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Thread: Rim size/offset

  1. #1
    Jr. Apprentice
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    Feb 2009
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    Edmonton, Alberta
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    Default Rim size/offset

    Can someone please explain to me how you figure out rim size and about offsets negative/positve. I've got a 07 Sierra 1/2 ton with 275/55 20. So If I wanted to put 285/55 20 tires on what size rim would that be? And if i wanted my wheels to stick out a bit, how would I do that.

  2. #2

    Default

    the 285/55/20 is less than 1/2 inch taller than your current tire and only 3/8 of an inch wider, if you have factory rims the offset is positive 31mm so if you go to a rim with say 20 mm positive offset the tire would stick out around maybe 1/2 inch more at most, which doesn't seem like very much but visually it will make a big difference, hope this helps.


    check this post out, it's pretty good:


    http://www.gmtruckclub.com/forum/showthread.php?t=19213
    Adam


  3. #3
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    Default

    So, if I want to make my tires stick out more without changing my rims, how would I accomplish this.

  4. #4

    Thumbs up

    Quote Originally Posted by lordfrosty View Post
    Can someone please explain to me how you figure out rim size and about offsets negative/positve. I've got a 07 Sierra 1/2 ton with 275/55 20. So If I wanted to put 285/55 20 tires on what size rim would that be? And if i wanted my wheels to stick out a bit, how would I do that.

    Here, try this website http://www.wheelsmaster.com/rt_specs...9&text1=&text2=

    It lets you play around with different tire sizes and offsets and gives a pretty descriptive detail about what will and will not fit. The current setting on the page are from my truck but you can play around with them and get a good idea of what kind of clearances and measurements are going to look like.

  5. #5
    Jr. Apprentice
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    Feb 2009
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    Default

    Thanks, thats a helpful website. So, the greater the offset the more the tire will stick out (is that correct). Is there something i can do to make my tires/rims stick out more without changing them.

  6. #6

    Default

    The more the negative offset the more the tire/whell will stick out. Also, take this into account that the more the wheel/tire moves outward the closer it will bring it to hitting or rubbing on the fenders when the wheels are turned left or right.

  7. #7

    Default offset

    I am having the same problem with my truck. I want to change my wheels but the wheels I want have a negative 25 offset which means they will stick out about 3 1/4", so I would need to do a body lift of maybe 3"s. But the greater the NEGATIVE offset of the wheel the further it will stick out, I do know that much. But maybe you can get away with adding spacers to your existing wheels and the wheel push them out a little bit and give you that aggresive truck look we are lookin for. Drew and Adam are 110% righyt in their statements...I love this site.
    08 Silverado
    crew cab
    5.3 L
    LT1 Z71
    Black on Black Leather
    Much Much more to come...
    soon as I get more $$$:money:

  8. #8

    Default help i dont know what iam doing

    Quote Originally Posted by lordfrosty View Post
    Can someone please explain to me how you figure out rim size and about offsets negative/positve. I've got a 07 Sierra 1/2 ton with 275/55 20. So If I wanted to put 285/55 20 tires on what size rim would that be? And if i wanted my wheels to stick out a bit, how would I do that.
    my friend has a 55 chevy he is selling the rims will they fit my 94 gm 1500

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