Anyone have any recommendations/preferences when the time comes for me to replace my set? The bike (07 Yamaha YZF600R) currently has the OEM Bridgestone Battlak (sp?) 57's. I can't find the exact set at their website, only a "56". 120 and 160 x 17 respectively. Not sure of the aspect ratio off the top of my head. Someone recommended sticking with OEM brands for handling purposes but I enjoy trying "new" things sometimes (and, I'm a tire nut).