2025 Specialized Roubaix SL8 Sport vs 2027 Giant Contend AR
The XL is the Giant Contend AR size closest to your 58 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 58, the Giant Contend AR in XL places the top of the head tube 8 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 15 mm longer, which can contribute to stability at speed.
- Frame stack
- +8 mm
- Higher front end
- Frame reach
- +3 mm
- About the same reach
- Wheelbase
- +15 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- −1 mm
- About the same
The two frames
Specialized Roubaix SL8 Sport, 58Giant Contend AR, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Sport 58 | Giant Contend AR XL | Difference |
|---|---|---|---|
| Reach | 397mm | 399.9 | +3 mm |
| Stack | 630mm | 638.2 | +8 mm |
| Head tube angle | 73° | 72.5° | −0.5° |
| Seat tube angle | 73.5° | 73.0° | −0.5° |
| Effective top tube | 584mm | not listed | |
| Chainstay length | 423mm | 422 | −1 mm |
| Wheelbase | 1031mm | 1045.8 | +15 mm |
| BB drop | 78mm | 80 | +2 mm |
| BB height | 271mm | not listed | |
| Standover | 809mm | 843.9 | +35 mm |
| Seat tube length | 505mm | 585 | +80 mm |
| Fork length | 375mm | not listed | |
| Head tube length | 168mm | 215 | +47 mm |
Differences are the Giant Contend AR minus the Specialized Roubaix SL8 Sport. Full charts: 2025 Specialized Roubaix SL8 Sport, 2027 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 SportSL8 Sport | Giant Contend AR1 |
|---|---|---|
| Fork | Specialized Future Shock 3.1 | Giant Advanced-Grade |
| Shifter | Shimano 105 R7120 | Shimano CUES U6030 |
| Derailleur | Shimano 105, Shimano 105 R7100 mechanical | Shimano CUES U6030, Shimano CUES U6000 |
| Cassette | Shimano 105 | Shimano CS-LG400 |
| Chain | Shimano 105 | KMC X11 |
| Crankset | Shimano 105 | Shimano CUES FC-U6030-1 |
| Wheelset | DT Swiss G540 | Giant P-AR |
| Tire | Specialized S-Works Mondo 2BR | Giant Gavia Fondo 2 |
| Brake | Shimano 105 | Shimano CUES U6030 F]160 R]160 |
| Handlebar | Specialized Hover | Giant Contact |
| Stem | Specialized Future | Giant Contact Aerolight |
| Seatpost | Specialized S-Works Pave Seat post | D-Fuse |
| Saddle | Specialized Power Sport | Giant Approach |
| Frame | not listed | Giant ALUXX-SL Grade |
| Bottom bracket | not listed | Shimano BB-RS501 |
| Rim | not listed | Giant P-AR |
| Bar tape | not listed | Giant Cork Tape |
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