My son’s girlfriend has started out on a 100km cotswold camping and cycling weekend. Rear hanger has snapped and local bike shop doesn’t have a replacement ( not surprising because of the sheer number of patterns). I could only suggest shortening chain and running it single speed. She has decided to abandon and will have to get a taxi from campsite tomorrow morning. Any ingenious jury rigs that you guys know of? 3 by 8 road chainset.