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Wheel roundness

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Old Jun 17, 2003 | 02:01 PM
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Wheel roundness

Anyone know a good way to check wheels for concentricity (roundness). I have a dial indicater but not sure how to set it up so that the wheel bearing etc. wont cause errors?
 
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Old Jun 17, 2003 | 04:03 PM
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Wheel roundness

Take it to a spin balancer without a tire.
 
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Old Jun 18, 2003 | 02:11 AM
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Wheel roundness

The wheel bearings run at such a low tolerance compared to what you are measuring you can forget them. Unless of course they are worn out or adjusted improperly.
 
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Old Jun 18, 2003 | 10:14 AM
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Wheel roundness

Well I jacked a wheel up and put a dial indicater on it. It's difficult to measure down to a .001 because even the wind moves it that much. However I seem to have no more than .004 in the verticle and horizonal planes. I'm trying to decide to keep or replace these wheels. Now I have to find out what kind of tolerance is Ok or not. It doesn't sound like much.
 
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Old Jun 18, 2003 | 09:00 PM
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Wheel roundness

Beartracks, "bear" in mind (pun intended) that no wheel is perfectly round. The low or high spot (can't remember which) is always at the valve stem hole. That's why the painted dot on new tires should be aligned with the valve stem when mounting. That way the low/high tire spot is matched with the high/low spot on the wheel.

I don't know what the wheel specs should be, but .004" sounds pretty round and straight to me.....
 
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Old Jun 19, 2003 | 03:55 AM
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Wheel roundness

It has to do with the weight offset of the stem and its funny little gravitational pull. the higher side should be opposite the stem.
 
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Old Jun 21, 2003 | 07:09 PM
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Wheel roundness

.004 is excellent!!!
 
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