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Old 03-21-2014, 07:39 PM   #1
Matt89
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Tires humming at highway speed

Atleast I think it is the tires making the faint humming sound.

It starts once I hit about 103km/h but it stops once I get to 109km/h. What gives??

It's an 08 Focus with 115k km


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Old 03-21-2014, 09:11 PM   #2
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Moved to Wheels & Tires.

Speed dependent like that, it might be related to balance.

That's a common speed range for a balance issue to show up, hitting a "harmonic" at a certain speed is the key to my guess.

Luck
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Old 03-21-2014, 10:07 PM   #3
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Always the same road or different roads?

If it's always the same road, it could be a harmonic with the tread blocks and the roughness of that particular road.
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Old 03-21-2014, 10:26 PM   #4
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The 2008 Focus had issues with rear camber which led to the inside of the tires being worn more quickly. You probably have uneven wear that's causing noise. Take one of the rear wheels off and see if the wear is uneven. If it is do a tire rotation and you should be good.

I had the exact same problem with an old Civic of mine. The rear had too much negative camber and I had a humming noise. Turned out to just be the tires.
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Old 03-21-2014, 11:14 PM   #5
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It happens on different roads. I'm pretty sure it's the balance (alignment?) and/or tire wear as well (pulls slightly to the left). I'm taking it in for a service after the weekend, I'll let you guys know how it went.
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Old 03-21-2014, 11:32 PM   #6
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Most likely tire wear if there is no real perceptible vibration,
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Old 03-26-2014, 07:56 AM   #7
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Any news?
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Old 03-26-2014, 08:38 AM   #8
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Do you have the original Hankook Optimo tires?

Mine got very loud when they wore.

My 2011 also has visible negative rear camber.
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Old 03-26-2014, 03:57 PM   #9
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here is what I am running on my SUV
You don't know tire noise LOL

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