Go buy an extra derailleur hanger for every bike you own and place it in the appropriate saddle bag. If you have an accident on the road or trail and bend a derailleur hanger you'll be able to put the new one on and continue your ride.
ATTENTION! Our South Boulder shop will be closed on Tues. for inventory counts (North store will be open!). Our North Boulder shop will be closed on Wed. for inventory counts (South store will be open!) Sorry for any inconvenience!