Cruzbike S40 Recumbent Bike Tech Specs and Fit


Lightweight, road-smoothing hydroformed aluminum frame. The S40 recumbent road bike's wheelbase, trail, and head-tube angle deliver smooth handling, natural cornering and a responsive ride whether you are descending at top speed or navigating twisting back roads.

    Front Triangle

    The famously stiff patented drive system that vaults Cruzbike racers to records and wins, powers the S40 recumbent road bike. It shares the stiff, efficient drive geometry of traditional road bikes and transforms performance cycling technology into an incredibly fun, liberating cycling experience. It also makes Cruzbikes the fastest-climbing recumbent bike in the world.

    This patented drive system not only frees us from the long, inefficient chains and special parts fixed-boom recumbent bikes require, it links the upper and lower body across the drive train as it rotates around the axis of the head tube. This linkage allows Cruzbike recumbent bike riders to increase power when climbing or sprinting by engaging the upper body in much the same way professional cyclists do when they climb or sprint on traditional road bikes.

      Seat-to-Frame-to-Drive Connection

      The Cruzbike S40's carbon fiber seat fits the curve of the frame so that no watt is wasted. As you press your back into the frame, you engage your whole body through the handlebar and cranks. Energy surges through the drive system and powers the bike forward, leaping up hills or accelerating into a sprint.


        The 2023 Cruzbike S40 fork is designed to accommodate a range of setups from fast endurance road to plush Roubaix-style adventure with beefier tires. Plus clearance at the crown for fenders and wide tires is massively improved on the 2023 S40. The product team chose the tough, versatile Maxxis Re-Fuse 700x32c tire for the S40 Complete 2023 for its versatility and performance so you can ride whatever road is calling your name, day after day.

          Racks and Bosses

          The Cruzbike S40 is the machine for fast commuting, multi-day rides, brevets and tours. Possibilities abound when your recumbent bike is fast, light, comfortable and ready to be outfitted for the demands of your cycling ambitions. The frame boasts threaded mount points for racks, panniers, lights, fenders and hydration.

            S40 Complete Components

            The 2023 S40 Complete is outfitted with a Microshift XLE 1x11 system we chose for performance and smooth shifting. The 42 tooth chainring with an 11x42 cassette hits the sweet spot for power on the flats and gearing for the climbs.

            Headset Cane Creek ViscoSet® Headset (This premium headset leverages viscous damping to make learning easier and improve handling)
            Shifter Microshift XLE Right 11-Speed Lever for Cable Actuated Brakes
            Crankset Driveline Crankset 165mm with 42T 110mm Narrow/Wide Chainring
            Bottom Bracket Driveline 68mm English - External Bearing
            Cassette Microshift G-Series 11-42T 11-Speed Cassette
            Chain KMC X11-1 EPT Anti-Rust 1/2"x11/128" EPT
            Brakes 160mm MCX-2 Mechanical Disc Brakes
            Wheels and Tires 32 spoke 3 cross black aluminum rims, aero profile, tubeless compatible, 25 mm wide rim, approx 28 mm depth non-machined sidewalls, Maxxis Re-Fuse 700x32c tires
            Thru-Axles The latest in high-end cycling axles attach the wheels more securely, are stiffer and flex less than their quick release predecessors, resulting in better power transfer and more resilience. For the new thru-axle on the S40 we chose a sleek, leverless style that even houses its own internal removal tool for the axle itself and brake rotors.

            Compatibility Notes

            BB shell: English Thread 68mm
            Front derailleur:
            Braze-on mount
            Flat mount
            Brake adapters:
            160/200 size front and rear for 160mm rotors (this will be brand dependent).
            Hub spacing:
            the front fork is compatible with standard 142 12mm thru axle. The rear dropout is compatible with standard 100 mm hubs.

            Hydraulic disc brakes: The S40 2023 Frameset can be outfitted with hydraulic disc brakes using readily available long brake line kits. The exact proper length will be different for each bike/owner due to handlebar fit variations. Work with your local bike shop on this.


            S40 Complete: 28.6 lbs
            S40 Frameset: 15.5 lbs

            Final weight of a custom-built Frameset will vary depending upon your component choice.

            S40 Geometry

            Wheelbase 1130.3 mm 44.5 in
            Chainstay length - standard 450 mm 17.75 in
            Rake (front fork offset) 30 mm 1.2 in
            Head tube angle (steering axis) 71 degrees
            Trail 91.44 mm 3.6 in
            Backrest angle 40 degrees
            Length of Bike (varies by adjustment and chainstay length)
            Seat Height (low point) 609.6mm 24 in
            BB Height (varies by adjustment)


            The S40 fits riders with an X-seam between 35 inches and 48 inches (about 5'2" to 6'5" body height). Check out the 2021 S40 Fit video here and head over to our Fit page for more great resources on fit.


            S40 FRAMESET: The S40 Frameset includes the frame, front triangle, optional front derailleur holder stalk, carbon fiber seat and cushion, headrest and cushion, custom-designed handlebar and grip tape. Work with your local bike mechanic to craft the perfect build. Instructions can downloaded from the S40 Owner's Resources on this page. The S40 Frameset ships worldwide.

            S40 COMPLETE: The S40 Complete ships with components pre-installed. Plan for 2-3 hours for assembly if you are a novice. Experienced mechanics will be able to complete the assembly in about 30 minutes. Step-by-step assembly video is here. Note: the S40 Complete does not include the optional front derailleur holder stalk because it is configured as a 1x11 system. If you need the stalk, add it to your order notes or reach out to The S40 Complete ships worldwide.