Chainrings will last for more than "a couple of chains". In the touring world, one is usually advised to replace the chain every 2500 km or so. A steel chainrin

Chainrings will last for more than "a couple of chains". In the touring world, one is usually advised to replace the chain every 2500 km or so. A steel chainring, however, should easily give you 20,000 km of life.