As a Winter backpacker I never carried more than 35 pounds. I could see myself carrying 10 pounds more with a bike, but not doing so just because I could. There are some pieces that are nice but not essential. For one thing, food is much more readily available on the road than the Appalachian trail. An alcohol stove is much lighter and less expensive than a Jet Boil. Tire repair, tools, and security are going to replace luxury items.