Cervelo Aspero-5 Red AXS Bike

The Cervelo Aspero-5 Red AXS Bike is the result of applying three decades of aerodynamic racing expertise — built through Cervelo's work on road and triathlon platforms — directly to a gravel race frame. The Aspero-5 is 37 watts faster than its predecessor and 34 watts faster than the nearest competitor, figures validated through the same wind tunnel and real-world testing process that has made Cervelo synonymous with aero performance in professional road cycling. The bike made its racing debut under UCI Gravel World Champion Marianne Vos, who won in it — a statement of intent that Cervelo backed up with engineering. Despite the expanded surface area required to achieve those aerodynamic gains, the Aspero-5 carbon frame is 66 grams lighter than the outgoing model. The integrated carbon cockpit — Cervelo ST31 stem and HB16 carbon handlebar — contributes nearly 6 of those total watt savings on its own.

The frameset accommodates tires up to 45mm, and Cervelo has optimized the geometry for both matched and mixed-width tire configurations. This build ships with Vittoria Corsa Pro Control TLR G2.0 at 700x42, and the Reserve 40|44TA GR wheelset — 40mm front, 44mm rear — pairs improved aerodynamics on the leading edge with added traction and stability at the back. That asymmetric setup is deliberate: Cervelo has validated it for technical gravel racing where the front tire's job and the rear tire's job are genuinely different. Integrated downtube storage, adapted directly from Cervelo's P-Series triathlon platform, houses tools and flat kit inside the frame and out of the wind — the lightest and most aerodynamic storage solution the brand has produced. The T47 BBright threaded bottom bracket with a SRAM DUB Wide Ceramic insert rounds out a frame that arrives configured for race day without further modification.

The Red AXS 1 build centers on a SRAM Red 1 AXS E1 DUB Wide crankset with integrated power meter, spinning a 48T aero chainring through a SRAM XX SL Eagle AXS T-Type rear derailleur and 10-52T cassette — the same Eagle T-Type system at the top of SRAM's off-road wireless lineup, here applied to gravel racing. SRAM Red AXS E1 hydraulic disc brakes with SRAM Paceline X Centerlock rotors handle braking. The Reserve 40|44TA GR wheels roll on DT Swiss 240 hubs front and rear, tubeless-ready and set up for the Vittoria rubber at 700x42. The build also includes a Hammerhead Karoo 3 GPS computer, two Arundel Mandible matte UD carbon bottle cages, Cervelo's front computer and rear accessory mounts, a Cervelo Smartpak top tube storage bag, and in-frame storage rolls for tube and flat kit — a complete race setup out of the box.

Design Benefits

1. Aero Engineering From Cervelo's Road and Triathlon DNA — Cervelo's reputation in aerodynamics was built on road and time trial bikes raced at the highest level of the sport, and the Aspero-5 represents the first time that full body of expertise has been applied to a gravel frame without compromise. The 37-watt improvement over the outgoing Aspero and 34-watt advantage over the closest competitor are meaningful at race pace — the kind of gaps that change the calculus of a long gravel race. The integrated carbon cockpit accounts for nearly 6 watts of that saving on its own. The downtube storage system, adapted from the P-Series triathlon platform, keeps tools and flat kit tucked inside the frame and out of the wind. The bike is 66 grams lighter than its predecessor despite the increased surface area — gains that required engineering, not compromise.
2. SRAM Red 1 AXS and XX SL Eagle T-Type — The Top of the Wireless Gravel Drivetrain — The Red AXS 1 build uses SRAM's best electronic gravel hardware across the board. The Red 1 AXS E1 crankset with integrated dual-sided power meter means you have accurate watt data from the moment you roll out. The XX SL Eagle AXS T-Type rear derailleur is SRAM's flagship off-road wireless unit — cable-free, clutchless, and precise across the 10-52T range. The 48T aero chainring is a single-ring gravel setup built for efficiency at higher cadences on fast terrain, with enough gear range via the 10-52T cassette to handle the climbs that show up between the fast parts. SRAM Red AXS E1 hydraulic disc brakes deliver the modulation and power confidence that gravel racing demands.
3. Reserve 40|44TA GR Wheels and the Mixed-Width Setup — The Reserve 40|44TA GR wheelset is built specifically for gravel racing — 40mm front, 44mm rear — with DT Swiss 240 hubs at both ends. The asymmetric depth and width is purpose-designed: the narrower front wheel improves aerodynamics where the leading edge matters most, while the wider rear provides additional volume and traction where the ground contact patch is doing the work. Reserve's Turbulent Aero development program, which Cervelo has supported, uses real-world wind data rather than tunnel-only optimization — a distinction that produces wheels that perform well in the variable conditions of actual gravel racing. Both wheels are tubeless-compatible and arrive paired with Vittoria Corsa Pro Control TLR at 700x42.

Final Take

At $12,650, the Cervelo Aspero-5 Red AXS is a race bike in the fullest sense — aerodynamically optimized carbon frame, top-tier SRAM wireless electronics with integrated power, Reserve carbon wheels on DT Swiss 240 hubs, and a complete accessory package including a Hammerhead Karoo 3. This is what a purpose-built gravel race platform looks like when it's engineered by a company with a three-decade track record of building the fastest bikes in professional cycling. For the rider targeting the front of a gravel race field, the Aspero-5 Red AXS is the answer.