2026 Colnago V4Rs Shimano vs 2025 Basso SV Shimano Dura Ace
The 58 is the Basso SV Shimano Dura Ace size closest to your 50s Colnago V4Rs Shimano. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Basso SV Shimano Dura Ace
Compared with the Colnago V4Rs Shimano in 50s, the Basso SV Shimano Dura Ace in 58 places the top of the head tube 3 mm lower and 21 mm further back, relative to the bottom bracket. Its wheelbase is 11 mm longer, which can contribute to stability at speed.
- Frame stack
- −3 mm
- Lower front end
- Frame reach
- −21 mm
- Shorter frame reach
- Wheelbase
- +11 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Colnago V4Rs Shimano numbers we have for size 50s are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Colnago V4Rs Shimano 50s | Basso SV Shimano Dura Ace 58 | Difference |
|---|---|---|---|
| Reach | 410 | 389 | −21 mm |
| Stack | 612 | 609 | −3 mm |
| Head tube angle | 73 | 73.5 | +0.5° |
| Seat tube angle | not listed | 73 | |
| Effective top tube | not listed | 575 | |
| Chainstay length | 408 | not listed | |
| Wheelbase | 988 | 999 | +11 mm |
| BB drop | 72 | not listed | |
| Seat tube length | not listed | 550 | |
| Head tube length | not listed | 194 | |
| Standover | not listed | 830 |
Differences are the Basso SV Shimano Dura Ace minus the Colnago V4Rs Shimano. Full charts: 2026 Colnago V4Rs Shimano, 2025 Basso SV Shimano Dura Ace.
Where each sits in its class
Colnago V4Rs ShimanoBasso SV Shimano Dura Ace
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Colnago V4Rs ShimanoShimano Dura-Ace Di2 | Basso SV Shimano Dura AceShimano Dura Ace Di2 |
|---|---|---|
| Frame | Colnago V4Rs | Basso SV |
| Fork | Colnago carbon fork | not listed |
| Shifter | Shimano Dura Ace Di2 | Shimano Dura-Ace R9270 |
| Derailleur | Shimano Dura-Ace Di2, Shimano RD-9250 Dura-Ace Di2 | Shimano Dura-Ace R9250 |
| Cassette | Shimano Dura-Ace | Shimano Dura-Ace R9200 |
| Chain | Shimano Dura-Ace | Shimano Dura-Ace |
| Crankset | Shimano Dura-Ace | Shimano Dura-Ace R9200 |
| Chainring | Shimano Dura-Ace, Shimano Dura-Ace R9200 | Shimano 52, Shimano 36 |
| Bottom bracket | CeramicSpeed T47 | Shimano Dura-Ace R9200 |
| Wheelset | Shimano Dura-Ace C50 | DT Swiss ARC 1100 |
| Tire | Pirelli P Zero Race | Continental Grand Prix 5000 |
| Brake | Shimano Dura-Ace Di2, Shimano Dura-Ace 9270 Di2 | Shimano Dura-Ace R9270 |
| Rotor | Shimano CL900 | Shimano Dura Ace Ice Rotor |
| Handlebar | Colnago CC.01 | Basso Fuga Integrated |
| Stem | Colnago CC.01 | Basso Fuga Integrated |
| Bar tape | Colnago Grip | not listed |
| Headset | CeramicSpeed SLT | not listed |
| Seatpost | Colnago D-shape carbon | not listed |
| Saddle | Prologo Scratch M5 CPC | Selle Italia SLR Superflow |
| Bottle cage | Colnago bottle cage | not listed |
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