2023 Specialized Roubaix SL8 Comp vs 2025 Giant Contend AR
The XL is the Giant Contend AR size closest to your 64 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 Giant Contend AR
Compared with the Specialized Roubaix SL8 Comp in 64, the Giant Contend AR in XL places the top of the head tube 47 mm lower and 9 mm further back, relative to the bottom bracket. Its wheelbase is 8 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −47 mm
- Lower front end
- Frame reach
- −9 mm
- Shorter frame reach
- Wheelbase
- −8 mm
- Shorter: quicker to change direction
- Head angle
- −1.0°
- Slacker: calmer steering
- Chainstays
- −1 mm
- About the same
The two frames
Specialized Roubaix SL8 Comp, 64Giant Contend AR, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Comp 64 | Giant Contend AR XL | Difference |
|---|---|---|---|
| Reach | 409 | 400 | −9 mm |
| Stack | 685 | 638 | −47 mm |
| Head tube angle | 73.5 | 72.5° | −1.0° |
| Seat tube angle | 73 | 73.0° | ±0.0° |
| Effective top tube | 618 | not listed | |
| Chainstay length | 423 | 422 | −1 mm |
| Wheelbase | 1054 | 1046 | −8 mm |
| BB height | 271 | not listed | |
| Standover | 865 | 856 | −9 mm |
| Seat tube length | 581 | 565 | −16 mm |
| Head tube length | 222 | 215 | −7 mm |
| BB drop | not listed | 80 |
Differences are the Giant Contend AR minus the Specialized Roubaix SL8 Comp. Full charts: 2023 Specialized Roubaix SL8 Comp, 2025 Giant Contend AR.
Where each sits in its class
Specialized Roubaix SL8 CompGiant Contend AR
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 | Giant Contend AR4 |
|---|---|---|
| Frame | Specialized FACT 10R | Giant ALUXX-grade |
| Fork | Specialized Future Shock 3.2 | Giant Advanced-Grade |
| Shifter | Shimano 105 | Shimano Claris |
| Derailleur | Shimano 105 | Shimano Claris |
| Cassette | Shimano 105 | Shimano CS-HG50 Deore |
| Chain | Shimano 105 | KMC Z72 |
| Crankset | Shimano 105 | FSA Tempo |
| Chainring | Shimano 105 | not listed |
| Bottom bracket | Shimano 105 | not listed |
| Wheelset | DT Swiss G540 | not listed |
| Tire | S Works Mondo, S Works Mondo 2BR | Giant S-R3 AC |
| Brake | Shimano 105 | Tektro MD-C550, Shimano Claris |
| Rotor | Shimano 105 | not listed |
| Handlebar | Specialized Hover | Giant Connect XS:40cm |
| Stem | Specialized Future Stem | Giant Sport XS:80mm |
| Bar tape | Supacaz Super Sticky Kush | not listed |
| Seatpost | Specialized S-Works Pavé | Giant D-Fuse |
| Saddle | Specialized Body Geometry Power Sport | Giant Approach |
| Rim | not listed | Giant S-R2 |
| Grips | not listed | Velo cork tape |
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