2017 Trek Émonda ALR Pro vs 2016 Specialized Roubaix SL4 Expert Disc UDi2
The 52.0 is the Specialized Roubaix SL4 Expert Disc UDi2 size closest to your 52 Trek Émonda ALR 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 Specialized Roubaix SL4 Expert Disc UDi2
Compared with the Trek Émonda ALR Pro in 52, the Specialized Roubaix SL4 Expert Disc UDi2 in 52.0 places the top of the head tube at about the same height and about as far forward, relative to the bottom bracket. Its wheelbase is 13 mm longer, which can contribute to stability at speed.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- +13 mm
- Longer: steadier at speed
- Head angle
- −0.8°
- Slacker: calmer steering
- Chainstays
- +2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Émonda ALR Pro numbers we have for size 52 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Émonda ALR Pro 52 | Specialized Roubaix SL4 Expert Disc UDi2 52.0 | Difference |
|---|---|---|---|
| Reach | 379 | 379 | ±0 mm |
| Stack | 547 | 547 | ±0 mm |
| Head tube angle | 72.8° | 72 | −0.8° |
| Effective top tube | 534 | 536 | +2 mm |
| Chainstay length | 410 | 412 | +2 mm |
| Wheelbase | 977 | 990 | +13 mm |
| BB drop | 72 | 73 | +1 mm |
| Standover | 729 | 756 | +27 mm |
| Seat tube length | 473 | 475 | +2 mm |
| Head tube length | 140 | 145 | +5 mm |
| Seat tube angle | not listed | 74 | |
| BB height | not listed | 269.5 | |
| Fork length | not listed | 368 |
Differences are the Specialized Roubaix SL4 Expert Disc UDi2 minus the Trek Émonda ALR Pro. Full charts: 2017 Trek Émonda ALR Pro, 2016 Specialized Roubaix SL4 Expert Disc UDi2.
Where each sits in its class
Trek Émonda ALR ProSpecialized Roubaix SL4 Expert Disc UDi2
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 Émonda ALR ProALR 6 Pro | Specialized Roubaix SL4 Expert Disc UDi2SL4 Expert Disc UDi2 |
|---|---|---|
| Frame | Trek Ultralight 300 | Specialized SL4 FACT |
| Shifter | Shimano Ultegra | Shimano 785 Di2 |
| Derailleur | Shimano Ultegra | Shimano Ultegra Di2 |
| Cassette | Shimano Ultegra | Shimano Ultegra |
| Crankset | Shimano Ultegra | Shimano Ultegra |
| Wheelset | Vision Metron 40 LTD | Fulcrum S-19 |
| Tire | Bontrager R2 Hard-Case Lite | Specialized Turbo Pro |
| Brake | Shimano Ultegra | Shimano BR-785 |
| Handlebar | Bontrager VR-C | Specialized Expert |
| Saddle | Bontrager Montrose | Specialized Phenom Expert |
| Fork | not listed | Specialized FACT carbon |
| Chain | not listed | Shimano Ultegra |
| Stem | not listed | Specialized Pro SL |
| Bar tape | not listed | Specialized CX Pro |
| Seatpost | not listed | Specialized CG-R |
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