2025 Specialized Roubaix SL8 Comp vs 2026 Giant Contend AR
The L is the Giant Contend AR size closest to your 58 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 58, the Giant Contend AR in L 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 Comp, 58Giant Contend AR, LDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Comp 58 | Giant Contend AR L | Difference |
|---|---|---|---|
| Reach | 397 | 400 | +3 mm |
| Stack | 630 | 638 | +8 mm |
| Head tube angle | 73 | 72.5 | −0.5° |
| Seat tube angle | 73.5 | 73.0 | −0.5° |
| Effective top tube | 584 | 595 | +11 mm |
| Chainstay length | 423 | 422 | −1 mm |
| Wheelbase | 1031 | 1046 | +15 mm |
| BB drop | 78 | 80 | +2 mm |
| BB height | 271 | not listed | |
| Standover | 809 | 856 | +47 mm |
| Seat tube length | 505 | 585 | +80 mm |
| Fork length | 375 | not listed | |
| Head tube length | 168 | not listed |
Differences are the Giant Contend AR minus the Specialized Roubaix SL8 Comp. Full charts: 2025 Specialized Roubaix SL8 Comp, 2026 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 ARAR 1 |
|---|---|---|
| Frame | Specialized FACT 10R | Giant Contend |
| Fork | Specialized Future Shock 3.2 | Giant Advanced-Grade Composite, full-composite OverDrive steerer, 12x100mm thru-axle, disc |
| Shifter | Shimano 105 R7170 | Shimano 105 Di2 |
| Derailleur | Shimano 105 R7170 Di2, Shimano 105 R7150 Di2 | Shimano 105 Di2 |
| Cassette | Shimano 105 | Shimano 105 |
| Chain | Shimano 105 | KMC X12L-1 |
| Crankset | Shimano 105 | Shimano 105 |
| Bottom bracket | Shimano BSA | Shimano BB-RS501 |
| Wheelset | DT Swiss G540 | Giant P-R2 Disc |
| Tire | Specialized S-Works Mondo 2BR | Giant Gavia Fondo 2 |
| Brake | Shimano 105 | Shimano 105 Di2 |
| Handlebar | Specialized Hover | Giant D-Fuse SL |
| Stem | Specialized Future | Giant Contact |
| Grips | Supacaz Super Sticky Kush | Velo Cork tape with gel |
| Seatpost | Specialized S-Works Pave | Giant D-Fuse |
| Saddle | Specialized Power Sport | Giant Approach |
| Rotor | not listed | Giant MPH |
| Headset | not listed | Giant OverDrive |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
