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How to get rid of flat spots? (tyres)

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Old 23-04-2012, 10:34 AM
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PeterRST
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Default How to get rid of flat spots? (tyres)

Had my MR2 Turbo stored during winter. I even put styrofoam blocks under the wheels. However the ones I put under the rear wheels were quite hard and didnt really flex.

Now I've got a vibration from the rear at 50 - 65 mph. Under and over that it's absolutely fine. Can't tell if the problem existed last season since one of my wheels was buckled. Car is on 100% straight and balanced wheels now.

Any ideas how to get rid of the problem without buying new tyres?

Last edited by PeterRST; 23-04-2012 at 10:35 AM. Reason: 2500 posts - YAY!
Old 23-04-2012, 01:52 PM
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alo
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Rolling burn out?
Old 23-04-2012, 02:30 PM
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Robs Frst
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Never heard of getting rid of flat spots of tyres.

Think you will just have to replace them
Old 23-04-2012, 02:34 PM
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Mk4 Lew
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Originally Posted by alo
Rolling burn out?
sounds fun
Old 23-04-2012, 03:03 PM
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Originally Posted by PeterRST
Can't tell if the problem existed last season since one of my wheels was buckled.

Any ideas how to get rid of the problem without buying new tyres?
fit the spare wheel, and see if you still have the problem
Old 23-04-2012, 06:32 PM
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Glenn_
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Dont store the car and use it lol.Can you not out the car on axle stands when your not using it.
Old 23-04-2012, 06:46 PM
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i expect its the metal banding thats bent so i think you may be buggered but id would put 70psi in and drive them til warm and see if it helps

i dont knows if thats bad but ill try anything once
Old 24-04-2012, 12:35 AM
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check the tyres rated maximum pressure before you try and put loads of air in it
Old 24-04-2012, 07:00 PM
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stevieturbo
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double post

Last edited by stevieturbo; 24-04-2012 at 07:01 PM. Reason: double post
Old 24-04-2012, 07:00 PM
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stevieturbo
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Originally Posted by PeterRST
Had my MR2 Turbo stored during winter. I even put styrofoam blocks under the wheels. However the ones I put under the rear wheels were quite hard and didnt really flex.

Now I've got a vibration from the rear at 50 - 65 mph. Under and over that it's absolutely fine. Can't tell if the problem existed last season since one of my wheels was buckled. Car is on 100% straight and balanced wheels now.

Any ideas how to get rid of the problem without buying new tyres?
How many years was it stored for ? Cant say Ive ever had it happen a car even if sitting parked up for well over a year.

And clearly if the wheels/tyres balanced fine, the wheels/tyres are not the problem. If if the tyres had flat spots ( which actually only occurs after a severe lock up ) the problem would be there at all speeds.

They dont suddenly go from round to flat then round again.

Swap wheels back to front and see if it moves. But it usually takes a huge issue on rear tyres for it to actually be felt.
Old 26-04-2012, 07:33 AM
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PeterRST
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Hi there,

After driving again, I think it's actually not the tyres but the driveshafts. Possibly even an engine mount as I've discovered that it only occurs under high load at relatively low rpm.

Thanks for the advice anyways!
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