Description:
Basso Astra Shimano Ultegra 8170 Di2 Disc Road Bike - Fulcrum Wind 42
The Basso Astra Ultegra 8170 Di2 with Fulcrum Wind 42 wheels is built for the rider who wants one premium Italian carbon road bike that can train hard, climb well, handle long weekend routes, ride fast in groups, and still feel practical enough for real roads. This is not a narrow, one-purpose race machine. Astra is Basso's versatile performance road platform: light, responsive, comfortable, cleanly integrated, and designed for cyclists who want speed without giving up everyday rideability.
This specific configuration pairs the Astra carbon monocoque frame with Shimano Ultegra 8170 Di2 electronic shifting, hydraulic disc braking, a compact 50/34 crank, an 11/34 cassette, Fulcrum Wind 42 wheels, and a selectable Levita integrated cockpit. For shoppers comparing premium road bikes around $8,000, the central reason to choose this Basso is balance: you get the refinement of Ultegra Di2, a fast mid-depth wheelset, generous 35 mm tire clearance, Italian design, full internal integration, and a frame platform that is performance-focused without being punishing.
Why buy this Basso Astra?
- It is a high-end road bike for riders who do not want to be boxed into one use case. The Astra is fast enough for spirited group rides and endurance events, but its geometry and 35 mm clearance make it more adaptable than a pure aero race bike.
- Shimano Ultegra 8170 Di2 gives flagship-style electronic shifting without Dura-Ace pricing. It is an excellent choice for riders who want crisp electronic shift performance, hydraulic braking, proven Shimano serviceability, and a premium drivetrain feel.
- Fulcrum Wind 42 wheels make this build feel complete from day one. The 42 mm depth is a smart all-round road depth: aero enough for fast rolling speed, but manageable for climbing days and variable wind.
- The gearing is practical for real roads. A 50/34 crank and 11/34 cassette gives range for climbing, rolling terrain, endurance rides, and riders who want a premium build without over-gearing the bike.
- The Astra platform is made for comfort and control. Basso describes Astra as less nervous and more comfortable while still preserving road performance DNA, making it a strong choice for long rides and mixed-quality pavement.
- It has modern clearance without abandoning road-bike identity. Up to 35 mm tire clearance lets the rider choose wider tires for comfort, rough pavement, and light dirt roads while keeping a fast road-bike platform.
- It is a strong alternative to big-brand premium road bikes. If you are comparing bikes like an endurance race bike, an aero all-rounder, or a lightweight road bike, the Astra is for the rider who values Italian design, a distinctive ride, integrated details, and versatility over following the most common mainstream choice.
Who should choose this Astra Ultegra Di2 build?
Choose this bike if you are asking questions like: What is the best premium road bike around $8,000? Should I buy Ultegra Di2 or spend more for Dura-Ace? What road bike is fast but still comfortable? What Italian carbon road bike can handle wider tires? Is there a premium road bike for group rides, climbing, fondos, and weekend endurance rides? This Astra configuration is especially well suited for riders who want one refined, electronic-shifting road bike that can cover many types of riding without feeling compromised.
How does this Astra compare with other possible choices?
- Compared with a lower-priced 105 Di2 bike: this Ultegra 8170 Di2 build is the more premium choice for riders who want lighter, higher-level Shimano electronic components and a more refined complete-bike feel.
- Compared with an ultra-race aero bike: the Astra is easier to justify if you want speed plus comfort, tire clearance, and versatility rather than the most aggressive race-only position.
- Compared with the Basso Venta R: Astra is the more premium and more versatile step-up choice, with a higher-end frame platform and Ultegra Di2/Fulcrum Wind 42 spec in this build.
- Compared with the Basso SV: SV is the top-tier race-focused choice, while Astra is ideal when you want Basso performance and Italian design in a more adaptable all-road performance road bike.
- Compared with buying a frameset and building later: this complete build already includes electronic shifting, hydraulic disc brakes, a clean integrated cockpit, and carbon wheel performance, so it is ready to ride at a high level immediately.
