[ptae2000e]

(Warning: inexperienced newbie car owner)
A couple of times it happened that I've heard something sounding like a flat tire. Flap flap flap... But none were flat, in fact I check prescribed pressure reasonably often and also visually nothing looked wrong.

Any idea what causes the sound? Is it just a stone that got stuck in the thread + poor internal sound insulation (+ I'm too paranoid), or something mechanical in bearings or suspension or something I should get checked at the service? The sound so far always just disappeared after a couple of minutes of driving.

 

[Beevee]

Difficult to answer this one. Probably is a stone caught in the tread. Have a word with your dealer for reassurance.

 

[Scrubnut]

It might just be the road surface. That can make some odd sounds.