I have met 4 other riders in the past week who have had similar experiences, (one waiting for parts) I dropped my chain at speed (Cervelo Dual) last Friday night visiting Ottawa and had the rear hanger break. (Cycle Logic by chance had one in stock) I had minimal damage to rear stays and spokes. Had the hanger not broken, I likely would have needed a new rear wheel and frame repair. An employee who works at Fresh Air Experience knows one rider who has broken more than one hanger same chain drop problem. The stops are set so there is no chance of throwing the chain off of the 39.

I am looking to go from a 53/39 11/21 (stock) to a 12-26. I am enjoying small hill repeats and hate the nervous shift of the front, near the top of the hill.

What is the proper way to set the chain length to keep this recurring problem from happening? The chain is the original length as it is with the other riders. Chain wear is not the problem.

Rick