    yes you can crank it, but it will ride like chit, and the angles will be chit. You need a 4" lift for 35's When you add big tires + chitty suspension angles + heavy truck + power = snap. Cranking that far would make 4x4 essentially useless, as the CV's would bind under power, and vibrate the rest of the time.

    I don't see the point in having a big 'ol 4x4 that can't use 4x4 without turning the front end into spaghetti

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    Re: 2005 GMC what size tire can I fit

    2.5" is not over cranking the CV's. i WOULD NOT go above 2.5". but 2.5 is still safe. Guys are running 37's with 6" lifts on aftermarket wheels. again you need stock wheels to properly clear the tires, with aftermarket wheels it will be VERY difficult. And with aftermarket wheels yes you will want more than just crank.


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    Re: 2005 GMC what size tire can I fit

    Thanks Guys for the replys. If I put 265 on it and crank it how will it ride and what about changing the speedo?

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    Re: 2005 GMC what size tire can I fit

    Quote Originally Posted by cletrac View Post
    Thanks Guys for the replys. If I put 265 on it and crank it how will it ride and what about changing the speedo?
    if you go with 265/75R16's you won't need to crank or change the speedo.

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    Re: 2005 GMC what size tire can I fit

    The speedo may be one or two mph max. Mines off by about 5 mph on 285/75/16.

    Formerly 6.0 BOWTIE HD
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    2005 Chevy 2500HD 6.0-sold 7/31/13
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    Re: 2005 GMC what size tire can I fit

    Will 285s fit on a stock rim ,if so what air pressure shoud you have?

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    Re: 2005 GMC what size tire can I fit

    Mines on 285s on stock rims. The pressure is a little softer than the max but it gives me a nice full foot print. Also mine are load range "E" rated for heavier weight. Since it is a 3/4 ton and used as such. I don't remember exact pressure numbers. 305 can fit on the stock rim but not suggested they balloon out the side wall so much it's crazy. I don't recommend cranking to the max to squeeze 35s your asking for trouble. I cranked 2 rounds and have never had any front end trouble so far. It's been about 45000 miles on it.

    Formerly 6.0 BOWTIE HD
    2004 GMC 2500HD LB7
    2005 Chevy 2500HD 6.0-sold 7/31/13
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    Re: 2005 GMC what size tire can I fit

    Quote Originally Posted by cletrac View Post
    Will 285s fit on a stock rim ,if so what air pressure shoud you have?
    VERY easily


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