The UCI Approved Astra maintains its vocation of road cycling but increases stability and comfort. It's light, but without pushing the carbon to its limits, preserving Basso's racing DNA but makes it transversal, for those who are not professional athletes, but who want to ride their bikes every day. The new frame features dropped seatstays, a 12mm higher stack height and 3mm shorter reach, creating a slightly more relaxed riding experience. The 35mm tyre clearance allows you to mount wider tyres and venture beyond the tarmac on to light dirt roads.
Frame Specs:
- Sizes: XXS (45), XS (48), S (51), M (53), L (56), XL (58) XXL (61)
- Compatible with Electronic and Mechanical groupsets
- Cable Integration: Fully Integrated
- Brakes: Flat Mount Disc
- Bottom Bracket: BB86 86.5 X 41
- Stem: Basso Paradigma -8 Deg
- Seatpost: Basso 15mm layback
- Headset: Fully Integrated
- Tyre Clearance: 35mm
- Thru Axles: 100/142mm x 12mm
- Frame Weight: 980g
- Warranty: Covered under Basso's 2 Year warranty
- Made in Italy
Bike Specifications:
- Components: Shimano 105 Di2 12x
- Chainset: Shimano 105 Di2 12x
- Disc Brakes: Shimano 105 Di2 12x Hydro
- Disc Rotors: Shimano 105 ICE Rotors 160/160mm
- Cassette: Shimano 105 12x
- Chain: KMC 12x Silver/Black
- Saddle: San Marco Monza
- Handlebar: Microtech All Road
- Stem: Basso Paradigma
- Seatpost: Basso Integral Carbon
- Wheelset: Mavic Cosmic S Centre Lock Disc UST
- Tyres: Schwalbe One Performance TLE Folding 700x30c
Spec may be subject to change due to availability
Upgrade to an Alloy Power Meter

Take this opportunity to upgrade any of the bikes below with a Magene PES P515 Power Meter Chainset. A high precision, spider based power meter and crankset system. This chainset has been designed for riders who want pro level accuracy, exceptional stiffness, and long distance reliability.

Features & Benefits
- ±1% power accuracy using high‑precision strain gauges and acceleration sensors
- Intelligent temperature compensation for consistent readings in changing environments
- Triple-hollow crank design for reduced weight and increased stiffness
- 7075 aircraft-grade aluminium spider, weighing only 99g
- 330-hour battery life for long‑term training and endurance rides
- 110 BCD 4-bolt compatibility with Magene and third‑party chainrings
- 24mm steel spindle compatible with Shimano and major bottom-bracket standards
- Bluetooth and ANT+ connectivity for multi‑device data recording
- Durability tested with over 100,000 pedalling cycles
Geometry
| Size | XXS (45) | XS (48) | M (53) | L (56) | XL (58) | XXL (61) |
|---|---|---|---|---|---|---|
| Seat Tube (A1) | 450 mm | 480 mm | 530 mm | 560 mm | 580 mm | 610 mm |
| Top Tube (B) | 505 mm | 515 mm | 545 mm | 560 mm | 575 mm | 590 mm |
| Reach (R) | 371,1 mm | 371,1 mm | 380,4 mm | 382,1 mm | 384,4 mm | 385,5 mm |
| Stack (S) | 538,9 mm | 538,9 mm | 575,9 mm | 602,4 mm | 625,4 mm | 650,4 mm |
| Seat Tube Angle (C) | 76° | 75° | 74° | 73,5° | 73° | 72,5° |
| Steering Tube Angle (D) | 71,8° | 71,8° | 72,3° | 73,5° | 73,5° | 74° |
| Chain-Stay Length (E) | 404 mm | 404 mm | 404 mm | 406 mm | 410 mm | 410 mm |
| BB to Fork Length (F) | 576,9 mm | 576,9 mm | 593,2 mm | 590 mm | 599 mm | 602 mm |
| Head Tube (H) | 125 mm | 125 mm | 162 mm | 180 mm | 204 mm | 228 mm |
| Handlebar width C/C (M) | 400 mm | 400 mm | 420 mm | 420 mm | 420 mm | 440 mm |
| Stem Length (N) | 80 mm | 90 mm | 110 mm | 110 mm | 120 mm | 120 mm |
Measurements in mm unless marked. Source: https://bassobikes.com/en/bikes/road-bikes/astra










