Originally Posted by
3alarmer
If you rode this chain long enough for it to break, there's a very good chance your cogs are worn too. Which is why the shop is telling you this and why it's that much to have them do it.
And I would guess "this pretty good chance" is nearly 100%. The shop is giving you fair warning, and their quote is not out of line at all. It is very rare for me to replace a chain and not have to replace the cassette/freewheel. I throw the chain on and see, but fully expect to have to do the rear cogs.