2025 Basso SV Shimano Dura Ace vs 2026 Colnago V4Rs Shimano
The 50s is the Colnago V4Rs Shimano size closest to your 61 Basso SV Shimano Dura Ace. 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 Colnago V4Rs Shimano
Compared with the Basso SV Shimano Dura Ace in 61, the Colnago V4Rs Shimano in 50s places the top of the head tube 22 mm lower and 20 mm further forward, relative to the bottom bracket. Its wheelbase is 14 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −22 mm
- Lower front end
- Frame reach
- +20 mm
- Longer frame reach
- Wheelbase
- −14 mm
- Shorter: quicker to change direction
- Head angle
- −1.0°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Basso SV Shimano Dura Ace numbers we have for size 61 are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Basso SV Shimano Dura Ace 61 | Colnago V4Rs Shimano 50s | Difference |
|---|---|---|---|
| Reach | 390 | 410 | +20 mm |
| Stack | 634 | 612 | −22 mm |
| Head tube angle | 74 | 73 | −1.0° |
| Seat tube angle | 72.5 | not listed | |
| Effective top tube | 590 | not listed | |
| Wheelbase | 1002 | 988 | −14 mm |
| Standover | 857 | not listed | |
| Seat tube length | 580 | not listed | |
| Head tube length | 218 | not listed | |
| Chainstay length | not listed | 408 | |
| BB drop | not listed | 72 |
Differences are the Colnago V4Rs Shimano minus the Basso SV Shimano Dura Ace. Full charts: 2025 Basso SV Shimano Dura Ace, 2026 Colnago V4Rs Shimano.
Where each sits in its class
Basso SV Shimano Dura AceColnago V4Rs Shimano
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 | Basso SV Shimano Dura AceShimano Dura Ace Di2 | Colnago V4Rs ShimanoShimano Dura-Ace Di2 |
|---|---|---|
| Frame | Basso SV | Colnago V4Rs |
| Shifter | Shimano Dura-Ace R9270 | Shimano Dura Ace Di2 |
| Derailleur | Shimano Dura-Ace R9250 | Shimano Dura-Ace Di2, Shimano RD-9250 Dura-Ace Di2 |
| Cassette | Shimano Dura-Ace R9200 | Shimano Dura-Ace |
| Chain | Shimano Dura-Ace | Shimano Dura-Ace |
| Crankset | Shimano Dura-Ace R9200 | Shimano Dura-Ace |
| Chainring | Shimano 52, Shimano 36 | Shimano Dura-Ace, Shimano Dura-Ace R9200 |
| Bottom bracket | Shimano Dura-Ace R9200 | CeramicSpeed T47 |
| Wheelset | DT Swiss ARC 1100 | Shimano Dura-Ace C50 |
| Tire | Continental Grand Prix 5000 | Pirelli P Zero Race |
| Brake | Shimano Dura-Ace R9270 | Shimano Dura-Ace Di2, Shimano Dura-Ace 9270 Di2 |
| Rotor | Shimano Dura Ace Ice Rotor | Shimano CL900 |
| Handlebar | Basso Fuga Integrated | Colnago CC.01 |
| Stem | Basso Fuga Integrated | Colnago CC.01 |
| Saddle | Selle Italia SLR Superflow | Prologo Scratch M5 CPC |
| Fork | not listed | Colnago carbon fork |
| Bar tape | not listed | Colnago Grip |
| Headset | not listed | CeramicSpeed SLT |
| Seatpost | not listed | Colnago D-shape carbon |
| Bottle cage | not listed | Colnago bottle cage |
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