Topic: To replace or not replace - Sprockets

[JWB]

To a novice like me these sprockets look ok, but not sure.  So from the picture, can you tell if they need to be replaced or not?

[bryanj]

Yes, if you look at the semicircle at base of teeth it is "deformed" to one side

[seanbarney41]

agreed...those are shot

[Bodi]

I have seen worse rear sprockets but not often. The front one, it's not so easy to say but just get a new one. And a chain of course. Best to always replace the chain and both sprockets.
bad sprockets will ruin a new chain quickly. A worn chain will damage new sprockets quickly.

[Alan F.]

I'd be tempted to keep that front sprocket, cheap bastard that I am. I guess I'd better buy some new ones and leave it at that.

[PeWe]

A worn sprocket will shorten the life of a new chain. Sprockets are cheap compared to a good chain.

[Old Moe Toe]

Depends on how "sphincterly challenged" or tightassed you are. I know a guy who on a "round Australia" trip back in the day only changed his sprockets when they were so worn they would no longer turn the chain.

[pjlogue]

Don't think I have seen a rear sprocket that badly worn before.  Yes, replace the sprockets.  If the sprockets (rear at least) are that worn, I would replace the chain as well. 

-P.

[JWB]

Much obliged for the input.  New sprockets have been ordered.

[BenelliSEI]

...... and a chain.