OPEN UPPER 2.0 Frameset
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OPEN UPPER 2.0 Frameset
Product Details
The OPEN UPPER 2.0 Frameset is a fast, light, and agile gravel bike designed for riders who want speed without sacrificing comfort. Whether you're racing gravel, tackling fast tarmac rides, or packing for an overnighter, the U.P.P.E.R. delivers efficient performance across mixed terrain. Its frame blends aerodynamic shaping at the front with proven compliance in the rear, making it easier to hold your position over long distances while still cutting through the wind. Made entirely in Portugal, this frame reflects OPEN’s commitment to sustainability and precision quality.
Designed for tires between 35mm and 46mm, the OPEN UPPER balances sharp, responsive handling with all-day comfort. Ultra-thin seatstays help absorb vibrations from rough terrain, while straight chainstays ensure maximum power transfer when you're putting down the watts.
New for this build is the OPEN B.A.R. (Break All Rules) one-piece carbon handlebar and stem. Its closed-structure composite design reduces weight and eliminates stress risers for greater long-term durability. An integrated expander secures the bar to the steerer and allows for 15mm of fore-aft adjustment in 5mm increments to the reach ( A visualizer showing how adjustments can be made is shown below).
The deep headtube, internal routing, and aero-specific handlebars all contribute to its low-drag profile, while features like a T47 threaded bottom bracket and UDH derailleur compatibility make it easy to maintain and upgrade. This is a bike that’s built to go fast, but also built to last.
Key Features
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Balanced Speed & Comfort: Aero frame design up front with thin, compliant rear stays for all-day performance
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Made in Portugal: High-quality frame construction with full carbon layup and modern standards like T47 BB and UDH
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Custom Fit & Feel: Size-specific geometry, carbon layups, and fork crowns tailored to each frame size
*Please note that bike specifications are subject to change without prior notice
| Specification | Detail |
|---|---|
| Stock Colors | Carbon clear black (Paint Ready or Raw-Ready-To-Paint) |
| Paint Description | Minimalist decals, clearcoat optional for RRTP |
| Weight (Frame) | 845g (Size M, ±3%) |
| Weight (Fork) | 370g (Uncut steerer, ±3%) |
| Sizes | M/L (see geometry for more info) |
| BB Standard | T47 threaded (internal cups), 86mm wide shell |
| Groupset Compatibility | Shimano GRX Di2, SRAM AXS (1x & 2x) |
| Max Chainring Sizes |
Shimano GRX 1x: up to 52T SRAM AXS 1x: up to 52T Shimano GRX 2x: all cranksets (max 48/31T) SRAM AXS 2x: all cranksets (max 50/37T) |
| Front Derailleur Mount | None |
| Front Thru-Axle | 100x12mm superlight Carbon-Ti X-12 |
| Front Rotor Size | 160mm only |
| Front Brake Mount | Smartmount 160 (no adapter needed) |
| Rear Thru-Axle | 142x12mm superlight Carbon-Ti X-12 |
| Rear Rotor Size | 160mm only |
| Rear Brake Mount | Smartmount 160 (no adapter needed) |
| Headset | IS52/40 upper & lower (45° bearing) |
| Seatpost | 27.2mm round (dropper/suspension compatible) |
| Indoor Trainer Compatible | Yes (see OPEN's documentation) |
| Max Rider + Luggage Weight | 120kg / 264 lbs |
| Test Standards | EN / ISO / Internal Testing |
| Included with Frameset |
Frame, Fork, OPEN B.A.R. handlebar/stem, Seatpost, Headset, UDH 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 |
| Measurement | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Common Rider Height (cm) | < 165 | 160–171 | 169–180 | 178–191 | > 188 |
| Common Rider Height (in) | < 5'5" | 5'3"–5'8" | 5'6"–5'11" | 5'10"–6'3" | > 6'2" |
| Stack (mm) | 520 | 545 | 570 | 595 | 620 |
| Reach (mm) | 356 | 368 | 380 | 392 | 404 |
| Seattube Length (mm) | 418 | 449 | 483 | 504 | 518 |
| Standover Height (mm) | 713 | 745 | 777 | 799 | 815 |
| Headtube Angle | 70.0° | 71.5° | 71.5° | 72.5° | 72.5° |
| Seattube Angle | 73.5° | 73.5° | 73.5° | 73.5° | 73.5° |
| Top Tube Length (mm) | 506 | 525 | 545 | 564 | 584 |
| BB Drop (mm) | 82 | 77 | 75 | 73 | 72 |
| Front Center (mm) | 589 | 590 | 610 | 614 | 634 |
| Rear Center (mm) | 425 | 425 | 425 | 425 | 425 |
| Wheelbase (mm) | 1000 | 1003 | 1024 | 1028 | 1049 |