Bike Transportation

Bianchi Boy
Bianchi Boy Posts: 323
edited August 2008 in Workshop
When you take the rear wheel out of the dropout the rear mech folds back in itself. I have seen in the past a gadget similar to a hub with a roller on it that you can put back in to the dropout that maintains the chain tension when transporting your bike with the rear wheel out. I've tried surfing the net to look for these but can't seem to find them anymore. Does anybody know if they are still available and where I could get one from? Thanks