Has anyone replaced the rear 180/55 with a 190 ?? Not sure if there is room but it would help to correct the optimistic spedo also. tbtapper
??? Why would you want to do that??? You don't need it for the powerdelivery. It wil ruin the handling of the bike because the bike's way of turning will be a lot worse and their more expensive! If you want to correct the speedo buy a box from robotix to correct it (see the STN website) if your looking foor a good choice of tires. At the moment i run a BT010 front and the new BT020NT rear. and its a great combo! I'm from the Netherlands and love to ride on small backroads through hills and mountains just as much as an occasional trackday and this are the tires for me! good luck and have fun!