Open Bikes · Gravel
OPEN UPPER Concept Gravel Bike
The first fruits of 'OPEN 2.0', the UPPER CONCEPT is a rapid, high-comfort gravel bike with true-to-ride aero that doesn't get lost in the weeds.

The OPEN UPPER is a light, nimble gravel bike for fast racing or riding.
Leading with the line “Aero where it matters, comfort where it counts”, OPEN has evolved its massively popular UPPER gravel bike, and the new UPPER Concept is the poster child for the innovative design updates coming down the trail as part of the Swiss brand’s much-toted, ‘OPEN 2.0’ era.
Specifications
- Stock Colors
- Carbon clear black / Raw-Ready-To-Paint
- Frame Weight (M)
- 845g
- Fork Weight
- 370g
- Sizes
- Medium, Large
- Max. Tire
- 46mm
- Bottom Bracket
- T47 threaded with 86mm wide shell
- Compatibility
- Electronic only (GRX Di2 or SRAM eTap rec.)
- Front Derailleur Mount
- None
- Front Thru-Axle
- 100x12mm superlight Carbon-Ti X-12
- Front Disc Rotor Size
- 160mm only
- Front Brake Mount
- Smartmount 160 system attaches flatmount caliper, without adaptor, for 160mm rotors
- Rear Thru-Axle
- 142x12mm superlight Carbon-Ti X-12
- Rear Disc Rotor Size
- 160mm only
- Rear Brake Mount
- Smartmount 160 system attaches flatmount caliper, without adaptor, for 160mm rotors
- Headset
- Identical standard IS52/40 x 45o upper & lower bearing
- Seatpost
- Round 27.2
- Max. Weight
- 120kg / 264 lbs
- Included
- Frame, Fork, Headset, Integrated one-piece handlebar UDH RD Hangers, Noise-Reduction Foam Sleeves, Bottle Cage Bolts
From the ReviewA Stealth Open Upper Concept Gravel Bike
More about the OPEN UPPER Concept
Unlike your typical concept bike, the OPEN UPPER Concept is available and rideable. As you might have noticed, we've cut OPEN's signature dots for ease of writing but spelt correctly, OPEN's CONCE.PT. bike is an imaginatively named gravel bike that signals its new Portuguese credentials - the PT meaning Portugal. As part of the brand's OPEN 2.0 era, OPEN now produces its entire range in Portugal, which the brand has promoted as a net positive for sustainability, proximity to its home base of Switzerland, communication and many other factors.
For longtime OPEN watchers, the UPPER CONCEPT inherits much of OPEN's celebrated design aesthetic but meets modern expectations of aero performance. At this juncture, OPEN's Gerard Vroomen would undoubtedly step in to mention that, while there is a greater awareness of aerodynamics across the OPEN line-up, it comes at zero comprise to OPEN's beloved ride feel, which, as its riders would tell you, trends to the sensational. So compliant is an OPEN frame that its beguiling blend of performance and comfort has been the yardstick for which many other brands have measured the ride characteristics of their bikes. That many have been left wanting is down to Gerard's revered engineering abilities - our words, not his.
It's a simple thing that you should feel so comfortable, but that's the essence of an Open bike.
As OPEN rightly says, 'Aero is irrelevant if the bike is too uncomfortable to hold your position for long.' That's why OPEN optimized aerodynamics and compliance, creating aero shapes without cutting comfort.
The OPEN UPPER CONCEPT starts as a chassis, which includes the frame, fork, seatpost and integrated one-piece bar/stem. After that, the trail is yours. If you'd like to talk about a Regroup Custom build, starting with a chassis and creating your ideal OPEN UPPER, please don't hesitate to contact us.
Aero is irrelevant if the bike is too uncomfortable to hold your position for long.
The Finer Details
The Concept King
The OPEN UPPER is a light, nimble gravel bike for fast racing or riding. Thanks to its incredible comfort, speed and wide-band versatility, you could overnight in the wild and join a fast tarmac group ride the next morning - although you might want to change your tires and leave your bags by the campfire before hitting the asphalt.
Aero Ahead
In OPEN's world, riding faster and farther requires low drag and high comfort. The Swiss brand's new frameset maintains OPEN's legendary frame compliance while adding aero where the bike meets the air - at the front.
Size Is Everything
The OPEN UPPER hits the trail with a custom mindset, with all five sizes (only two sizes for the UPPER CONCEPT) getting their own tube shapes, geometry, carbon layup and many handlebar options.
Find Your Fast
More custom bikesAbout the brand
Open Bikes
OPEN is a bike industry outlier. Its business model, predicated on the concept of “working hard to stay small”, is 180 away from almost every carbon fiber bike brand, who see bigger as undoubtedly better.
Explore Open Bikes
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