[EricH]

Originally Posted by Alex.q

We used c-channel instead of 2x1 box because it seemed to us easier to bolt things on to c-channel than box. With a box frame, you wouldn't be able to get a nut on a bolt. Do other teams usually use rivets to avoid this problem?

Most teams that use box tubing just go all the way through both sides of the tubing and put a nut on the bottom.

I put chains on the outside on the middle to the back wheels, and the chains on the inside on the middle and front wheels. Maybe I'm wrong, but at the time I did it, it seemed like that would take less space and the wheel wouldn't have to be cantilevered as far. In any case, I believe the bumpers should adequately protect the chain, won't they?

I would want the chain inside of the wheels. Less cantilever to the sprocket means less chance for the chain to jump the sprocket.

I wouldn't worry about the bumpers protecting the chain so much as the chain rubbing the bumpers...

You could also try a trick that a number of teams using WCD pull--they run their chains inside the frame outline.