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Speed is your goal. Every ride, whatever the surface, faster is what counts, and this is the gravel bike you’ve been waiting for. The OSTRO Gravel takes its ‘win everywhere’ mentality from its road racer stablemate, the OSTRO VAM, and is likewise developed to dominate its category with incredible aero, superior handling, high stiffness and low weight. With a tire capacity of 45mm, it’s ready to go anywhere, fast.
- Frame TeXtreme®, Toray®, Nippon Graphite® Pitch-Based Fiber
- Fork OSTRO Wide Stance Fork
- Seatpost 0 and 20mm setback available
- Barstem Black Inc Integrated Aero Barstem Reach 80mm, drop 120mm. Multiple stem lengths and bar widths available
- Headset CeramicSpeed SLT 1.5″ bearings
- Head Tube Diameter 1.5″ upper and lower
- Saddle Rail Clamps 7x7 and 7x9
- Bottom Bracket CeramicSpeed T47A Aluminium cups / CeramicSpeed bearings available for DUB, 24mm, or Ultra-Torque
- Cable Routing Internal
- Compatible Components Electronic
- Brake type Disc
- Max Rotor Size 160mm front & rear
- Max Chainring 52-tooth
- Front Axle 12 x 100mm thru-axle
- Rear Axle 12 x 142mm thru-axle
- Wheelset Black Inc THIRTY FOUR
- Wheel Size 700c
- Max Tire Clearance 45mm measured
- Weight 950g
- Manufacturer Warranty Limited Lifetime Warranty
- Groupset Specs
- Groupset SRAM Force XPLR eTap AXS
- Speed 1x13-speed
- Crank 44T
- Cassette 10-46T
- Rotors 160mm
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Features
- Universal Derailleur Hanger
- OSTRO Gravel now supports UDH, ensuring the frame works not only with SRAM 13-speed groupsets, but remains at the forefront of drivetrain enhancements. SRAM developed the UDH to standardize the mounting point and position of the derailleur in relation to the cassette, resulting in smooth, efficient shifting. The UDH offers built-in safety features that allow the hanger to rotate rearward in the event of an accident, pivoting the derailleur away from damaging impacts. And there’s no need to worry about the chain becoming lodged between the hanger and frame thanks to a built-in inner lip that re-routes the chain back onto the cassette. The UDH offers cross-brand compatibility supporting the full range of wireless drivetrains currently on the market.
- Real-World Gravel Aero
- Gravel racing is fast and aero really matters, but it isn’t as fast as road racing 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 ‘zoned aero’ strategy which focused the front of the bike on aerodynamics because it meets clean, or freestream, air flow, and the rear of the bike on lightness, where the air flow is too chaotic and ride quality is the priority. In particular, a lot of time was spent on the head tube, where an all-new tube shape unlocked significant drag reductions by manipulating the ‘laminar separation bubble’ that occurs near the front of airfoils at lower speeds. The tech is rooted in aerospace but all you really need to know is that the OSTRO Gravel will get you to your finish line faster, and by minutes, not seconds.
- 45mm Tire Clearance
- The OSTRO Gravel offers a generous 45mm of tire clearance in both 700c and 650b, giving you the options and possibilities to tackle the toughest routes and events. This is a real figure, with 4mm of clearance either side in accordance with ISO standards, so the OSTRO Gravel is super-capable in muddy conditions. That was proven at the queen of gravel races, the 2022 Unbound 200, where heavy rain made the course brutal and the OSTRO Gravel was ridden to a top-10 finish.
- Black Inc THIRTY FOUR Carbon Gravel Wheels
- The new Black Inc THIRTY FOUR wheels are - like the OSTRO Gravel itself - dedicated to speed on gravel. Their 34mm depth maximizes aero gains while keeping weight to a minimum and avoiding too tall a combined rim and tire side area, ensuring crosswind stability. They’re most aero with a 32mm tire for all-road use, yet also very effective for gravel tires up to 43mm. The internal width of 25mm allows bigger tires to take a better shape. The hookless rim is designed to make it easy to mount tubeless tires, in most cases with a regular floor pump. The rim includes a secondary shoulder which keeps the tire securely seated in the event of a rapid deflation, allowing you to come to a controlled stop. The Black Inc hubs run on CeramicSpeed bearings for ultimate efficiency.
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