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
120/70 is better. 120/60 is gradually being used less. 120/70 is the common size for racing because it has better turn in characteristics and there is a wider range of good rubber for that size.
[Edited on 29-4-2006 by twpd]