2015 Specialized Tarmac Pro Disc Race vs 2015 Specialized Allez E5 Smartweld
The 52 is the Specialized Allez E5 Smartweld size closest to your 49 Specialized Tarmac Pro Disc Race. 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 Race 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 Race, 49Specialized Allez E5 Smartweld, 52Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac Pro Disc Race 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 |
| Standover | 730mm | 777mm | +47 mm |
| Seat tube length | 431mm | 480mm | +49 mm |
| Head tube length | 100mm | 120mm | +20 mm |
Differences are the Specialized Allez E5 Smartweld minus the Specialized Tarmac Pro Disc Race. Full charts: 2015 Specialized Tarmac Pro Disc Race, 2015 Specialized Allez E5 Smartweld.
Where each sits in its class
Specialized Tarmac Pro Disc RaceSpecialized 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 Disc RacePro Disc Race | Specialized Allez E5 Smartweld |
|---|---|---|
| Shifter | Shimano 685 | not listed |
| Derailleur | Shimano Ultegra | not listed |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano Ultegra | not listed |
| Wheelset | Roval Rapide CL 40 SCS | not listed |
| Tire | Specialized Turbo Pro | not listed |
| Brake | Shimano 785 | not listed |
| Saddle | Specialized Toupe Expert | not listed |
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