had bt-45's on my cbr600f4i, usually replaced 2 fronts and a rear every 6k miles. a great tire and very forgiving if errors were made on entry or mid-corner. turned in nicely and stayed warm but not hot. wanted 'em my 750k, but bridgestone says the minimum rim size is 2.15 while my front rim is stamped 1.85x19. same with dunlop f11's, so settled on metzler lazertecs.