Full specification list
| Frame | Astra carbon monocoque construction, 100% 3K Torayca HMCF T700-MR60 |
|---|---|
| Fork | Astra carbon monocoque construction, 100% 3K Torayca HMCF T700-MR60 |
| Seatpost Clamp | 3B Gen 2 Seatpost Clamp |
| Front Thru Axle | Basso Standard 125 mm x 12 mm |
| Rear Thru Axle | Basso Explorer 165 mm x 12 mm |
| Hanger | Basso Disc Standard |
| Headset | Microtech Integrated Cables Head Set |
| Groupset | Shimano Ultegra 8170 Di2 |
| Crank | Shimano Ultegra Hollowtech II |
| Crank Arm | 170 mm if compatible |
| Chainrings | 50/34 |
| Chain | Shimano Ultegra 12-speed |
| Bottom Bracket | Shimano Ultegra |
| Cassette | Shimano Ultegra 12-speed |
| Cassette Gears | 11/34 |
| Front Derailleur | Shimano Ultegra Di2 2x12 |
| Rear Derailleur | Shimano Ultegra Di2 12-speed |
| Shifters | Shimano Ultegra Di2 Dual Control 12-speed |
| Brakes | Shimano Ultegra hydraulic disc |
| Rotors | Shimano Ultegra 160 mm front / 160 mm rear |
| Cockpit | Levita integrated handlebar; selectable fit options listed below |
| Handlebar Tape | Logo Handlebar Tape 2 mm |
| Wheels | Fulcrum Wind 42 |
| Price | US $7,995 |
Geometry
Use the geometry table below to compare Astra sizing, reach, stack, head tube length, and cockpit recommendations. Every good bike fit starts with the correct frame size, and this product is available across the full Astra size range.
| Size | 45 | 48 | 51 | 53 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|---|
| Seat Tube (A1) | 450 mm | 480 mm | 510 mm | 530 mm | 560 mm | 580 mm | 610 mm |
| Top Tube (B) | 505 mm | 515 mm | 525 mm | 545 mm | 560 mm | 575 mm | 590 mm |
| Reach (R) | 371.1 mm | 371.1 mm | 374.5 mm | 380.4 mm | 382.1 mm | 384.4 mm | 385.5 mm |
| Stack (S) | 538.9 mm | 538.9 mm | 563.4 mm | 575.9 mm | 602.4 mm | 625.4 mm | 650.4 mm |
| Seat Tube Angle (C) | 76° | 75° | 75° | 74° | 73.5° | 73° | 72.5° |
| Steering Tube Angle (D) | 71.8° | 71.8° | 72° | 72.3° | 73.5° | 73.5° | 74° |
| Chain-Stay Length (E) | 404 mm | 404 mm | 404 mm | 404 mm | 406 mm | 410 mm | 410 mm |
| BB to Fork Length (F) | 576.9 mm | 576.9 mm | 586.4 mm | 593.2 mm | 590 mm | 599 mm | 602 mm |
| Head Tube (H) | 125 mm | 125 mm | 150 mm | 162 mm | 180 mm | 204 mm | 228 mm |
| Handlebar Width C/C (M) | 400 mm | 400 mm | 420 mm | 420 mm | 420 mm | 420 mm | 440 mm |
| Stem Length (N) | 80 mm | 90 mm | 100 mm | 110 mm | 110 mm | 120 mm | 120 mm |
Available sizes
- 45
- 48
- 51
- 53
- 56
- 58
- 61
Available colors
- Cobalt Gray
- Black Opal
- Chroma White
Is the Basso Astra good for climbing?
Yes. The frame is light for a versatile road platform, Basso cites about a 980 g frame weight, and the compact 50/34 with 11/34 gearing gives practical climbing range for real-world gradients.
Is the Astra comfortable for long rides?
Yes. Astra is designed to be less nervous and more comfortable than a very aggressive race-only bike, with tire clearance up to 35 mm and Basso's 3B Gen 2 seatpost clamp design contributing to comfort on uneven roads.
Is this bike for racing or endurance?
It can serve both roles. It has the responsiveness and clean integration expected from a premium road bike, but the geometry, tire clearance, and component choices make it especially attractive as a fast all-round road bike for riders who train, climb, travel, and ride long distances.
Is Ultegra Di2 worth it?
For riders shopping at this price level, Ultegra 8170 Di2 is one of the strongest reasons to choose this build. It gives premium Shimano electronic shifting, modern 12-speed range, and hydraulic braking in a package that feels race-ready without pushing into the highest possible price tier.
Why buy this Basso instead of a more common big-brand road bike?
Buy this Basso if you want a bike with Italian identity, a distinctive frame design, modern integration, adaptable tire clearance, and a build that feels premium without being limited to one narrow race scenario. It is for the rider who wants to show up on something special and still make a practical, performance-driven choice.
Shipping
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Return Policy
Our regular policy applies, please check our return policy for more details.