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04 30k miles. Replaced GY runflats with Kumho runflats. Big difference in rear tire noise. After a few months, I notice the noise is back, and there is no signs of wear. On decel coming to a stop, the tire noise is "singing". Outside temps are about 34 degrees, tire pressure is 30-32 cold. Sounds like old snow tires.
I know Kumho says these tires are not for cold weather driving but they don't say why.
So could my rear alignment be off? Bearings? Rear?
The tires may not be for winter as they arent rated for it.
The noise could be caused from low air/ high air pressure, or even balance.
Alignment problems wont make noise, but will wear the tire/tires down and uneaven.
My guess would be that since Kumho says the tires are not good for winter, they are made out of a softer rubber compound for better traction. The cold tempertures is making the rubber harder which is causing the noise. Soon as it warms up a little I bet the noise will be gone.
Thanks, I'll just have to wait for spring. I guess the old saying is right....you get what you pay for. The Kumhos were certainly a bargain runflat compared to the others.
Not for cold weather driving?? Never heard that one before. Perhaps their not recommended for snow traction instead?
Try this: visually inspect the tires for any signs of flat-spotting or cupping in the tread. Run the palm of your hand around and across the tread face.
If you see or feel any sharp edges, that's probably what's making the noise.
Not for cold weather driving?? Never heard that one before. Perhaps their not recommended for snow traction instead?
Try this: visually inspect the tires for any signs of flat-spotting or cupping in the tread. Run the palm of your hand around and across the tread face.
If you see or feel any sharp edges, that's probably what's making the noise.
I hadn't hard about it either until I bought my new Michelin PS2's. Here is a direct qoute off the Tirerack's website under the overview of the Michelin PS2 tire "The Pilot Sport PS2 is not intended to be driven in near-freezing temperatures, through snow or on ice".
I live in STL, but rarely drive my car when it is below freezing, so it didn't concern me too much. I would believe they do not intend the tire to be used under these conditions due to the rubber compound used. As we know, soft things tend to get hard when they are cold or frozen.
I'm running Kuhmo Ecsta SPT's (non-run flats) and a)they do whine in the cold and b) traction falls way off in the cold. I managed to do my first 180 a few weeks ago in the cold, was making a left from a stop, saw someone coming after I committed, stepped on the gas and next thing I knew I was looking back where I came from. Fortunately the other guy was paying attention.