Originally Posted by
VaultGuru
My question is - how did your chain blow? Was it during the climb, under continuous pressure? Did you have a transition from flat/downhill to hill and mis-time the shift, and/or jump too many gears during the shift? Did you grab a lower gear during the climb and not back off your cadence (pressure) during shifting?
+1.
IMHO, these are the questions you need to ask when a chain breaks. Until you know the root cause, you won't necessarily be able to preclude future occurrences. Sometimes there's just a bad batch of chains, sometimes the pressed-in rivet isn't seated properly but most times on a tandem it's caused by a shift under load / operator-induced problem.