What's the weight difference between the 20" factory rims and the 18" police rims?

Discussion in 'Generation 4 - General Discusson' started by CCXVI, Apr 16, 2019.

  1. CCXVI

    CCXVI Member

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    Going from the tires for the 20's to the tires for the 18's is a 14# increase, and I'm curious how much more the steel wheels weigh, or if it's less because they're smaller.
     
  2. xFallenxCripplex

    xFallenxCripplex SHO Member

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    Just by feel I think they are about the same
    But I did find weights of some tires and found that every inch is about a pound difference

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  3. Poppa Diezal

    Poppa Diezal Member

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    I wonder it I'm not racing it and just want a smooth ride if going to the PI wheels would be better. Even other alloy wheels 19' would be weight reduction and more cushion.
    Anyone try that?

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  4. CCXVI

    CCXVI Member

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    That's part of why I'm doing it. More sidewall always means a softer ride, and often it'll be better at a drag strip because the sidewall can flex instead of the tire spinning, but it'll be less responsive handling wise.
     
  5. CCXVI

    CCXVI Member

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    You can find the exact weight of a tire from the manufacturer. My current tires are 30#, and the new ones are 44# a piece. If the manufacturer website doesn't list them, tirerack always does.
     
  6. Lostneye

    Lostneye SHO Member

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    I haven't weighed them but a few people have said the stock 20s are over 30lbs each. My 20x9.5 TSWs are 26.5 lbs each. The tires weight a little more as I went to 275s but still a net reduction I would guess the PI wheels being steel are not much lighter. Differences in unsprung and rotational weight are said to make a difference but I haven't noticed a difference.
     
  7. Johnbigdog

    Johnbigdog SHO Member

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    Yes, I will agree there is a noticable ride difference between my 18 inch snow and the factory flowers. Much less road feel with the 18s.
     
  8. xFallenxCripplex

    xFallenxCripplex SHO Member

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    Tire rack does not always. i still had to hunt thru but it was easier going thru tire rack. Since even same brands did not list all weights.

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  9. PaulTAutoX

    PaulTAutoX Member

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    With similar construction and tire width, you almost always gain weight with larger diameter wheels. You have to be careful because often the larger wheels are also wider and with wider tires, so that adds even more. Going from steel to aluminum at the same size usually saves weight, but again look at widths. And run flats weigh more than the similar tire non-run flat.

    Depending on who you believe, saving wheel+tire weight is the same per pound as saving three to ten pounds of weight off of the rest of the car, since there's rotating mass to be accelerated in addition to the basic poundage. Then times 4 for all wheels. Lighter wheels will also be easier to control by the shocks and will give a better ride and/or better ability to keep the tire on the ground, depending on whether the shocks are changed.

    The cars with 20's, I don't understand how they don't get dented rims all of the time. The sidewalls are so short it blows my mind. I had a pothole take out two tires a while back. Police rims aren't 20's because the looks do not matter and the resistance to puncture and tire replacement cost are better over the car lifetime.

    Going to a higher performance tire, no matter rim size, will keep you in the hunt, though that will also result in worse ride quality and maybe force you to have a set of snows, since the stickiest max- or extreme-performance class tires aren't able to function in freezing temps (actually can break down in low temperatures).
     
  10. rubydist

    rubydist SHO Master Staff Member Super Moderators

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    44 pounds for the tire is stupid. a 275/35-20 should be in the 27-30 range. a 44 pound tire will bounce all over the road on that car. if that weight is accurate, you will not be a happy camper.
     
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  11. CCXVI

    CCXVI Member

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    I think you misread, 44# is for the new tire. It's LT255/55R18. I work in tire manufacturing, I've got the tire side figured out, the wheels are the only part I was curious about. I just read that you can fit a 17" wheel though, so if that's true that'd be far better.
     
  12. Lostneye

    Lostneye SHO Member

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    That is still quite heavy for that size. I'm guessing a true Light Truck tire based on the size listing you provided might be the issue. My 275/40R20s are listed as 31lbs and a quick search at tire rack shows most 255/55R18s around that 30lb range. You will feel that.
     
  13. CCXVI

    CCXVI Member

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    I guess I'm just used to tires being heavy, 44 doesn't sound like a lot to me. The tires I just put on my truck are 87# each. I did order a 17" steelie to see if I can fit it.
     

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