Larger tires for truck

Discussion in 'Lawn Mowing' started by Barkleymut, Jan 27, 2001.

  1. Barkleymut

    Barkleymut LawnSite Bronze Member
    Posts: 1,117

    I have a 98 Ram 1500 that I love except that it has always looked kind of wussy because it had 225/75 R16 tires. Recently while shopping the local trading post paper I saw a guy who had rims + tires that he had taken off of a 96 Ram 1500. The tires are 245/75 R16. They do make the truck look better but they sure do make a lot of noise. Also I realize they will make my speedometer/odometer run at about 90% of what it actually should. Is there a way I can have the speedometer/odometer modified to acurately reflect the true mileage? Any thing else I should look out for? By the way the rims/tires are Kelly/Springfield and they came with the standard rims, have 75-80% of tread left and only cost me $85 for all 4.
  2. Good deal. It's nice to have a complete set of extra wheels and tires up north so you can switch from snow tires to highway tread.

    Now about the odometer how much taller is the 225 vs. 245?

    [Edited by lawrence stone on 01-27-2001 at 08:39 AM]
  3. Greenkeepers

    Greenkeepers LawnSite Senior Member
    from NE Ohio
    Posts: 695

    I have a 99 2500 that I just put BFG 265's on to try to fill up the wheel wells a little. It looks alot better. My dad has a 1500 that he put the 265's on as well and it looks fine and rides really good w/ minimal noise. I think he said that his speedometer was off about 2mph's so no big deal.
  4. Barkleymut

    Barkleymut LawnSite Bronze Member
    Posts: 1,117

    Stone, I know what your getting at with the height of the wheels but wouldn't the circumference be the only issue? Anyways the tires are just minimally taller. And Greenkeepers, how can he tell that they are off by just 2 mph, and wouldn't that be proportional to the speed you are travelling? If the tire is 10% bigger then wouldn't the speedometer/odometer reflect 10% less than actual? Am I going insane and in my own little world?
  5. BCLawncare

    BCLawncare LawnSite Member
    Posts: 26

    barkleymut, all you have to do is go to your local dodge dealer and tell them what size tires you have and order a new speedometer gear for the transmission to get your read rite for the tires you have. my dodge 2500 has 255/85 tires tall & skinny i love em
  6. Premo Services

    Premo Services LawnSite Bronze Member
    Posts: 1,516

    The tires that you have are probaly hard tread tires,to get less noise you would need a radial tire that has a soft tread. The hard tread tires get more miles on them before wearing out and are quite noisy, and the soft tread tires are much more quiet but wear out faster. I had the hard tread tires on my truck and the noise was unbearable and as they wore out the noise got worse,also when less tread was on them I didn`t get the traction as with soft tread tires.As for the size of tire it does change the mph,mine were 15 inch tires instead of 16 inch tires so I had my wife follow me and she told me when I was going 60 mph, the speedometer said 65 so I drove 5 miles per hr. faster until I got sick of the noise and bought new soft tread tiresthat were the right size for my truck.
  7. nlminc

    nlminc LawnSite Bronze Member
    from GA
    Posts: 1,671

    I was told not to change the tire or wheel size (from factory)at two different shops because it would screw up the ABS and 4x4 on the truck.

  8. thelawnguy

    thelawnguy LawnSite Silver Member
    Posts: 2,412

    It wont affect the abs on a Dodge, unlike the GM products with a separate box behind the glovebox.

    Most Dodges I have seen, the speedos already read high so taller tires will most likely bring it closer in line with reality.

    I went from 245/75 to 235/85, 2 inch taller, and the clock still runs 3 mph fast at a indicated 60. Per radar a la police dept.
  9. KirbysLawn

    KirbysLawn Millenium Member
    Posts: 3,486

    My truck has 265/75/16's, I'm going with 295/75/16's next time to fill wheel well space. I've spoke to several folks who have done this and they say it's a better ride. Here are a few links with information about getting larger tires. The first one shows you how much your speedodmeter will be off.

    Remember, if you change tire sizes make sure you get the speedometer calabrated.
  10. John DiMartino

    John DiMartino LawnSite Silver Member
    Posts: 2,555

    My Dodge camewith 245/75R16 E range Michelins,I put 285/75/16 BFG all terrains on the stock rims,they looked perfect for the truck,they were 32.7" tall,and that wheelwell is huge,so they dont even look that big on the truck.I think 245/75R16 is 29.6" tall average height.265/75/r!6's are 30.6",225/75R16 are 28.7.Sizes vary,but these are real close with new tires,and full tread.

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