Originally Posted by xenologer

Weight is not my concern.
Fitting a case around both a front and rear derailer is.
Not ready to switch to hub gearing.

But if someone made a big heavy ugly thing that managed to encase both derailers and the wide range of paths the chain makes when changing gears; I'd but it.

Problem is that this needs to be custom fit to each frame and derailer combo, so there's no market for it as an add-on.



I'm almost thinking lately (since i recently swapped out my chain and it was horribly worn out and filthy) that perhaps I could just take a chainguard and flip it upside down. Wouldn't encase the chain by any means, but perhaps just shielding the bottom side of it from the road would help? I haven't studied the details of how exactly dirt gets into the chain, but what how much do you suppose something like that would help?