How to check "roundness" of wheels?

[JackA]

As to the original question, how about a dial indicator from HF?

[Mitch//pa]

Originally Posted by Girl with wrench

Read up on tire soap. Appreciate your help and patience with my newbie questions.

"Girl with reading glasses"

[Fred K-OR]

Originally Posted by JackA

As to the original question, how about a dial indicator from HF?

I was thinking the same thing. Does anyone know of a HF dial indicator that could be used on some kind of rack, post, jack, or ??????

[crock]

You could use wire pulling lube that the electricans use.will not contaminate the rubber.

[C26Pinelake]

Originally Posted by BRENT in 10-uh-C

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.

Brent as usual has the answer !
Wayne

[harleytoprock]

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Using a dial indicator to check trueness of a wheel might be a bit over kill for a car that goes 45-60 mph.

[JackA]

The HF dial indicator comes with a magnetic base and adjustable arm. It's not overkill, it is cheap and easy. No need to read in thousandths, just minimal variation.

[Fred K-OR]

Thanks JackA. Will have to try one of these. Just need something to play around with anyway.

[Fred K-OR]

Originally Posted by harleytoprock

Using a dial indicator to check trueness of a wheel might be a bit over kill for a car that goes 45-60 mph.

But the bump I have that I am trying to fix happens at 15 to 25 MPH. Things are great at 40 to 50 MPH.

[whirnot]

Originally Posted by Fred K-OR

I was thinking the same thing. Does anyone know of a HF dial indicator that could be used on some kind of rack, post, jack, or ??????

Any small pointer can be rigged up, such as a piece of stiff wire in a clamp laying on the floor. It you can't easily see it by eye, it will probably not be a problem. This can check it radially as well as laterally.

[harleytoprock]

One of the problems I see using a dial indicator is that the friction from the rubber tire will try to move the whole indicator throwing off any accuracy. The indicator would need a friction free wheel on the shaft that contacts the tire. whirnot's pointer idea is good. You'd be amazed what the eye can see. I can easily see .005" runout when using my lathe. I true spoke motorcycle wheels that go 100mph using a wire pointer with no problems. I doubt if even 1/16" (.0625') runout on the tire would be felt at 15 mph. I think things would get pretty bumpy at 1/8" (.125") to 1/4"(.250"). Nobody would even need their glasses to see that much runout.