Some of you will remember the trail that the vietcong used to take supplies to the south dueing the 'unpleasantness'.But there was a very valuable lesson for me there,and that has not come to light till now.I am almost 60 [ 2 months ] and in great health,except I had one knee replaced and the other is next.That limits my weight bearing to VERY little,so I took a page from the north vietnamese and went to a bicycle as that will allow me to carry a load of well over 500 pounds,yes you read that right.I could [ past tense ] walk with a full pack of 60 to 100 pounds,now I can load up the bike and carry a load that would kill most men and not even know I have a strain.There maybe some liturature online and that would give you a start on this idea.I am SURE I am not the only one that would like to carry [bike] a real load and not worry about the weight.My 00.02