Continental Grand Prix TT tyres issue

[kampiakseli]

I have found weard issue with both of my Continental grand Prix TT tyres on my time trial bike! There has appeared transverse wear lines on both tyres, and they seem to get worse the more they wear! I have team mate who has same issue with these tyres. Here is link to video how it looks: https://www.youtube.com/watch?v=6CBvDK3mrMM
Is anybody else suffering this? I sende request to Continental too..

[jekyll man]

Worth looking at:
http://www.timetriallingforum.co.uk/ind ... nt-1748144