2021 Giant Defy Advanced Pro vs 2023 Specialized Roubaix SL8 Comp
The 56 is the Specialized Roubaix SL8 Comp size closest to your L Giant Defy Advanced Pro. 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 Specialized Roubaix SL8 Comp
Compared with the Giant Defy Advanced Pro in L, the Specialized Roubaix SL8 Comp in 56 places the top of the head tube at about the same height and about as far forward, relative to the bottom bracket.
- Frame stack
- ±0 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
- n/a
- One of the bikes has no number for this
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Giant Defy Advanced Pro numbers we have for size L are missing the head angle, seat angle, chainstay length and wheelbase. The numbers below still compare.
Geometry side by side
| Measurement | Giant Defy Advanced Pro L | Specialized Roubaix SL8 Comp 56 | Difference |
|---|---|---|---|
| Reach | 390 | 389 | −1 mm |
| Stack | 605 | 605 | ±0 mm |
| Head tube angle | not listed | 73 | |
| Seat tube angle | not listed | 73.5 | |
| Effective top tube | not listed | 569 | |
| Chainstay length | not listed | 420 | |
| Wheelbase | not listed | 1012 | |
| BB height | not listed | 270 | |
| Standover | not listed | 787 | |
| Seat tube length | not listed | 485 | |
| Head tube length | not listed | 140 |
Differences are the Specialized Roubaix SL8 Comp minus the Giant Defy Advanced Pro. Full charts: 2021 Giant Defy Advanced Pro, 2023 Specialized Roubaix SL8 Comp.
Where each sits in its class
Giant Defy Advanced ProSpecialized Roubaix SL8 Comp
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 | Giant Defy Advanced ProAdvanced Pro 2 | Specialized Roubaix SL8 CompSL8 Comp |
|---|---|---|
| Frame | Giant Defy | Specialized FACT 10R |
| Fork | Giant OverDrive 2 | Specialized Future Shock 3.2 |
| Shifter | Shimano Ultegra | Shimano 105 |
| Derailleur | Shimano Ultegra | Shimano 105 |
| Cassette | Shimano cassette | Shimano 105 |
| Chain | KMC X11SL-1 | Shimano 105 |
| Crankset | Shimano Ultegra Mid Compact | Shimano 105 |
| Wheelset | Giant SLR-2 42 | DT Swiss G540 |
| Tire | Giant Gavia Fondo 1 | S Works Mondo, S Works Mondo 2BR |
| Brake | Shimano Ultegra | Shimano 105 |
| Handlebar | Giant D-Fuse SLR | Specialized Hover |
| Stem | Giant Contact SL | Specialized Future Stem |
| Seatpost | Giant D-Fuse SLR | Specialized S-Works Pavé |
| Saddle | Giant Contact Fleet SL | Specialized Body Geometry Power Sport |
| Chainring | not listed | Shimano 105 |
| Bottom bracket | not listed | Shimano 105 |
| Rotor | not listed | Shimano 105 |
| Bar tape | not listed | Supacaz Super Sticky Kush |
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