A brief and unscientific comparison of four popular sport touring tires fitted to a Yamaha FJR1300. I have tried four different sport touring type tyres on my Yamaha FJR1300. Metzeler Z8 which (somewhat oddly) came on the bike when new. Bridgestone BT023, the non GT variation of what is usually fitted to this bike new. Pirelli Angel GT which was suggested by others and Michelin Pilot Road 4 GT.