2024 Specialized Roubaix SL8 Pro vs 2025 Giant Contend AR
The XL is the Giant Contend AR size closest to your 58 Specialized Roubaix SL8 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 Giant Contend AR
Compared with the Specialized Roubaix SL8 Pro in 58, the Giant Contend AR in XL places the top of the head tube 8 mm higher and 3 mm further 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
- Longer frame 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 Pro, 58Giant Contend AR, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Pro 58 | Giant Contend AR XL | Difference |
|---|---|---|---|
| Reach | 397mm | 400 | +3 mm |
| Stack | 630mm | 638 | +8 mm |
| Head tube angle | 73° | 72.5° | −0.5° |
| Seat tube angle | 73.5° | 73.0° | −0.5° |
| Chainstay length | 423mm | 422 | −1 mm |
| Wheelbase | 1031mm | 1046 | +15 mm |
| BB drop | 78mm | 80 | +2 mm |
| BB height | 271mm | not listed | |
| Standover | 809mm | 856 | +47 mm |
| Seat tube length | 505mm | 565 | +60 mm |
| Fork length | 375mm | not listed | |
| Head tube length | 168mm | 215 | +47 mm |
Differences are the Giant Contend AR minus the Specialized Roubaix SL8 Pro. Full charts: 2024 Specialized Roubaix SL8 Pro, 2025 Giant Contend AR.
Where each sits in its class
Specialized Roubaix SL8 ProGiant 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 ProSL8 Pro | Giant Contend AR4 |
|---|---|---|
| Fork | Specialized Future Shock 3.3 | Giant Advanced-Grade |
| Shifter | SRAM Force eTap AXS | Shimano Claris |
| Derailleur | SRAM Force eTAP AXS | Shimano Claris |
| Cassette | SRAM XG-1270 | Shimano CS-HG50 Deore |
| Chain | SRAM Force | KMC Z72 |
| Crankset | SRAM Force AXS | FSA Tempo |
| Bottom bracket | SRAM DUB | not listed |
| Wheelset | Roval Terra CL II | not listed |
| Tire | Specialized S-Works Mondo 2BR | Giant S-R3 AC |
| Brake | SRAM Force | Tektro MD-C550, Shimano Claris |
| Stem | Specialized Future | Giant Sport XS:80mm |
| Seatpost | Specialized S-Works Pave Seat post | Giant D-Fuse |
| Saddle | Specialized Power | Giant Approach |
| Frame | not listed | Giant ALUXX-grade |
| Rim | not listed | Giant S-R2 |
| Handlebar | not listed | Giant Connect XS:40cm |
| Grips | not listed | Velo cork tape |
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