As said, clean and grease. Hopefully you're not going to need a new bb/crankset, but if the crank was loose for a decent period of time while you were riding it then it may have worn it out. You should find out if it's still ok over the next few weeks but if it keeps coming loose then you'll need to get an new one.
As said, clean and grease. Hopefully you're not going to need a new bb/crankset, but if the crank was loose for a decent period of time while you were riding it then it may have worn it out. You should find out if it's still ok over the next few weeks but if it keeps coming loose then you'll need to get an new one.