OPEN UPPER CONCEPT
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OPEN UPPER CONCEPT
Product Details
The OPEN UPPER CONCEPT marks a new chapter for OPEN, introducing a bold direction for their next generation of bikes. This exclusive model is a limited-edition concept, available in just two sizes (Medium and Large) with only 125 units per size to celebrate the OPEN 12.5 milestone. Once the molds are retired, this unique frame will never be produced again, making it a rare collector's item. If you don't fit into the available sizes, there's no need to worry; the full range of U.P. models, with five sizes, will be released in Spring.
So why a concept bike? OPEN’s philosophy has always focused on simplicity and longevity, with innovation aimed at refining what already works. The U.P.PER. CONCE.PT reflects this mindset, introducing new shapes and design features while staying true to the brand’s DNA. This bike highlights the balance between aerodynamics and comfort, a core principle for OPEN, especially in gravel riding. While aerodynamic gains can offer benefits, comfort and compliance are essential for achieving real-world speed. These qualities help riders maintain their position and power over longer periods.
The new frame includes a subtly reshaped downtube, designed to improve airfoil efficiency without compromising compliance. The headtube is also narrower and deeper, reducing drag while maintaining the smooth ride quality that OPEN is known for. With a clean and minimalist design featuring straight chainstays, no front derailleur mounts, and no fender mounts, the UPPER CONCEPT focuses purely on performance and aerodynamics, eliminating unnecessary complexity.
This bike is not just a concept. It is the first frame produced in collaboration with CarbonTeam in Portugal, marking a shift to European production that ensures an even higher level of quality and craftsmanship. Although manufacturing in Europe increases production costs, OPEN has committed to this path to deliver improved customization and performance while keeping pricing as close as possible to current models.
The UPPER CONCEPT represents more than just a new frame. It is a milestone and a limited-edition creation that embodies everything OPEN stands for: innovation, performance, and craftsmanship.
Key Features
- OPEN All-Carbon Frame
- OPEN Carbon One-piece Bar Stem Combo
- OPEN Carbon Seatpost
- Straight Chainstays for Maximum Power Transfer and 44–46mm Tire Clearance
- UDH Compatibility for Standard and SRAM Transmission Drivetrains
| Specification | Detail |
|---|---|
| Stock Colors | Carbon clear black |
| Finish Options | Painted frame with minimalist decals, Paint ready, or Raw-Ready-To-Paint for custom painting |
| Weight (Frame Only) | 845g (Size M, without metal parts, ±3%) |
| Weight (Fork Only) | 370g (Uncut steerer, ±3%) |
| Sizes | M/L (see geometry below) |
| Raw-Ready-To-Paint (RRTP) | No clearcoat required for UV, but recommended for scratch/wear protection. Some riders leave frame bare. |
| BB Standard | T47 threaded bottom bracket (internal cups), 86mm wide shell |
| Recommended Groupsets | Electronic gravel groupsets such as Shimano GRX Di2 or any SRAM eTap. Use a rear derailleur with clutch or damper for off-road use. |
| Front Derailleur Mount | None |
| Front Thru-Axle | 100x12mm superlight Carbon-Ti X-12 |
| Rear Thru-Axle | 142x12mm superlight Carbon-Ti X-12 |
| Front Disc Rotor Size | 160mm only |
