If memory serves the BCD for doubles and compacts are different (130 and 110), but someone will correct me if I'm wrong.
That said, I've got a compact on one bike and a double plus a 12-27 cassette on the other - both are fine on the various hills I've encountered in London (admittedly).
If memory serves the BCD for doubles and compacts are different (130 and 110), but someone will correct me if I'm wrong.
That said, I've got a compact on one bike and a double plus a 12-27 cassette on the other - both are fine on the various hills I've encountered in London (admittedly).