Max Biaggi will take to the track aboard the Pramac Racing Team’s Ducati Desmosedici GP13 tomorrow for a two-day test at the Mugello circuit in Tuscany, Italy. The four-time 250cc Grand Prix World Champion and two-time Superbike World Champion will ride the bike of Ben Spies, whose on-going shoulder problem forced him to withdraw from the race this past Sunday and from the Ducati MotoGP test planned for this week. The Pramac Racing Team, along with Ducati, therefore decided to let Max try the Texan’s bike, which had already been prepared for the test. At the moment, this is the extent of the arrangement, and Ducati Test Team rider Michele Pirro will substitute Spies on the Pramac Racing Team bike at the Catalan Grand Prix on 16 June in Barcelona.