this may be the wrong thread but a couple of questions: Why, on the GS bikes, are the wheels different sizes? Handling? What would happen if I put the same size wheels and tires front and rear, on my 2012 F650GS? I want to do a bit of off pavement touring and would like to carry only one size tire for backup. SE washington to Anchorage and back. Seems I read somewhere that a guy changed an 03 1150 GS so that it had the same size wheels and tires. Would you go for the taller front match or the shorter rear match. Wide tires or narrow? any thoughts would be greatly appreciated. thinking about heading out this June. Thanks all.