2015 Specialized Allez Pro vs 2017 Specialized Tarmac Pro
The 61 is the Specialized Tarmac Pro size closest to your 58 Specialized Allez 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 Tarmac Pro
Compared with the Specialized Allez Pro in 58, the Specialized Tarmac Pro in 61 places the top of the head tube 6 mm higher and 6 mm further forward, relative to the bottom bracket. Its wheelbase is 10 mm longer, which can contribute to stability at speed.
- Frame stack
- +6 mm
- Higher front end
- Frame reach
- +6 mm
- Longer frame reach
- Wheelbase
- +10 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Specialized Allez Pro, 58Specialized Tarmac Pro, 61Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Allez Pro 58 | Specialized Tarmac Pro 61 | Difference |
|---|---|---|---|
| Reach | 402mm | 408mm | +6 mm |
| Stack | 606mm | 612mm | +6 mm |
| Head tube angle | 73.5° | 74° | +0.5° |
| Seat tube angle | 73° | 72.5° | −0.5° |
| Effective top tube | 582mm | 600mm | +18 mm |
| Chainstay length | 407mm | 410mm | +3 mm |
| Wheelbase | 1003mm | 1013mm | +10 mm |
| BB drop | 67.5mm | 67.5mm | ±0 mm |
| Standover | 836mm | 850mm | +14 mm |
| Seat tube length | 540mm | 553mm | +13 mm |
| Head tube length | 205mm | 210mm | +5 mm |
| BB height | not listed | 274mm | |
| Fork length | not listed | 368mm |
Differences are the Specialized Tarmac Pro minus the Specialized Allez Pro. Full charts: 2015 Specialized Allez Pro, 2017 Specialized Tarmac Pro.
Where each sits in its class
Specialized Allez ProSpecialized Tarmac Pro
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 Allez ProPro | Specialized Tarmac ProPro |
|---|---|---|
| Shifter | SRAM RED 22 | not listed |
| Derailleur | SRAM Force 22, SRAM RED 22 | not listed |
| Cassette | SRAM PG-1170 | not listed |
| Chain | SRAM 1170 | not listed |
| Crankset | SRAM Force22 | not listed |
| Wheelset | Fulcrum S3 | not listed |
| Tire | Specialized Turbo Pro | not listed |
| Brake | SRAM Force, SRAM Red 22 | not listed |
| Saddle | Specialized Toupe Expert | not listed |
| Bottom bracket | not listed | Praxis 6806 |
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