Conti had a tough time making the TKC in 120/180 17" sportbike sizes that would pass the proper speed ratings.
They had them in Europe for almost a yr int hose sizes before we did. The demand is coming from owners of pseudo adv bikes, like MultiStrada, Tiger, and big Supermotos (KTM 950/990, Aprillia Dorsoduro, Ducati Hypermotard, etc.)