3T Extrema Italia Force/XX SL Eagle Transmission AXS Bike

The 3T Extrema Italia Force/XX SL Eagle Transmission AXS Bike starts from a different set of assumptions than most gravel bikes. Built in 3T's facility in Presezzo, Italy using the brand's Jazz Carbon process — in-house filament winding with high-strength and high-stiffness fibers combined with RTM (Resin Transfer Molding) resin injection — the Extrema Italia is designed around the largest tires you can credibly fit on a 700c gravel frame: up to 57mm WAM (Width-As-Measured). That clearance isn't a footnote; it defines the frame's aerodynamic geometry. 3T's REALFAST philosophy means the tube profiles are engineered around actual measured tire dimensions, not labeled sizes — because a tire mounted and inflated on a rim is often meaningfully wider than what's printed on the sidewall. The result is a frame shaped to redirect airflow around wide, knobby tires efficiently rather than approximating aero performance at tire widths the frame wasn't actually designed for.

The 60mm-wide downtube immediately behind the front tire widens further toward the bottom bracket, profiled to shield rider and bottles from the turbulent wake of wide tires at speed. The headtube runs an elongated aero profile with a sharply truncated rear face, narrowing between the headset bearings to cut frontal drag. Integrated downtube storage with a Fidlock magnetic closure seals tools and tubes inside the frame, away from mud and weather. 3T's More Integrale stem system is built for real serviceability: stack height adjusts without disconnecting brake hoses, stem lengths (80-110mm across sizes) swap without a bleed, and the stem removes entirely for travel without touching the hydraulic lines. Triple mounts on the 3T Fango Extrema Integrale fork legs accommodate cargo cages for any load. The round 27.2mm carbon seatpost accepts wireless dropper and suspension posts, keeping the Extrema Italia viable deep into technical terrain.

The build pairs SRAM Force AXS E1 shift/brake levers and hydraulic disc calipers with SRAM's XX SL Eagle T-Type rear derailleur — deliberately mixing SRAM's proven road-gravel controls with the top tier of their wireless off-road transmission. The SRAM XX SL Eagle XS-1297 cassette runs 10-52T behind a 3T Torno Wide crankset at 40T — a gear range built for technical, mixed terrain with serious climbing. 3T Discus 45|40 LTD carbon wheels run front and rear, paired with Continental Terra Adventure tires at 700x55, filling the frame's clearance with a genuinely capable gravel tire. The 3T Superghiaia Integrale LTD carbon handlebar and K-Edge GPS mount integrated into the More stem complete a cockpit that's ready to ride without add-ons.

Design Benefits

1. Jazz Carbon — Italian Manufacturing From the Ground Up — The Extrema Italia frame is built in-house in Presezzo, Italy using filament winding — a process that precisely controls fiber orientation through complex frame shapes — combined with RTM resin injection to minimize void content and produce consistent carbon behavior. 3T combines high-strength and high-stiffness fiber types within the same layup, allowing different sections of the frame to be tuned independently: stiffer where power transfer demands it, more compliant where the terrain does. This is manufacturing at a level of control that affects how the finished bike actually rides, not just where it was assembled. Made in Italy is the process, not just the address.
2. REALFAST Aerodynamics and the More Integrale Cockpit System — 3T's REALFAST approach means the Extrema Italia's tube profiles are shaped around actual measured tire widths at pressure on specific rims — not nominal sizes. For a 700x55 tire, the WAM can differ significantly from the label, and aero optimization built around wrong assumptions produces frames that aren't optimized for the tires they actually run. The 60mm downtube and widening bottom bracket profile redirect the turbulent airflow from large front tires cleanly through the frame. The More Integrale stem delivers integrated cable routing without the typical penalties: no complex bearing systems, no brake hose trauma during fit adjustments or travel, and stem lengths that swap without a bleed.
3. SRAM Force E1/XX SL Eagle T-Type and 3T Discus 45|40 LTD Wheels — The Force/XX SL Eagle pairing is deliberate: SRAM Force AXS E1 levers and hydraulic disc brakes deliver proven, reliable control, while the SRAM XX SL Eagle T-Type rear derailleur brings SRAM's top-tier wireless off-road transmission to the drivetrain. Behind a 40T chainring on the 3T Torno Wide crankset, the 10-52T cassette covers technical climbs and fast gravel roads without a cassette swap. The 3T Discus 45|40 LTD carbon wheels are engineered as part of the same aerodynamic system as the frame — wide-profile carbon rims running Continental Terra Adventure tires at 700x55, taking full advantage of the 57mm clearance the frame was built around.

Final Take

At $11,699, the 3T Extrema Italia Force/XX SL Eagle Transmission AXS is for the rider who wants to go further off the tarmac than most gravel bikes allow, without sacrificing the aerodynamic design that makes a dedicated gravel frame worth the investment. Italian Jazz Carbon, 57mm tire clearance, SRAM's best wireless transmission, and purpose-built 3T wheels and cockpit make this a coherent platform from the ground up. For adventure riders who race, or racers who go on adventures, this is where the category gets serious.