At 6 feet and 205-210lbs I've never been a climber. When I was 30 I wasn't a climber and the past 25 years has done nothing to help. Luckily, I live & do most of my riding in Southeast Virginia where hills are a minor problem. I've considered the whole body in motion tends to remain in motion thing when considering weight in bicycles, both DF & recumbent, but there's so much emphasis on weight in practically everything you read about bikes that it's hard to completely dismiss it.