pic: Simple Chain-in-Tube Concept

[Ty Tremblay]

Originally Posted by philso

How are you going to attach the two vertical pieces of tubing to the horizontal frame tube on each side? It looks like there is not a lot of surface area and any fasteners that protrude into the frame tube may interfere with the chain and/or sprocket.

We have a TIG welder in our shop, so they'll be welded in place. If you don't have access to a welder, basically any motorcycle shop near you will have one and you could work with them for a sponsorship.

Originally Posted by Gregor

What's the reason for the slots in the tube that mount the gearbox?

Mostly to not over constrain things as stated above. Secondarily to make it so that I don't have to keep track of left and right versions of the tubes since putting a hole in the middle of the tube would cause the tube to interfere with the gear on the rail.