2018 Trek Domane ALR Disc vs 2020 Specialized Roubaix Sport
The 54 is the Specialized Roubaix Sport size closest to your 56 Trek Domane ALR Disc. 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 Specialized Roubaix Sport
Compared with the Trek Domane ALR Disc in 56, the Specialized Roubaix Sport in 54 places the top of the head tube 6 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 30 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- −1 mm
- About the same reach
- Wheelbase
- −30 mm
- Shorter: quicker to change direction
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- −5 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek Domane ALR Disc numbers we have for size 56 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane ALR Disc 56 | Specialized Roubaix Sport 54 | Difference |
|---|---|---|---|
| Reach | 377 | 376mm | −1 mm |
| Stack | 591 | 585mm | −6 mm |
| Head tube angle | 71.9° | 72.75° | +0.8° |
| Effective top tube | 554 | not listed | |
| Chainstay length | 420 | 415mm | −5 mm |
| Wheelbase | 1018 | 988mm | −30 mm |
| BB drop | 78 | 76mm | −2 mm |
| Standover | 776 | 762mm | −14 mm |
| Seat tube length | 525 | 465mm | −60 mm |
| Head tube length | 175 | 125mm | −50 mm |
| Seat tube angle | not listed | 74° | |
| BB height | not listed | 266mm | |
| Fork length | not listed | 370mm |
Differences are the Specialized Roubaix Sport minus the Trek Domane ALR Disc. Full charts: 2018 Trek Domane ALR Disc, 2020 Specialized Roubaix Sport.
Where each sits in its class
Trek Domane ALR DiscSpecialized Roubaix Sport
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 | Trek Domane ALR DiscALR 4 Disc | Specialized Roubaix SportSport |
|---|---|---|
| Frame | Trek Alpha | not listed |
| Fork | Trek Domane | Specialized Future Shock 1.5 |
| Shifter | Shimano RS405 | Shimano 105 R7020 |
| Derailleur | Shimano Tiagra | Shimano 105, Shimano 105 R7000 GS |
| Cassette | Shimano Tiagra | Shimano 105 |
| Chain | Shimano Tiagra | KMC X11 Extra |
| Crankset | Shimano Tiagra | Praxis Alba |
| Bottom bracket | Trek BB86.5 | not listed |
| Tire | Bontrager R1 | Specialized Turbo Pro |
| Hub | Bontrager centerlock | not listed |
| Brake | Shimano RS505 | Shimano 105 |
| Handlebar | Bontrager VR-C | Specialized Hover |
| Saddle | Bontrager Affinity | Specialized Power Sport |
| Wheelset | not listed | DT Swiss R470 |
| Seatpost | not listed | Specialized S-Works Pave |
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