2025 Crust Bombora: A Sporty Steel Frame for Gravel Enthusiasts

The Crust Bombora ($1,125) is a sporty, lightweight steel gravel bike designed for versatility and smooth rides. Optimized for 650b/27.5″ wheels with up to 2.3″ tires, it’s perfect for road, gravel, and multi-day adventures but not heavy-duty trails. For 2025, it features a sleek matte-clear finish and updated brass cable guides.

With its 68 mm bottom bracket shell and lighter tubing than the Crust Evasion, the Bombora delivers a responsive ride without sacrificing durability. It comes equipped with flat-mount calipers, thru axles, and braze-ons for racks and fenders, making it a do-it-all bike ready for your next adventure.

Bombora

The Bombora, a “gravel bike” if there ever has been one. It is essentially a slightly sportier version of the Evasion. The biggest difference between the two is the Bombora has a 68mm bottom bracket shell, so it takes a road crank. It’s ditched the Rocker Dropout for a simple 12mm thru axle dropout. It has a slightly l

Crust Bikes

Specifications:

• Frame Material: Heat-treated Chromoly, TIG-welded
• Wheel Compatibility: 650b (27.5″) with 2.3″ max tire clearance; 700c up to 48mm tires
• Bottom Bracket: 68mm BSA threaded
• Brake Mounts: Flat-mount calipers
• Rotor Sizes: 180mm front, 160mm rear (max)
• Front/Rear Spacing: 12x100mm / 12x142mm
• Frame Weight: 5 lbs (Large size)
• Fork Weight: 3 lbs (uncut steerer)
• Colors: Matte Clear, Sea Monster Green (premium), Pastel Violet