Why would you want to switch the stock size? :scratch:
More rubber down... :skep:DLITALIEN said:The 120/60 to 120/70 has been more popular. You have more rubber on the sides and you can lean more with more rubber contacting the ground.
Yes it is... the 120 is the size in mm of the tread... then its 60 (or 70) % of that width for the side wall then the tire rating and rim sizeDLITALIEN said:The sidewalls aren't taller. The middle of the tire is taller.