S5 Red AXS 1x Road Bike

The Cervelo S5 Red AXS 1x runs a single 50T Aero ring paired with a wide-range 10-36T cassette, removing the front derailleur entirely. It's built on a reworked carbon frame that Cervelo says trims over 6 watts and about 124 grams from the outgoing S5, with the gains concentrated at the fork and head tube. Shallower 42|49mm Reserve wheels on carbon-spoke DT Swiss hubs bring complete weight down to 6.74kg, keeping the simplified drivetrain's weight savings consistent through the wheels.

What Our Gearhead® Experts Are Saying:

"Running a single 50T ring on the Red AXS 1x means the rear derailleur is the only thing doing the work, and the 10-36T range covers everything from a flat sprint to a punchy climb without a second ring to manage. One less mechanical system to maintain is one less thing that can go wrong mid-race."

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® Experts are always here to help.