2023 Specialized Roubaix SL8 Comp vs 2025 Pinarello X9 Shimano Dura Ace
The 450 is the Pinarello X9 Shimano Dura Ace size closest to your 44 Specialized Roubaix SL8 Comp. 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 Pinarello X9 Shimano Dura Ace
Compared with the Specialized Roubaix SL8 Comp in 44, the Pinarello X9 Shimano Dura Ace in 450 places the top of the head tube at about the same height and about as far forward, relative to the bottom bracket.
- Frame stack
- −1 mm
- About the same height
- Frame reach
- −1 mm
- About the same reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- +1.2°
- Steeper: sharper steering
- Chainstays
- +4 mm
- Longer: more planted
The two frames
Only the Specialized Roubaix SL8 Comp is drawn. The Pinarello X9 Shimano Dura Ace numbers we have for size 450 are missing the wheelbase.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Comp 44 | Pinarello X9 Shimano Dura Ace 450 | Difference |
|---|---|---|---|
| Reach | 353 | 352.1 | −1 mm |
| Stack | 540 | 539.2 | −1 mm |
| Head tube angle | 69.3 | 70.5 | +1.2° |
| Seat tube angle | 75 | 74.5 | −0.5° |
| Effective top tube | 503 | not listed | |
| Chainstay length | 418 | 422 | +4 mm |
| Wheelbase | 994 | not listed | |
| BB height | 269 | not listed | |
| Standover | 686 | not listed | |
| Seat tube length | 365 | 450 | +85 mm |
| Head tube length | 90 | 128 | +38 mm |
| BB drop | not listed | 72 |
Differences are the Pinarello X9 Shimano Dura Ace minus the Specialized Roubaix SL8 Comp. Full charts: 2023 Specialized Roubaix SL8 Comp, 2025 Pinarello X9 Shimano Dura Ace.
Where each sits in its class
Specialized Roubaix SL8 CompPinarello X9 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 | Specialized Roubaix SL8 CompSL8 Comp | Pinarello X9 Shimano Dura AceShimano Dura Ace Di2 |
|---|---|---|
| Frame | Specialized FACT 10R | Pinarello X9 |
| Fork | Specialized Future Shock 3.2 | not listed |
| Shifter | Shimano 105 | Shimano Dura-Ace R9200 |
| Derailleur | Shimano 105 | Shimano Dura-Ace R9200 |
| Cassette | Shimano 105 | not listed |
| Chain | Shimano 105 | Shimano CN-HG |
| Crankset | Shimano 105 | Shimano Dura-Ace |
| Chainring | Shimano 105 | not listed |
| Bottom bracket | Shimano 105 | Shimano SM-BB9200 Dura Ace |
| Wheelset | DT Swiss G540 | MOST Ultrafast 40 |
| Tire | S Works Mondo, S Works Mondo 2BR | Pirelli P ZERO Race TLR |
| Brake | Shimano 105 | Shimano Dura-Ace R9200, Shimano Dura-Ace R9100 |
| Rotor | Shimano 105 | not listed |
| Handlebar | Specialized Hover | MOST Talon Ultra Light |
| Stem | Specialized Future Stem | not listed |
| Bar tape | Supacaz Super Sticky Kush | MOST Bar Tape |
| Seatpost | Specialized S-Works Pavé | Pinarello Aero Seatpost |
| Saddle | Specialized Body Geometry Power Sport | not listed |
| Bottle cage | not listed | Trap PACF |
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