Wheels Manufacturing MFG Emergency Derailleur Hanger
The Emergency Hanger fits virtually any frame, takes up the tiniest amount of space and weighs close to nothing. Having one stashed in your seat bag or pack can keep you from having to walk your bike home.
Please Note: The Emergency Hanger is ideal for emergencies and not recommended for every day use.
If you are not sure the type or size of derailler hanger for your bike get this universal drop out hanger. I had mine all the time just in case, especially if you are doing trail riding, this is your mcgyver tool to use.