| Rear Disc Rotor Size | 160mm only |
| Front Brake Caliper Mount | Smartmount 160 system — attaches flatmount caliper without adaptor |
| Rear Brake Caliper Mount | Smartmount 160 system — attaches flatmount caliper without adaptor |
| Headset | IS52/40 x 45° upper and lower bearings (standard, widely available) |
| Seatpost | 27.2mm round — compatible with dropper and/or suspension posts |
| Contents |
Frame Fork OPEN B.A.R. 1-piece handlebar/stem Options: 80-95mm Stem x 42cm Bar OR 90-105mm Stem x 43cm Bar Seatpost Headset UDH RD Hanger Noise-Reduction Foam Sleeves Bottle Cage Bolts Manual |
| Component | SRAM Rival AXS 1x XPLR 13 Speed | SRAM Force AXS 1x XPLR 13 Speed | SRAM RED AXS XPLR 13 Speed | SRAM Rival / GX AXS Transmission Mullett | SRAM Force / X0 AXS Transmission Mullett | SRAM RED / XX SL AXS Transmission Mullett | Shimano GRX Di2 1x 12 Speed XTR | Shimano GRX Di2 2x 12 Speed |
|---|---|---|---|---|---|---|---|---|
| Levers/Calipers | SRAM Rival AXS E1 HRD Lever/Caliper | SRAM Force AXS E1 HRD Lever/Calipe | SRAM RED AXS E1 HRD Lever/Caliper | SRAM Rival AXS E1 HRD Lever/Caliper | SRAM Force AXS E1 HRD Lever/Calipe | SRAM RED AXS E1 HRD Lever/Caliper | Shimano ST-RX825 GRX Brake/Shift Lever + CALIPER | Shimano ST-RX825 GRX Brake/Shift Lever + CALIPER |
| Crankset | SRAM Rival AXS DUB Wide Crankset | SRAM Force AXS DUB WIDE Crankset | SRAM RED AXS DUB WIDE Crankset | SRAM Rival AXS DUB Wide Crankset | SRAM Force AXS DUB WIDE Crankset | SRAM RED AXS DUB WIDE Crankset | Shimano GRX FC-RX820-1 Crankset | Shimano GRX FC-RX820-2 Crankset |
| Front Derailluer | N/A | N/A | N/A | N/A | N/A | N/A | N/A | Shimano GRX FD-RX825 Di2 Front Derailleur |
| Rear Derailluer | SRAM Rival XPLR AXS 13 Speed Rear Derailleur | SRAM Force XPLR AXS 13 Speed Rear Derailleur | SRAM RED XPLR AXS 13 Speed Rear Derailleur | SRAM GX AXS Transmission Rear Derailleur | SRAM X0 AXS Transmission Rear Derailleur | SRAM XX SL AXS Transmission Rear Derailleur | Shimano XTR M-9250 Di2 Rear Derailleur | Shimano GRX RD-RX825 Di2 Rear Derailleur |
| Chain | SRAM Rival Flattop Chain | SRAM Force Flattop Chain | SRAM RED Flattop Chain | SRAM GX Eagle Flattop Chain | SRAM X0 Eagle Flattop Chain | SRAM XX SL Eagle Flattop Chain | Shimano CN-M9100 Chain | Shimano CN-M8100 Chain |
| Cassette | SRAM Rival XPLR XG-1351 10/46T Cassette | SRAM Force XPLR XG-1371 10/46T Cassette | SRAM RED XPLR XG-1391 10/46T Cassette | SRAM GX Eagle XS-1275 10/52T Cassette | SRAM X0 Eagle XS-1295 10/52T Cassette | SRAM XX SL Eagle XS-1299 10/52T Cassette | Shimano CS-M9200 XTR 10/51T or 9/45T Cassette | Shimano CS-HG710 11/36T Cassette |
| Rotors | SRAM Paceline Rotor | SRAM Paceline Rotor | SRAM Paceline X Rotor | SRAM Paceline Rotor | SRAM Paceline Rotor | SRAM Paceline X Rotor | Shimano RT-CL900 Rotor | Shimano RT-CL800 Rotor |
| Battery/Extras | Battery/Charger | Battery/Charger | Battery/Charger | Battery/Charger | Battery/Charger | Battery/Charger | Battery/Charger | Battery/Wires/Charger |
| Size | M | L |
|---|---|---|
| Suggested Rider Height (cm) | 169–180 | 178–191 |
| Suggested Rider Height (in) | 5'6"–5'11" | 5'10"–6'3" |
| Stack | 570 | 595 |
| Reach | 380 | 392 |
| Seattube Length (BB-to-top of TT) | 483 | 504 |
| Standover | 777 | 799 |
| Headtube Angle | 71.5° | 72.5° |
| Seattube Angle | 73.5° | 73.5° |
| Toptube Length (horizontal) | 545 | 564 |
| BB Drop | 75 | 73 |
| Front Center | 610 | 614 |
| Rear Center | 425 | 425 |
| Wheelbase | 1024 | 1028 |