Originally Posted by
Kactus
Worst case, the crack could cause the pulley to break apart and lock up the drive train while riding. It may not be very likely, but why risk it when replacements are readily available?
Exactly what happened to a friend of mine that I rode Eroica Gaiole with in Italy. He ended up stranded because his chain kept ejecting itself from the derailleur cage and attempting to commit suicide in the spokes (the chain, not the friend). No brainer...it's broken...fix it before it leaves you stranded or causes a whole bunch more damage.