At Escapa, we have the perfect bike frames for you from top brands like Factor.
The Factor Ostro Gravel Premium Package Frame is designed to dominate its category with incredible aerodynamics, superior handling, high stiffness, and low weight. With a 45 mm tire clearance, it’s ready to go anywhere and deliver maximum performance on your rides.
REAL-WORLD GRAVEL AERODYNAMICS
Gravel races are fast, and aerodynamics really matter—but they aren’t as fast as road races, so the requirements are different. The OSTRO Gravel frame is carefully optimized for the speeds at which you’ll be riding. Our team used a “zone-based aerodynamics” strategy that focused the front of the bike on aerodynamics—since it encounters clean, unobstructed airflow—and the rear of the bike on lightness, where airflow is too chaotic and ride quality is the top priority. In particular, a great deal of time was spent on the head tube, where a completely new tube shape unlocked significant reductions in drag by manipulating the “laminar separation bubble” that occurs near the front of aerodynamic surfaces at lower speeds. The technology has its roots in the aerospace industry, but all you really need to know is that the OSTRO Gravel will get you to the finish line faster—by minutes, not seconds.
45 MM TIRE CLEARANCE
The OSTRO Gravel offers generous clearance for 45 mm tires on both 700c and 650b wheels, giving you the options and flexibility to tackle the toughest routes and events. This is an actual measurement, with 4 mm of clearance on each side according to ISO standards, making the OSTRO Gravel exceptionally capable in muddy conditions. That was proven at the queen of Gravel races, the 2022 Unbound 200, where heavy rains made the course brutal and the OSTRO Gravel finished in the top 10.
Black Inc INTEGRATED AERO BARSTEM
Aerodynamics and ergonomics: the Black Inc Flared integrated aero stem takes both to new heights, because riding far and riding fast aren’t mutually exclusive. Its medium-depth aerodynamic profile is the result of tireless research and development, initially using CFD (computational fluid dynamics), and then testing prototypes in a wind tunnel. The result is that it outperforms the leading brands of aerodynamic road handlebars—and does so with exceptionally low weight.
STEERING GEOMETRY OPTIMIZED FOR ALL TIRE SIZES
Many mountain and Gravel bikes struggle to deliver effective and safe steering both on and off-road, which usually results in an unsatisfactory compromise between smooth handling and modest tire clearance. The OSTRO Gravel breaks that mold by making tire size an integral part of the geometry.
HANDLEBAR AND STEM COMPATIBILITY
While the OSTRO Gravel pairs perfectly with the Black Inc Integrated Aero Barstem, we’ve designed the front end to be easily compatible with various third-party internal routing systems, so you can always have the exact cable routing you want.
