Hey guys my gf has a CBR 600 and she whips around pretty good, she has a 110/80/17 front and a 140/80/17 rear they are both BT 45's problem is i cant find any tires that will fit this bike that are more sticky. We are doing a track day in july and she complains that the rear is slipping already. I believe that Metezler makes an m1, in a 150/60 rear and 120/60 front, but im not sure if that rear would fit in her swing arm. does anyone know if this combo will work and is it a good idea size wise. The stock rear was a 130 so i kinda dont think this will fit, but i'm at a loss here. Any you old bike guru's out there able to help me out here? Im not sure how the bike will handle with the rim witdth size and the the differnt tire profiles.