Do Nittos flat spot?

[Shaker1]

Ever since I've had the 555 (front) and 555r (rear) I have had a slight steering wheel shake for the first few miles every time I drive. Always goes away after appx 2 or 3 miles!

If it were a wheel balance issue I don't think it would go away. The only thing I can imagine is that the tires take a "set" after sitting for 8 hrs or so. Does this make sense? Ideas?

 

[stkjock]

I'd find that very unlikely. how much pressure in the fronts?

 

[evasive]

They aren't flat spotting. I'd check air pressure and make sure they are road force balanced.

 

[Moburto10GT]

I wouldn't think that they would flat spot that quickly. I do know that after my car sat for a few days when i was on vacation that i did have a little steering wheel shake and it also went away after a few miles of driving.

 

[R1Lello]

Yes they do, radials aren't near as bad as the past bias ply but they do, that's why I store mine for 6 mths in the winter with an extra 5-7 lbs.

 

[evasive]

They do but not in 8 hrs....

 

[VirtualSVT]

how cold is it? My BFG DR's would only flatspot on a real cold night.

 

[GOTSVT?]

John Force style burnout

 

[Sniperdog]

Yes they do, radials aren't near as bad as the past bias ply but they do, that's why I store mine for 6 mths in the winter with an extra 5-7 lbs.

This^^^.,,. any tire can flat spot .,. but improper tire pressure is prolly the biggest reason for it in todays tires :-D

 

[Shaker1]

I keep them around 30 psi for daily driving. And it clears right up after a few miles driving. I'll look into a road force balance.

It just seems odd that it goes away after a few miles? Was worse when I took it out after it sat for 3 months and the temp was around 50 degrees. I had the shake at 30 MPH. Usually it is not noticeable until 45 MPH.

 

[evasive]

As your tire heats up, pressure increases. Try adding a few pounds to your tires - the factory says to use 35lbs for proper inflation. Not sure why you are running 30.

 

[Shaker1]

Thanks for the input. I thought everyone ran DRs a little low for traction, especially on these cars? Actually I usually stick with 32, but will try 35.

I suppose I could try putting my OEM fronts on to see if I can find out if it is front or back too. Maybe narrow it down to a single wheel.

 

[stepuptata]

My front 555 had to be replaced due to flat spotting.
My rear 555r are terrible. Car sat for 3 months and it shakes terrible!

 

[Robertt305]

I always ran 25psi in the street with my 555R's....

Yes they do flat spot after a few days but a little driving gets them round again..

 

[Robertt305]

Let me rephrase...... 25psi city and for long highway trips I would bump up to 32-35psi depending on temperature

 

[GT500RedStripe]

Did a TPS come loose?

 

[stkjock]

if you know the car is going to sit for an extended period one should pump the air up to 35-37 psi (imo) or get the weight off them by lifting the car and using jack stands

 

[09Troublemaker]

sounds like a psi issue. they dont flat spot in 8 hrs

 

[white88lx]

+1 for the roadforce

Could have been just as simple as going to the tire shop where they had a shitty calibration on the balancers. It happens i worked at one for 5+ years during school

 

[realm187]

I know one thing. Even with D/Rs these Shelbys love to spin. Lol