Had the steerer tube break on our tandem with the result that the front wheel and fork fell off while we were riding. The bottom of the headtube impacted the pavement knocking out the lower bearing race and denting the bottom front part of the headtube. A local framebuilder put a new steerer tube on the fork and repaired the headtube for about $20. We had repainted the frame previously and still had some of the paint left over so we could easily touch up the affected parts of the fork and frame.