Stock tires lumpy when cold

[Cassidy]

Greetings folks,

Here goes and I'm a newbie! For the first 5 k (3miles)ish when the stock Dunlops are cold, there is a very pronounced thump like a flat spot. Tires warm up thump goes away. I understand the physics of warmer rubber, have checked the tire pressure often, do not experience any balance type vibrations at any speed. There is only 2600 k on the car and the dealer tells me that this is normal for such "high performance tires". Really? I think hmmmm...dealer doesn't want the warranty cost. What's the scoop?

 

[cjstringer]

The dealer is right. If you are in an MP3 with the Dunlop SP 9000s, they do that when cold. It's all good when they warm up though. Not a problem, just part of the experience.

 

[Cassidy]

Thanks a bunch for the info. The tires are on an MP5 and they are 5000 M's. does this make a difference? I'm not going to get into all that performance stuff...yet!

 

[LocoMoto]

Ya that's normal. My tires does that too...nothing to worry about. It doesn't matter what kind of tires you have, they all do this when the car is left sitting for a long period of time in the cold.