My wife uses our shared vehicle for her 40+ mile commute to work every day. Since I don't have a means of transportation my lifestyle has become very sedentary for the past 18 or so months since I've been unemployed and my weight has really ballooned. I've always been heavy but I'm at my heaviest now, over 400 pounds. I've been thinking about bicycling to both try and drop some weight and potentially have a means of transportation. But I'm worried I am too heavy. Are there bicycles that will support a VERY heavy person?! Any advice, tips or links would be appreciated.