I HAVE A 75 850 COMMANDO ROADSTER. WHAT SIZE TIRES WOULD BE BEST FOR EVERYDAY RIDING. I NEED ADVICE ON THE BEST BRANDS AND SIZES FOR THE FRONT AND REAR TIRE. ALSO HOW DO MOST OF YOU DECIDE HOW MUCH TO INFLATE ACCORDING TO THE PSI OF THE TIRE. DO YOU DO MAX PRESSURE OR DROP IT DOWN A BIT.