I'm trying to convince the bank to help me set up a bike shop and I need some figures. What do you ride? How many weeks a year do you ride? How many sets a of tires do you use? how many sets do you have at any given time (dry weather, rock terrain...? would all your year's tires in one go if you were offered a good deal? How many times do you change your brake pads, drive chain... a year? realy appreciate any help!