Originally Posted by
globalrider
I'm planning to build a tandem from donor bikes and spare parts, I have a 1 1/8" triple tree suspension fork and the front donor bike has a 1" steerer tube. Can any of you clever bike hackers give me some clues about doing this without risking a broken neck and preferably without welding? I can design it so any front end additional length is between the head tube and the fork.
The question came up once before and someone suggested outboard bottom bracket bearings as a way to run a 1 1/8 fork in a 1 inch head tube.
How about replacing the steerer tube on the fork?
Or cut out a head tube and some or all of a top tube and downtube from another frame and lug than in place of your donor bike's frame.