How do you know the correct chain length?
I'm going from a 11-23 cassette, to a 12-25 cassette. I'm assuming I just need to make the new chain 2 links longer than the old chain to cover the extra 2 teeth on the cassette, and the jockey cage will still be able to deal with the extra length when in the 12 tooth.
Or do I just need to add one link and split the difference at each end of the cassette?
I'm going from a 11-23 cassette, to a 12-25 cassette. I'm assuming I just need to make the new chain 2 links longer than the old chain to cover the extra 2 teeth on the cassette, and the jockey cage will still be able to deal with the extra length when in the 12 tooth.
Or do I just need to add one link and split the difference at each end of the cassette?