Originally Posted by MTBaddict
If the chain is good, the rings are bad....
At first I though it was my freehub mechanism that was slipping. It was easy to see that the problem was up front when I simply stood next to my bike, applied the rear brake and stomped down on the pedal. The drive train slipped all right, but the chain never moved forward, only the crank turned.
Tried to pedal with the brakes clenched and no slipping on the chain ring...
Originally Posted by
StanSeven
Is this a brand new or used bike? Check the cassette and see if the spacers are properly installed. Also be sure the cassette is tight. A new chain and an old cassette often don't work together. Unless the bike has extensive wear, the chainrings aren't worn.
Used '03 Masi Gran Criterium, cranks/wheels/shifters were purchased used (unknown mileage) by owner who built up the NOS frame, brand new fork, RD, headset, stem and brakes. He didn't mention if the cassette/chain were new or used when he built up this bike. He said he rode it less than 500 miles and from what I can tell the cassette and chain are most likely part of the new components since they have a lot less wear than the cranks/chain rings.
I just checked the spacers and they look just like described in the attachment. So, maybe it looks like I'd just need to get a lockring tool and tighten up the cassette and hope that will solve the problem since the chain and cassettes look good to me, wear-wise.