2024 Specialized Roubaix SL8 Sport vs 2025 Giant Contend AR
The XL is the Giant Contend AR size closest to your 64 Specialized Roubaix SL8 Sport. 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 Sport 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 Sport, 64Giant Contend AR, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Sport 64 | Giant Contend AR XL | Difference |
|---|---|---|---|
| Reach | 409mm | 400 | −9 mm |
| Stack | 685mm | 638 | −47 mm |
| Head tube angle | 73.5° | 72.5° | −1.0° |
| Seat tube angle | 73° | 73.0° | ±0.0° |
| Chainstay length | 423mm | 422 | −1 mm |
| Wheelbase | 1054mm | 1046 | −8 mm |
| BB drop | 78mm | 80 | +2 mm |
| BB height | 271mm | not listed | |
| Standover | 865mm | 856 | −9 mm |
| Seat tube length | 581mm | 565 | −16 mm |
| Fork length | 375mm | not listed | |
| Head tube length | 222mm | 215 | −7 mm |
Differences are the Giant Contend AR minus the Specialized Roubaix SL8 Sport. Full charts: 2024 Specialized Roubaix SL8 Sport, 2025 Giant Contend AR.
Where each sits in its class
Specialized Roubaix SL8 SportGiant 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 Sport | Giant Contend AR4 |
|---|---|---|
| Frame | not listed | Giant ALUXX-grade |
| Fork | not listed | Giant Advanced-Grade |
| Shifter | not listed | Shimano Claris |
| Derailleur | not listed | Shimano Claris |
| Cassette | not listed | Shimano CS-HG50 Deore |
| Chain | not listed | KMC Z72 |
| Crankset | not listed | FSA Tempo |
| Tire | not listed | Giant S-R3 AC |
| Rim | not listed | Giant S-R2 |
| Brake | not listed | Tektro MD-C550, Shimano Claris |
| Handlebar | not listed | Giant Connect XS:40cm |
| Stem | not listed | Giant Sport XS:80mm |
| Grips | not listed | Velo cork tape |
| Seatpost | not listed | Giant D-Fuse |
| Saddle | not listed | Giant Approach |
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