Depends on how you ride, the conditions you ride in, and how well you clean and lube it. When the chain has "stretched" 1/16" in 12 links, it's time for a new chain.
I would check it after 1,000 miles.
http://www.sheldonbrown.com/chains.html
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
Last edited by merlinextraligh; 06-30-08 at 08:05 AM.
Reason: add link