I have a 2019 street twin and just got back from a 4 day jaunt in Michigan. Started in Chicago -> Gary -> went as far north as Leland MI, spend some time in Traverse City as well. Prior to the trip i replaced the stock street twin tires with some Avon Storms, what a difference tires make. Why does Triumph put a radial on the rear and a bias ply on the front? My street twin post wash.