anyone dealing with tires flat spotting ?

[byebyeSTI]

so im on my second set of tires , or 3rd counting the stock pilot sports . So my issue is that every time the car sits for a few hours im getting flat spots on the rear tires causing a shake .
i had a set of toyo's first that were really bad , then i swapped to a set of conti's dws 06 and still having the same issues daily . anyone else have this issue ? thanks .

 

[nhcowboy28]

I always jack the car up on stands when not in use.

 

[MerlintheMad]

The Nitto Motivo UHP A/S tires flat spot a little bit. Running for a few minutes eliminates the *thuppity* sensation. I've not experienced any flat spotting on the Michelins. Possibly flat spotting is more a cold weather phenomenon.

 

[byebyeSTI]

I always jack the car up on stands when not in use.

yeah well its a pain on every stop , lol im not talking about winter storage , its an overnight issue

 

[nhcowboy28]

yeah well its a pain on every stop , lol im not talking about winter storage , its an overnight issue

It’s a good workout.

 

[JSolo]

Are the tires noticeably flat spotted? Maybe defective batch? Maybe lack of psi?

 

[Fredman]

https://www.carguygarage.com/storage/car-dollies/flat-spot-preventers

 

[byebyeSTI]

Are the tires noticeably flat spotted? Maybe defective batch? Maybe lack of psi?

maybe defective im running 36/38 psi cold so not that

 

[SRV]

so im on my second set of tires , or 3rd counting the stock pilot sports . So my issue is that every time the car sits for a few hours im getting flat spots on the rear tires causing a shake .
i had a set of toyo's first that were really bad , then i swapped to a set of conti's dws 06 and still having the same issues daily . anyone else have this issue ? thanks .

It sounds like something else is wrong other than flat-spotting.

The only time I had this problem was in spring after taking the 911/993 out of winter hibernation when it had Bridgestone's and sat for nearly 6 months. It was the front tires, and it would take about 50 miles for it to go away, and would not return until the following spring.

Sitting for a few hours would not cause flat spotting - it has to be something else.

 

[Stinger GT SS]

Have you previously locked the brakes up hard from speed, this can cause a permanent flat spot.

 

[nhcowboy28]

Have you previously locked the brakes up hard from speed, this can cause a permanent flat spot.

If you ain’t first, you’re last.

 

[Stinger GT SS]

If you ain’t first, you’re last.

Better than being not at all.

 

[JSolo]

Have you previously locked the brakes up hard from speed, this can cause a permanent flat spot.

Abs would negate this. I don't think disabling traction control disables abs.

 

[RM7]

My General tires do, it goes away after about 2 miles. It generally is only on the first drive of the day.

 

[Devin]

Mine don't but I park on gravel.

 

[byebyeSTI]

so i kinda figured it out , my garage is ground level or a little lower , its allways about 62 degrees on the floor , i checked with a laser thermometer
my rear tires on a 85 degree day were about 98 degrees when i parked . i put down a couple large pieces of cardboard to park on last night , this am on the drive to work it was at least half the time to round back out . that maybe it .

 

[byebyeSTI]

My General tires do, it goes away after about 2 miles. It generally is only on the first drive of the day.

what generals do you have ?

 

[RM7]

what generals do you have ?

All season high performance, forget the model right now.

 

[byebyeSTI]

All season high performance, forget the model right now.

g max as -05 ?

 

[RM7]

g max as -05 ?

Yep