3t Ultra Boost Apex Eagle
In stock at 1 shop in New York City
Prices and stock checked Oct 22.
Where to buy
1 shopAbout this bike
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.
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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…
