Cervelo Caledonia 105 Black

From Cervelo website

Caledonia uses a standard round bar, stem, and seat post, giving riders the option to build their ultimate ride without compromise. Integrated accessory mounts and hidden fender mounts keep the bike’s refined lines so you can ride with lights and computers in a downpour and still look fast.

Rather than designing multiple versions of the bike with various fit profiles like we’ve done in the past, we designed a system that enables a broad range of fits on a single bike while maintaining the aesthetic and functional cleanliness we demand. Modern road riders are looking for bikes to handle long-distance, high pace, no limits, and offer maximum fun. By placing lower modulus carbon in key areas to mitigate the brittleness of hi-mod fiber—the Caledonia delivers performance, comfort, and speed. Oh, and you can fit a 34mm tire in there. Or 31mm with fenders.