Ok... So here's the thing:
We had one yesterday !
Just a little vibration felt by the captain during the initial takeoff roll. He said that felt something strange, but nothing more than that. The flight was pretty short <60min and we continued to destination as we didn't know that anything was wrong.
On first contact with maintenance, he asked us if we felt anything strange during landing roll or taxi in... We said we felt nothing and asked why he was asking. He then told us that one of the tires had failed (tire sidewall rupture).
Searching for similar events on web, I found that that retreading + fast taxi speeds and other operational conditions (ie low tire pressure) usually are the culprit to this kind of event.
Later I discussed with the captain the possibility of not raising the gear in such situation... He promptly rejected, saying that doing so would invalidate the 2nd TO segment.
If I'm the captain, I would definitely think twice before retracting the landing gear...
What you guys think ?