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Old 01-10-2004, 05:24 PM   #1
The Enemy
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Default Static vs Dynamic Wheel Balance

I just got new tires put on and the guy was balancing them statically and putting the counterweights on the back of the wheel. Before they were dynamically balanced with the counterweights on both sides of the wheel.

What's the difference between the two and should I take my car back and have them dynamically balanced?
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Old 01-10-2004, 06:45 PM   #2
2Stroke
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A dynamic balancing machine can detect vibration in more than one plane. It will typically tell the operator to place specific amounts of weight on each side of the wheel, usually at two different places. If the static balance was done on a bubble type device, then the operator is not able to discern whether the weight is better attached to the front or the back of the wheel.

If you feel vibration that wasn't there before, especially thru the steering wheel at high speed, then have your wheels balanced on a modern machine. Generally, dynamic balancing is better.

Luke@tirerack.com is the resident expert on this, and I'd be surprised if he hasn't already addressed this question a few times.
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Old 01-10-2004, 06:49 PM   #3
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Many shops assume that you don't want the rims of your wheels dinged up by clip on weights or the finish damaged by the stick ons.

I prefer dynamically balanced wheels and prefer the clip on weights.

A statically balanced wheel is balanced in one plane, around the centerline of the wheel. This prevents simple up and down movement relative to the centerline of the wheel.

A dynamically balanced wheel is basically balanced on both sides of the hub. This reduces the chance of 'wobble' off axis.

You are less likely to have vibration from a dynamically balanced wheel. Even if you don't feel the vibration, a dynamic balance is probably better for your bearings.
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Old 01-10-2004, 06:57 PM   #4
The Enemy
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The guy used clip on weights, not stick on.

I did a search and didn't see anything regarding balancing and didn't see anything.

Do you think it's worth me taking back the car and having it dynamically balanced? The tires are brand new (put on today) and they told me to bring it back if I had any problems.
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Old 01-10-2004, 07:19 PM   #5
Karl
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Do you have any vibration problems associated with the wheels/tires?
If not, just drive it.
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Old 01-10-2004, 07:27 PM   #6
The Enemy
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No, the tires feel fine right now.
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Old 01-10-2004, 09:51 PM   #7
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If you don't feel any problem, the balancing is fine on the wheels. You will feel the vibration if they are not balanced.
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Old 01-11-2004, 03:31 AM   #8
KoneKiller
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The tire person just assumed you didn't want weights clipped on your pretty wheels.

Big deal? Nah.

Next time you have them balanced, like during a routine tire rotation, you might want to have them dynamically balanced

http://www.autosite.com/garage/encyclop/ency15m.asp
http://www.toyo.com.au/tech_info6.html
http://www.sts.sae.org/servicetech/n...-balancers.pdf
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