My sister wants to join me in biking. She is, shall we say, a hefty gal. Weighing in at probably 280lbs. (she would never tell me) I'm looking to buy her a bike for her birthday so she can start shedding those pounds but I have no idea what kind of bike to get her. As a motivation she has actually signed up with me to do a 300 mile ride in September so I have between now and then to get her in shape. Please help. I need the bike to be strong enough for her weight now but still lite enough that she can crank out the 300 miles (over 3 days) in september. Presumably she will weigh considerably less by the time the race rolls around.