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Tire & Wheel Size

Discussion in 'Commercial Snow Removal' started by Chris-R, Sep 3, 2005.

  1. Chris-R

    Chris-R Senior Member
    Messages: 321

    I own a 2005 GMC Sierra 2500HD work truck which has 16 X 6.5 gray steel wheels. The stock tires are LT245/75R/16. I want to upgrade to some Cooper Discoverer ATR LT265/75R/16 tires. If you look at the Cooper website, it says you need at least 16 X 7 inch wheels for that tire size which means I would have to buy new wheels. I don't want to buy wheels if I don't have to but I also don't want to do something stupid by being penny wise and pound foolish. I went to one Cooper dealer who agreed with the web site so they said I needed at least 16 X 7 inch wheels. I went to another Cooper dealer who told me that my current 16 X 6.5 inch wheels were fine and there would be no problem at all with mounting the 265's on my current 16 X 6.5 wheels. Can anyone comment pro and con here? I'm not sure what to do. Thanks.
  2. echovalley

    echovalley Senior Member
    from CT
    Messages: 456

    i had 285s on my 01 2500hd,cranked up the bars and it was fine
  3. gino

    gino Member
    from Maine
    Messages: 94

    I am pretty sure that if you change your wheel size, then the antilock brakes will not work:(
  4. echovalley

    echovalley Senior Member
    from CT
    Messages: 456

    first time i every heard that one.what does the tire size have to do with how much pedal pressure you apply?just FYI the 05s HD now comes standard with the 265s
  5. Chris-R

    Chris-R Senior Member
    Messages: 321

    I don't think I made myself clear and apologize for that. What I want to know is what you think about mounting a 265 tire on a 6.5 inch wide wheel when Cooper Tire says the wheel should be at least 7 inches wide. I am wondering how that will affect tire safety, tire wear, strength, load range, gas mileage, etc. I find it odd that one dealer says this is perfectly fine to do while another says no. BTW, the tire dealer who said there is no problem mounting a 265 tire on a 6.5 inch wheel is a very reputable dealer. I have bought wheels and tires from them before with nothing but good results. This, of course, is the root of my quandary.
  6. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    I have LT262 75 R16 tires on 2 of my GMC trucks right now that have the factory 6.5 rims on them. I have had no problems to date with them....
  7. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Try another dealer that does not sell wheels and see what they say. I would think they would have a chart to tell what size tire needs what size rim. It's not that big a change from stock width of the tires 78 vers 75.
  8. PlowKid

    PlowKid Junior Member
    Messages: 12

    I have seen guys running 305s on the stock rims before. It looked funny and the tires will probably wear poorly though. 265s will be fine. I have them on my truck and have no problems whatsoever. 285s will even be fine.

    JRKRACE Senior Member
    Messages: 172

    I've done it and have had no problems...If you go bigger. say to a 285 tire, I would buy rims then..