TT 2018: Michael Dunlop quickest on eve of Superbike race Michael Dunlop hit the top of the Superbike times on the eve of the opening race of the 2018 Isle of Man TT with a lap of nearly 133mph. The RST Superbike race will be held over six laps on Saturday, with Dunlop, Dean Harrison and Peter Hickman the standout favourites.