Originally Posted by
tdonline
How do couplers work in terms of locking up a bike? Couldn't thief foil a lock/chain by uncoupling a bike?
Maybe. You're probably going to put a chain through the chain/seat stay triangle, which doesn't usually uncouple. If you use a Ulock on the top tube you might be vulnerable.
S&S
sells a spanner that's used to undo the coupling, but you could probably do it with channel lock pliers if you didn't care about marring the coupler.