2016 Specialized Roubaix SL4 Expert Disc UDi2 vs 2015 Trek Domane
The 50 is the Trek Domane size closest to your 52.0 Specialized Roubaix SL4 Expert Disc UDi2. 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 Trek Domane
Compared with the Specialized Roubaix SL4 Expert Disc UDi2 in 52.0, the Trek Domane in 50 places the top of the head tube at about the same height and 11 mm further back, relative to the bottom bracket. Its wheelbase is 6 mm longer, which can contribute to stability at speed.
- Frame stack
- −1 mm
- About the same height
- Frame reach
- −11 mm
- Shorter frame reach
- Wheelbase
- +6 mm
- Longer: steadier at speed
- Head angle
- −0.9°
- Slacker: calmer steering
- Chainstays
- +8 mm
- Longer: more planted
The two frames
Specialized Roubaix SL4 Expert Disc UDi2, 52.0Trek Domane, 50Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL4 Expert Disc UDi2 52.0 | Trek Domane 50 | Difference |
|---|---|---|---|
| Reach | 379 | 368 | −11 mm |
| Stack | 547 | 546 | −1 mm |
| Head tube angle | 72 | 71.1 | −0.9° |
| Seat tube angle | 74 | 74.6 | +0.6° |
| Effective top tube | 536 | 519 | −17 mm |
| Chainstay length | 412 | 420 | +8 mm |
| Wheelbase | 990 | 996 | +6 mm |
| BB drop | 73 | 80 | +7 mm |
| BB height | 269.5 | not listed | |
| Standover | 756 | 716 | −40 mm |
| Seat tube length | 475 | 450 | −25 mm |
| Fork length | 368 | not listed | |
| Head tube length | 145 | 130 | −15 mm |
Differences are the Trek Domane minus the Specialized Roubaix SL4 Expert Disc UDi2. Full charts: 2016 Specialized Roubaix SL4 Expert Disc UDi2, 2015 Trek Domane.
Where each sits in its class
Specialized Roubaix SL4 Expert Disc UDi2Trek Domane
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 SL4 Expert Disc UDi2SL4 Expert Disc UDi2 | Trek Domane |
|---|---|---|
| Frame | Specialized SL4 FACT | not listed |
| Fork | Specialized FACT carbon | not listed |
| Shifter | Shimano 785 Di2 | not listed |
| Derailleur | Shimano Ultegra Di2 | not listed |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano Ultegra | not listed |
| Crankset | Shimano Ultegra | not listed |
| Wheelset | Fulcrum S-19 | not listed |
| Tire | Specialized Turbo Pro | not listed |
| Brake | Shimano BR-785 | not listed |
| Handlebar | Specialized Expert | not listed |
| Stem | Specialized Pro SL | not listed |
| Bar tape | Specialized CX Pro | not listed |
| Seatpost | Specialized CG-R | not listed |
| Saddle | Specialized Phenom Expert | not listed |
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