Bikes / Bastion / Gravel
Bastion Gravel 2025 Geometry, Reviews, and Specs Bastion prints the Gravel in Australia the way they print everything else, which is a fancy way of saying this is a custom metal drop-bar, not a warehouse bike. People put it next to dream builds because that is the shop. You are here because you want a Bastion that leaves the pavement.
Read more No OEM studio shot for this model yet.
Fit and steering Gravel Other bikes this size All bikes
Aggressive fit i Slow steering i Fast steering i Relaxed fit i Bastion Gravel 2025 Sizing Guide Recommended Size by Rider Heighti Our recommendation on sizes based on known rider heights. Sizing is individual, but think of this as a good starting point.
Set your height
S M L XL
160 cm 173 cm 187 cm 200 cm
Bastion Gravel 2025 Geometry Chart Size Stack Reach Stack/reach Stem Bar Crank Head tube angle Seat tube angle Chainstay Wheelbase BB drop Wheel size S 548 mm 376 mm 1.46:1 90 mm 400 mm 170 mm 70.8° 73.5° 426 mm 1026 mm 74 mm 700c M 568 mm 386 mm 1.47:1 100 mm 420 mm 172.5 mm 71.2° 73.5° 426 mm 1038 mm 74 mm 700c L 586 mm 396 mm 1.48:1 110 mm 440 mm 175 mm 71.6° 73.0° 426 mm 1050 mm 72 mm 700c XL 606 mm 406 mm 1.49:1 110 mm 440 mm 175 mm 71.6° 72.5° 428 mm 1066 mm 72 mm 700c
2025 colorways No colorway catalog for 2025 yet.
4:24 Bastion 3D printed tech 6:25 New Giro bikes and paint jobs. NEW Canyon Grizl Gravel Bike + Bastion 3D Ti, Pinarello, Cannondale new bikes. @davidarthur ... What changed in the bike frame Same published geometry as 2024.
Published geometry matches the 2024 Bastion Gravel. Same sizes, same stack and reach. What changed in equipment No verified spec sheet for 2025 or 2024.
What changed in price No launch MSRP in the catalog yet.
Compare 2025 and 2024 Bastion Gravel side by side
