2026 Specialized Roubaix SL8 Expert vs 2026 Giant Contend AR
The M is the Giant Contend AR size closest to your 54 Specialized Roubaix SL8 Expert. 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 Expert in 54, the Giant Contend AR in M places the top of the head tube 10 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 10 mm longer, which can contribute to stability at speed.
- Frame stack
- +10 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +10 mm
- Longer: steadier at speed
- Head angle
- +0.2°
- About the same head angle
- Chainstays
- +2 mm
- About the same
The two frames
Specialized Roubaix SL8 Expert, 54Giant Contend AR, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Expert 54 | Giant Contend AR M | Difference |
|---|---|---|---|
| Reach | 381 | 383 | +2 mm |
| Stack | 585 | 595 | +10 mm |
| Head tube angle | 72.3 | 72.5 | +0.2° |
| Seat tube angle | 74 | 73.0 | −1.0° |
| Effective top tube | 550 | 565 | +15 mm |
| Chainstay length | 420 | 422 | +2 mm |
| Wheelbase | 1005 | 1015 | +10 mm |
| BB drop | 78 | 80 | +2 mm |
| BB height | 270 | not listed | |
| Standover | 766 | 810 | +44 mm |
| Seat tube length | 465 | 535 | +70 mm |
| Fork length | 375 | not listed | |
| Head tube length | 122 | not listed |
Differences are the Giant Contend AR minus the Specialized Roubaix SL8 Expert. Full charts: 2026 Specialized Roubaix SL8 Expert, 2026 Giant Contend AR.
Where each sits in its class
Specialized Roubaix SL8 ExpertGiant 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 ExpertSL8 Expert | Giant Contend ARAR 1 |
|---|---|---|
| Frame | Specialized Roubaix | Giant Contend |
| Fork | Specialized Future Shock 3.2 | Giant Advanced-Grade Composite, full-composite OverDrive steerer, 12x100mm thru-axle, disc |
| Shifter | Shimano Ultegra R8170 Di2 | Shimano 105 Di2 |
| Derailleur | Shimano Ultegra R8150 Di2, Shimano Ultegra R8150 | Shimano 105 Di2 |
| Cassette | Shimano Ultegra R8100 | Shimano 105 |
| Chain | Shimano XT M8100 | KMC X12L-1 |
| Crankset | Shimano Ultegra R8100 | Shimano 105 |
| Chainring | Shimano 50 105, Shimano 34 105 | not listed |
| Bottom bracket | Shimano Threaded BSA | Shimano BB-RS501 |
| Wheelset | Roval C38 | Giant P-R2 Disc |
| Tire | Specialized Mondo TLR Endurance | Giant Gavia Fondo 2 |
| Brake | Shimano Ultegra R8100 | Shimano 105 Di2 |
| Handlebar | Specialized Hover Expert | 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 Expert | 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
