2016 Specialized Roubaix SL4 Pro Disc Race UDi2 vs 2018 Specialized Allez Elite
The 52 is the Specialized Allez Elite size closest to your 52.0 Specialized Roubaix SL4 Pro Disc Race 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 Specialized Allez Elite
Compared with the Specialized Roubaix SL4 Pro Disc Race UDi2 in 52.0, the Specialized Allez Elite in 52 places the top of the head tube 5 mm higher and 3 mm further back, relative to the bottom bracket. Its wheelbase is 12 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- −3 mm
- Shorter frame reach
- Wheelbase
- −12 mm
- Shorter: quicker to change direction
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Specialized Roubaix SL4 Pro Disc Race UDi2, 52.0Specialized Allez Elite, 52Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Roubaix SL4 Pro Disc Race UDi2 52.0 | Specialized Allez Elite 52 | Difference |
|---|---|---|---|
| Reach | 379 | 376mm | −3 mm |
| Stack | 547 | 552mm | +5 mm |
| Head tube angle | 72 | 73° | +1.0° |
| Seat tube angle | 74 | 73.25° | −0.8° |
| Effective top tube | 536 | 542mm | +6 mm |
| Chainstay length | 412 | 415mm | +3 mm |
| Wheelbase | 990 | 978mm | −12 mm |
| BB drop | 73 | 77mm | +4 mm |
| BB height | 269.5 | 263mm | −7 mm |
| Standover | 756 | 755mm | −1 mm |
| Seat tube length | 475 | 490mm | +15 mm |
| Fork length | 368 | 375mm | +7 mm |
| Head tube length | 145 | 135mm | −10 mm |
Differences are the Specialized Allez Elite minus the Specialized Roubaix SL4 Pro Disc Race UDi2. Full charts: 2016 Specialized Roubaix SL4 Pro Disc Race UDi2, 2018 Specialized Allez Elite.
Where each sits in its class
Specialized Roubaix SL4 Pro Disc Race UDi2Specialized Allez Elite
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 Pro Disc Race UDi2SL4 Pro Disc Race UDi2 | Specialized Allez EliteElite |
|---|---|---|
| Frame | Specialized SL4 FACT | not listed |
| Fork | Specialized FACT carbon | not listed |
| Shifter | Shimano 785 Di2 | Shimano 105 |
| Derailleur | Shimano Ultegra Di2 | Shimano 105 Ez, Shimano 105 |
| Cassette | Shimano Ultegra | Shimano 105 |
| Chain | Shimano Ultegra | KMC X11 EL |
| Crankset | Specialized Pro | Praxis Alba 2D |
| Wheelset | Roval Rapide CL 40 | DT Swiss R460 |
| Tire | Specialized S-Works Turbo | Specialized Espoir Sport |
| Brake | Shimano BR-785 | Tektro Axis |
| 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 Pro | Specialized Toupé Sport |
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