A prolonged google doesn't appear to show you have DZ03G R-comps over there - is this true....or are they reticent to advertise them?

 

I'm not aware of that tire being available here in the USA.

 

Thanks, a couple of the email responses overnight from vendors seems to confirm that too.

Hankook seems to be rather big over there - and the Sierra Sierra Evo was running Ventus TD Z221 over here last year apparently, are they available?. Other than a mention on a couple of US forums, quite a while ago, doesn't appear to be anyone selling those either.....are there class rules requiring full treaded tyres??.....048 yokohamas seem readily available though, which would seem to undermine that theory.