I have been playing around with a design for a bike but I have been 100% unsuccessful in finding a frame that did everything I wanted.
Should I start with a prefabricated frame and modify it or start from scratch? For example, I could buy an old school, non-suspended mountain bike frame and remove the cantilever bosses, grind off the rear derailleur hanger from the rear dropout, remove the unused cable guides from the top tube. I would need to add the brake arm reaction points. I would need a new paint job after these operations.
1. I want to use an internally geared hub, so I need horizontal rear dropouts or an eccentric bottom bracket.
2. I was also wanting to use hub brakes rather than rim, cantilevered or disk brakes. This means no unused cantilever bosses or disk brake bosses. It might mean I need fittings for the reaction arms of the hub brakes or to replace the reaction arms..
3. I wanted relatively relaxed frame angles and a long wheel base (think Pashley Guv'nor).
4. I wanted a high quality frame made with high strength steel tubing (Reynolds 531 or some other decent tubing) to make the frame "lively" and to keep the weight down.