Good to know: Integrated cockpit · Configurable build
Integrated cockpit (a one-piece bar and stem) on at least one build. Changing the length means replacing the whole cockpit, and not every length exists. Check which length the bike actually ships with before you buy.
Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.
Geometry ?
Basso Diamante 2026 geometry in sizes 45–61: stack 521.7–632.2 mm, reach 374.9–390.7 mm, head angle 71.3–73.6°.
| 45 | 48 | 51 | 53 | 56 | 58 | 61 | |
|---|---|---|---|---|---|---|---|
| Stack | 521.7 mm | 521.8 mm | 546.2 mm | 558.8 mm | 584.3 mm | 608 mm | 632.2 mm |
| Reach | 374.9 mm | 375.2 mm | 378.6 mm | 384.8 mm | 386.9 mm | 389 mm | 390.7 mm |
| Head angle | 71.3° | 71.4° | 71.6° | 71.9° | 73.1° | 73.1° | 73.6° |
| Seat angle | 76° | 75° | 75° | 74° | 73.5° | 73° | 72.5° |
| Seat tube (c-t) | 450 mm | 480 mm | 510 mm | 530 mm | 560 mm | 580 mm | 610 mm |
| Head tube | 101 mm | 101 mm | 126 mm | 138 mm | 155 mm | 180 mm | 203 mm |
| Top tube (effective) | 505 mm | 515 mm | 525 mm | 545 mm | 560 mm | 575 mm | 590 mm |
| Chainstay | 400 mm | 400 mm | 400 mm | 400 mm | 402 mm | 402 mm | 406 mm |
| Stock build by size | |||||||
| Stem | 90 mm | 90 mm | 100 mm | 100 mm | 110 mm | 120 mm | 120 mm |
| Bar width | 400 mm | 400 mm | 420 mm | 420 mm | 420 mm | 420 mm | 440 mm |
Source: bassobikes.com, checked 1 Nov 2026 · bar position: worked out from published data
Older model years in the archive with the same stack, reach and head angle: 2023–2024. Source: bikeradar.com
Stock build
Diamante – Shimano Dura Ace Di2 €10,199
- Groupset
- Shimano Dura-Ace Di2 2×12
- Shifters
- Shimano Dura-Ace Di2 (R9270)
- Stem
- Levita integrated
- Handlebar
- Levita Integrated Carbon handlebar
- Seatpost
- Diamante seatpost
- List price
- €10,199 (bassobikes.com, 1 Nov 2026)
Diamante – Campagnolo Record 13 €9,199
- Groupset
- Campagnolo Record 13 2×13
- Shifters
- Campagnolo Record 13
- Stem
- Levita integrated
- Handlebar
- Levita Integrated Carbon handlebar
- Seatpost
- Diamante seatpost
- List price
- €9,199 (bassobikes.com, 1 Nov 2026)
Diamante – Shimano Ultegra 8170 Di2 €8,499
- Groupset
- Shimano Ultegra Di2 2×12
- Shifters
- Shimano Ultegra Di2 (R8170)
- Stem
- Levita integrated
- Handlebar
- Levita Integrated Carbon handlebar
- Seatpost
- Diamante seatpost
- List price
- €8,499 (bassobikes.com, 1 Nov 2026)
Options when ordering (manufacturer’s default in bold):
| Size | Cockpit | Stem | Bar width |
|---|---|---|---|
| all | integrated cockpit Levita Carbon integrated cockpit Levita Carbon integrated cockpit Levita Carbon integrated cockpit Levita Carbon integrated cockpit Levita Carbon | 90, 100, 110, 120 mm | 400, 420, 440 mm |
Source for all builds: bassobikes.com, checked 1 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size 45 (stack 521.7 / reach 374.9 mm).
Stack and reach within 12 mm of size 48 (stack 521.8 / reach 375.2 mm).
Stack and reach within 12 mm of size 51 (stack 546.2 / reach 378.6 mm).
Stack and reach within 12 mm of size 53 (stack 558.8 / reach 384.8 mm).
Stack and reach within 12 mm of size 56 (stack 584.3 / reach 386.9 mm).
Stack and reach within 12 mm of size 58 (stack 608 / reach 389 mm).
Stack and reach within 12 mm of size 61 (stack 632.2 / reach 390.7 mm).
Spotted a mistake or a missing build? Let me know.