Originally Posted by
Metaluna
Those gadgets that slide into the rear dropout and are supposed to hold the chain while the rear wheel is off. Could never figure out what problem that was solving exactly.
I have one of those. I even use it once in a while. I'm pretty sure the problem it's supposed to solve is the bike owner feeling uncomfortable with the idea of having the chain resting on the chainstay. I suppose it might prevent a little bit of scratching of the paint once in a while if you're the careless sort.
If I'm not mistaken my Long Haul Trucker has a peg brazed on that accomplishes something similar. It must have some useful purpose.