2017 Specialized Tarmac Pro Disc vs 2015 Specialized Allez E5 Smartweld
The 52 is the Specialized Allez E5 Smartweld size closest to your 49 Specialized Tarmac Pro 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 Allez E5 Smartweld
Compared with the Specialized Tarmac Pro Disc in 49, the Specialized Allez E5 Smartweld in 52 places the top of the head tube 19 mm higher and about as far forward, relative to the bottom bracket.
- Frame stack
- +19 mm
- Higher front end
- Frame reach
- −1 mm
- About the same reach
- Wheelbase
- ±0 mm
- About the same
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Tarmac Pro Disc, 49Specialized Allez E5 Smartweld, 52Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac Pro Disc 49 | Specialized Allez E5 Smartweld 52 | Difference |
|---|---|---|---|
| Reach | 386mm | 385mm | −1 mm |
| Stack | 504mm | 523mm | +19 mm |
| Head tube angle | 72.25° | 73° | +0.8° |
| Seat tube angle | 75.5° | 74° | −1.5° |
| Effective top tube | 518mm | 537mm | +19 mm |
| Chainstay length | 405mm | 405mm | ±0 mm |
| Wheelbase | 970mm | 970mm | ±0 mm |
| BB drop | 71.5mm | 71.5mm | ±0 mm |
| BB height | 270mm | not listed | |
| Standover | 730mm | 777mm | +47 mm |
| Seat tube length | 431mm | 480mm | +49 mm |
| Fork length | 368mm | not listed | |
| Head tube length | 100mm | 120mm | +20 mm |
Differences are the Specialized Allez E5 Smartweld minus the Specialized Tarmac Pro Disc. Full charts: 2017 Specialized Tarmac Pro Disc, 2015 Specialized Allez E5 Smartweld.
Where each sits in its class
Specialized Tarmac Pro DiscSpecialized Allez E5 Smartweld
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 Tarmac Pro DiscPro Disc Ultegra Di2 | Specialized Allez E5 Smartweld |
|---|---|---|
| Shifter | Shimano 105 R785 Di2 | not listed |
| Derailleur | Shimano Ultegra R6870 Di2, Shimano Ultegra Di2 | not listed |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano HG70 | not listed |
| Bottom bracket | Specialized Enduro | not listed |
| Wheelset | Roval CL 40 | not listed |
| Tire | Specialized S-Works Turbo | not listed |
| Brake | Shimano BR-785 | not listed |
| Saddle | Specialized Toupé Pro | not listed |
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