Originally Posted by
pierce
yes re chain, but no re sprockets. the pitch stays constant as long as the teeth are evenly worn. .
You'll note that I said
effective pitch of a sprocket. It's an important distinction because as sprockets wear the depth of the root increases, this allows the chain to ride lower where the pitch is shorter.
BTW- the oft forgotten roller wear of the chain has the same effective. It doesn't change the pitch of the chain the way pin wear does (stretch) but allows the chain to ride lower on the sprocket, which has many of the same effects.