Cervelo built the S5 Red AXS 1x around a reworked carbon frame that trims drag and weight from the outgoing S5, with the biggest gains concentrated at the fork and head tube. A single-ring AXS drivetrain removes the front derailleur entirely, and a shallower wheelset keeps rotating weight down for a build that comes in under 15 pounds. The one-piece bar and stem carries that same aero focus into the front end, cutting bulk without adding extra hardware to dial in fit. What Our Gearhead(R) Experts Are Saying:"Deep into a hard group ride, I've got one less decision to make every time the road pitches up. There's no front derailleur to think about, just a single ring and the next gear."Heads up! We do our best to keep bike specs and images current, but occasional component changes can happen without warning, and sometimes the photos might not show the exact build you'll receive. If you want to double-check the details, our Gearhead(R) Experts are always here to help.