OPEN Bikes

OPEN Bikes has quietly reshaped the gravel and all-road cycling world. Founded by Gerard Vroomen and Andy Kessler, OPEN focuses on clean engineering, practical versatility, and carbon frames that disappear beneath the rider. The result is a lineup of precision-engineered carbon frames that helped define the modern gravel movement.

At Contender Bicycles, OPEN's complete collection includes gravel, all-road, and endurance road platforms. The updated OPEN UP and UP 2.0 remain benchmark gravel endurance bikes with dual 700c/650b wheel compatibility and tire clearance up to 2.1 inches. The ultralight UPPER and UPPER 2.0 raise the bar for gravel racing, while the limited-edition UPPER CONCEPT represents OPEN's lightest, most focused build.

For riders who want to go farther off the beaten path, the WIDE handles tires up to 2.4 inches for bikepacking and all-conditions adventure riding. The MIND brings OPEN's minimalist DNA to the all-road and endurance road segment, with clearance for up to 32mm tires.

Shop the OPEN lineup by model, including OPEN ONE frames and bikes. Contact Contender for help comparing OPEN frame fit, tire clearance, drivetrain choices, wheel options, and custom build paths.

OPEN Bikes
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Innovation Meets Versatility

OPEN’s approach centers on engineering bikes that perform across disciplines without compromise. Road riders benefit from precision geometry and lightweight frames, while gravel platforms offer stability, comfort, and efficiency over varied surfaces.

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OPEN Road Bikes

The OPEN MIND is lightweight and precise to maximize efficiency on paved surfaces. With 700c wheels, and a carbon frame for road-optimized geometry, it’s built for long rides, spirited solo efforts, and fast group rides.

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OPEN Gravel Bikes

OPEN gravel bikes are built for adventure across mixed surfaces. The OPEN UP and U.P. 2.0 deliver speed and confidence on gravel, dirt, and pavement. The UPPER and UPPER 2.0 offers a lighter, more responsive frame for riders seeking peak performance. The OPEN WIDE balances endurance, comfort, and wide-tire capability for longer, challenging routes. All models feature carbon frames with 700c or 650b wheels, engineered for stability, multi-terrain versatility, and confident handling.

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More Resources

OPEN Bikes
OPEN Media
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At Contender Bicycles, our best tools for selling bikes are the people who ride them. Everyone at Contender Bicycles has extensive experience riding bikes across many brands. If you have any questions or want to discuss build options, we are here to help.