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11-16-2014, 05:15 PM | #1 |
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How to check "roundness" of wheels?
I think I have posted on this problem before but still have not solved my problem. Sorry about a repost.
But my problem is that with my 29 coupe when it goes down the road at low speed ( 15 to 25 MPH) it seems to "bounce" up and down. It doesn't "waddle" back and forth like a duck but rather seems to go up and down. I have about 8 or 9 21" wheels around here and am trying to find which ones are "round". That is one that would not cause a rig to "bounce" up and down. I tried various methods, putting them on a hub and rotating then and trying to measure how much they go up and down when having them close to the floor, and other measurement methods. But so far have not found a good way to measure the roundness of a wheel either with or without a tire on it. Does anyone have any good ideas on how to check a wheel either with or without a tire on it or is there some kind of tool to check this? I could have the possibility that one of my tires has a high spot on it. But they are almost brand new Firestone tires and find this hard to believe, but-----. Or is there another reason for this problem? Thanks for any ideas you all may have.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-16-2014, 05:21 PM | #2 |
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Re: How to check "roundness" of wheels?
maybe you have a tight shock
you should be able to spin the wheels // tires on the car. lift the back on stands and put it in gear a tire making the car bounce should be easily detectable Last edited by Mitch//pa; 11-16-2014 at 05:27 PM. |
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11-16-2014, 05:28 PM | #3 |
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Re: How to check "roundness" of wheels?
Install u mounted wheels on a front hub. With the axle on a jack, lower the wheel until it is within a quarter inch of the floor. Rotate the wheel and watch the gap to see if it varies.
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11-16-2014, 05:50 PM | #4 |
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Re: How to check "roundness" of wheels?
A friend had a bouncing car with new tires. His problem was that the tire was not seated properly on the rim. After seating the tire properly, no more bounce! Ron W
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11-16-2014, 06:21 PM | #5 | |
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Re: How to check "roundness" of wheels?
Quote:
Question about how to seat it properly. Before filling with air, do you "bonce" it on the floor a few times? Or how do you make sure it is seated correctly?
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Fred Kroon 1929 Std Coupe 1929 Huckster |
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11-16-2014, 06:32 PM | #6 | |
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Re: How to check "roundness" of wheels?
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Quote:
Thanks guys for the ideas and maybe I have answered my own question. But I am going to wait till the temps around here get up a bit.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
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11-16-2014, 07:04 PM | #7 |
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Re: How to check "roundness" of wheels?
You wouldn't have to take the tire off of the rim to re-seat. Just break the bead on both sides, brush in some tire lube between tire bead and rim, over inflate by 10 or so pounds, and then return to normal pressure.
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11-16-2014, 07:12 PM | #8 |
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Re: How to check "roundness" of wheels?
Now that is something I could do in this cold weather. Will give it a try.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-16-2014, 07:25 PM | #9 |
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Re: How to check "roundness" of wheels?
I was thinking the same thing Ron said. My friend had that problem and I had to let all the air out, then push the tire sides in and spray some WD-40 on the tire bead. It slipped right into place then, as soon as I put air back in.
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11-16-2014, 08:49 PM | #10 |
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Re: How to check "roundness" of wheels?
Thanks guys. Will try to give the tire refilling idea a chance. I should be able to do like Brent mentioned above to check it before I do it and then afterwards. But I am a warm blooded guy and need to wait till the weather warms up a bit. Don't think I want to start the pellet stove in the shop with two Model A's and a pickup stored along with all kinds of gas. Will report back to see how it worked.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-16-2014, 09:08 PM | #11 |
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Re: How to check "roundness" of wheels?
try and use tire soap as mentioned its not detremential to the rubber tube.
Last edited by Mitch//pa; 11-16-2014 at 09:21 PM. |
11-16-2014, 09:19 PM | #12 |
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Re: How to check "roundness" of wheels?
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11-17-2014, 09:04 AM | #13 |
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Re: How to check "roundness" of wheels?
many years ago when I first got my A I installed new tires,what a ride, truck went up and down as it rolled along,I deflated the tires and centered them several times before I got a smooth ride.
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11-17-2014, 12:07 PM | #14 |
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Re: How to check "roundness" of wheels?
When I mount new tires I add about 2-4# and bounce them while turning them 4-5 revolutions and then fill with air and always have a seated bead. Maybe I have just been lucky.
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11-17-2014, 12:39 PM | #15 |
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Re: How to check "roundness" of wheels?
Guys, if this bounce is not corrected after reseating the tire, could balancing perhaps solve the problem? Yes, I know it is not usually done on rear. Just asking if it might help.
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11-17-2014, 12:43 PM | #16 |
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Re: How to check "roundness" of wheels?
Mitch // pa,
What is "tire soap"? Special product? Or plain old dish soap and water? Girl with dishpan hands |
11-17-2014, 12:58 PM | #17 |
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Re: How to check "roundness" of wheels?
do a google search "tire soap"
Last edited by Mitch//pa; 11-17-2014 at 01:22 PM. |
11-17-2014, 01:01 PM | #18 |
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Re: How to check "roundness" of wheels?
As for checking for correct mounting, Check to see if the witness line on the tire is equally spaced from the rim.
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11-17-2014, 04:32 PM | #19 |
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Re: How to check "roundness" of wheels?
The "tire soap" I use is called RuGlyde.
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11-17-2014, 06:01 PM | #20 |
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Re: How to check "roundness" of wheels?
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