In all my years of riding and racing ultra distance races over countless miles I have never broken a chain...until now! In the Furnace Creek 508, just 30 miles from the finish. Just after completing the 10 mile climb up Sheephole pass the chain snapped and rolled right off the cogs onto the ground. bummer. My crew got out of the van and we all just looked at each other. What do we do now? Did anyone bring a spare chain? Nope Master link? Not one in the tool box but we do have a chain tool (lucky us). So, we knocked off half a link and spliced it back together and I was back on the road. Guess I need to remember to throw a master link into the tool box!