Negative results are still results: chaincase with derailer
August 24, 2014
The executive summary is that an SKS Chainguard, Sugino XD2 double, and old Campagnolo derailer are not a compatible combination; there was no way to make it all fit. It may be that the bottom bracket (115mm, absolute minimum width) was a hindrance.
I had hoped for something like this which we had on some rental bicycles in England:
but I could not find that particular chain guard, and in hindsight it looks like the cranks are curved in a way that helps it work.
I tried lots of bending and shaping, but it looked like I would never get the clearance that I needed. I think the main impediment might be the pedals.
Here’s a Flickr set documenting all the steps; I could annotate this a little better, if someone wants me to do that. I documented my mistakes, too (accidentally put chain guard on with chain trapped behind, had to dismantle to bring around, one of the adjusting screws was insanely tight).