Dura-Ace chain ring

A friend of mine lent me one of his bikes. It has Dura Ace components. I
wish to take good care of this bike for him while its in my care. My
first task was to clean it up well to get stuff like old chain grunge
off the bike and do a lube.

While examining the components, I noted that the large chainring had
nicks out of the trailing edge of a few 'teeth' (I don't know what to
call them). Is this a serious issue? Should i replace the chain ring?
Will this hurt the chain? What could cause such damage? TIA.

Paul Cassel wrote:
A friend of mine lent me one of his bikes. It has Dura Ace components. I
wish to take good care of this bike for him while its in my care. My
first task was to clean it up well to get stuff like old chain grunge
off the bike and do a lube.

While examining the components, I noted that the large chainring had
nicks out of the trailing edge of a few 'teeth' (I don't know what to
call them). Is this a serious issue? Should i replace the chain ring?
Will this hurt the chain? What could cause such damage? TIA.

Normal for modern chainrings. All sorts of nicks and shaping and guides
and pins and such. To help to shift onto it under load and to shift off
of it under load. Normal.

Qui si parla Campagnolo wrote:

Paul Cassel wrote:

A friend of mine lent me one of his bikes. It has Dura Ace components. I
wish to take good care of this bike for him while its in my care. My
first task was to clean it up well to get stuff like old chain grunge
off the bike and do a lube.

While examining the components, I noted that the large chainring had
nicks out of the trailing edge of a few 'teeth' (I don't know what to
call them). Is this a serious issue? Should i replace the chain ring?
Will this hurt the chain? What could cause such damage? TIA.


Normal for modern chainrings. All sorts of nicks and shaping and guides
and pins and such. To help to shift onto it under load and to shift off
of it under load. Normal.

Thx. Could not imagine how that could have occured under use. -paul