Ever wondered how quickly you could change a wheel?
Well now's your chance to find out.
Milwaukee Tools, the title sponsor of this year's Senior TT, is offering prizes to those that can do it the quickest at its tent behind the TT Grandstand.
The challenge is proving popular with children as the company's Duncan Meechan explained: 'Loads of kids have got involved. At first people were a but hesitant to get involved, but after the kids started doing it has become really popular.'