Deceased 02/10/2010 - R.I.P.
Ducati Corse
Posts: 3,170
Join Date: Feb 2002
Location: Darlington, Co. Durham
Mood: NGRRC Minitwins champion 2007
I should think most DD'ers are on 120/70 17 or 120/60 17 front and 160/60 17 rear. What rim sizes are you using? You would normally need MT3 - MT3.5 on the front and MT4 - MT4.5 on the rear to use these tyres.