3T Ultra Boost Apex Eagle Bike
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3T Ultra Boost Apex Eagle Bike
3T Ultra Boost Apex Eagle Bike Info
The 3T Ultra Boost Apex Eagle Bike starts from a different premise than most gravel eBikes. Rather than adapting a mountain bike platform for drop bars, 3T took the Exploro Ultra — their purpose-built aero gravel frame — and integrated the Mahle X20 motor system inside the same carbon chassis. The geometry, tube profiles, and steering feel of the original Ultra carry over unchanged. What's new is what's hidden: a motor and 350Wh battery that expand where the bike can take you without changing how it rides when you don't need the assistance.
REALFAST Aerodynamics
3T engineered the Exploro Ultra around what they call REALFAST aerodynamics — actual tire measurements, not label widths, dictating frame shape. The downtube runs 75mm wide at its base to fully shield the water bottle and redirect turbulent air coming off the front wheel, then narrows to 60mm at the neck to catch airflow exiting the tire. A close-fitting rear wheel cutout minimizes the gap between tire and seat tube. Double-drop chainstays serve two purposes: better crank and tire clearance on the drive side, and a stiffer, lighter structure behind the bottom bracket where both stays drop. The fork uses a pure-road crown length — 25mm shorter than a typical gravel fork — which tightens the steering geometry, reduces weight, and improves front-end stiffness without sacrificing ride character on mixed terrain. The aero seat tube is designed around a 27.2mm round post and accepts both dropper and suspension seatposts, options that most aero frames close off entirely.
Mahle X20: Integrated and Unobtrusive
The Mahle X20 system delivers 55Nm of torque through an integrated setup designed to feel like an extension of your effort. Three power modes are configured specifically for the Ultra Boost, and a fourth is fully customizable through the MySmartBike app. The system communicates over Bluetooth and ANT+, making it compatible with Garmin head units without additional sensors. On the 350Wh integrated battery, 3T's data indicates that a rider under 75kg can cover more than 150km with 2,000m of climbing on a mix of gravel and pavement — enough for a full day in the hills without conserving power on the climbs. For longer objectives, a separate 173Wh Mahle battery extender (1.1kg) mounts to the seat tube's bottle cage and extends total range by roughly 50%. A bike that already goes far enough for most days, with a credible answer for the days it doesn't.
Apex Eagle: Wide Range, Proven Gearing
The Apex Eagle build pairs SRAM's Apex Eagle rear derailleur with a 40T chainring and an 11-50 NX cassette across 12 speeds. The ratio spread is deliberately wide — useful on sustained climbs, loose surfaces, and anything in between where tighter road gearing would leave you spinning out or grinding. SRAM Apex hydraulic disc brakes with 160mm rotors handle stopping with consistency in wet and dry conditions alike, and 3T's direct-mount brake standard eliminates the adaptors most frames require for that rotor size. The cockpit is 3T throughout: an Apto Stealth stem and Superghiaia LTD flared drop bar keep the rider in a lower, faster position than the flat-bar Urban version, with enough flare at the drops for confident control on rough descents. Rody alloy wheels and Pirelli Cinturato Adventure 700x45 tires handle the surface variety the Ultra Boost is built for — capable on loose dirt, smooth on gravel, honest enough on tarmac that the road sections between trail heads don't feel like a penalty.
The Apex Eagle is the entry point into the Ultra Boost lineup, and the build that prioritizes range, mechanical simplicity, and durability over electronic shifting or carbon wheels. Available in six sizes from 48 to 61cm in Black/White, it fits a wide range of riders and puts the full capability of the Exploro Ultra platform within reach — with enough motor assistance to push deeper into the day, pace with a faster group on mixed terrain, or take the detour that would otherwise be out of reach.
3T Ultra Boost Apex Eagle Bike - Specifications
*Specifications are subject to change.
3T Ultra Boost Apex Eagle Bike Geometry
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The R&A Transporter Bike Box
Shipping bikes can be tricky. They are big and bulky but delicate. Shipping your passion / investment is nothing we take lightly. We go through great detail to ensure your new ride will get to you in perfect condition.
So you've purchased the bike of your dreams! We've put together this video to outline the R&A concept of shipping bikes and the steps we take to get you your new bike in perfect condition. It will show you the careful steps we take to assemble your bike to make it as easy as possible for you to get your bike on the road when you receive it. Ready to ride. It will also show you the tips and tricks of removing all of your parts in the most careful way to ensure your riding as quickly as possible.
