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Old 03-05-2012, 06:39 AM   #43
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Thumbs up

Here's some pretty good vid's on the subject.


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Old 03-05-2012, 10:22 AM   #44
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Road force explaination

Road force measures the tire/wheel assembly for the amount of force (in pounds) the tire's high spot exerts on the road. Think of the tire as oval shaped (most are to a degree) when it is rotating, when the high spot hits the pavement, it pushes back into the vehicles suspension causing a vibration at road speeds. An acceptible road force measurement for a passenger car is no more than 25 pounds. I have seen tire assemblys read zero- i.e. a "perfect" tire. Trucks, I believe were no more than 35 pounds. If the roadforce measurement is high- say 68 pounds, you first mark the tire to the rim, dismount the tire, and use the machines program to measure the rim for straightness. Once the rim is proven, the machine tells you where to put your previous marks in relation to the assembly. It could be anywhere from 270 degrees or 15 degrees depending. I performed the operation when I mounted any tire personal or for a customer. I have seen a tire balance perfectly but cause a vibration due to excessive road force. I have also seen the machine recommend tire replacement due to excessive out of round conditions, yet still balance.
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Old 03-05-2012, 06:54 PM   #45
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Hunter GSP9700 Wheel vibration Control System solves wheel vibration and tire pull problems that balancers and aligners can't fix.

Some techs are good with them, and some are outstanding. DISCOUNT TIRE tends to always have them. The link has a locator.

.
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Old 03-05-2012, 09:16 PM   #46
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Is this new technology? Seems like it would produce a better balanced tire. Thanks for the info.
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Old 03-06-2012, 06:18 AM   #47
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Quote:
Originally Posted by desertair27 View Post
Is this new technology? Seems like it would produce a better balanced tire. Thanks for the info.
Well it's at least 3yrs old,(9700), we had one at the Chevy Store I retired from.

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Old 03-06-2012, 09:05 AM   #48
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Goes back ten years or more.
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Old 03-25-2012, 11:15 AM   #49
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Bias ply update

I finally finished installing new brakes and bias ply tires (Carlisle) on our Airstream. I balanced the wheel assemblies on a tire balancer (no road force) and also installed Centramatics. The result is the best tow I have ever expeirenced. No shimmy's felt at all on a 40 mile run at 63-5 MPH. Plus, the increased tire pressure (from 45-old tire rating to the 65 rated on the new tires) made for an eaiser pull.
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Old 03-25-2012, 04:22 PM   #50
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Quote:
Originally Posted by 72 tradewind View Post
I finally finished installing new brakes and bias ply tires (Carlisle) on our Airstream. I balanced the wheel assemblies on a tire balancer (no road force) and also installed Centramatics. The result is the best tow I have ever experience. No shimmy's felt at all on a 40 mile run at 63-5 MPH. Plus, the increased tire pressure (from 45-old tire rating to the 65 rated on the new tires) made for an easier pull.
Did you buy the USA Trail bias ply? I'm going the bias route too and will be buying Carlisle USA Trail tires for my 91. Thanks for sharing your experience - it adds up with the posts of several others on this thread.
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Old 03-26-2012, 05:30 AM   #51
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yes

they are bias, thanks for the feedback.
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