The Cervélo Caledonia 5 is the racer’s version of the Cervélo Caledonia. That means it is lighter (the frame is 95g lighter), and comes with internal cable routing with electronic shifting. The Caledonia 5 also has R5 D-Post seatpost, whereas the Caledonia has a round bar, post, and stem. This makes the Caledonia 5 a lighter, faster, and significantly more expensive bike than the Caledonia.