2015 Specialized Allez vs 2017 Specialized Tarmac Pro
The 61 is the Specialized Tarmac Pro size closest to your 58 Specialized Allez. 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 in 58, the Specialized Tarmac Pro in 61 places the top of the head tube 5 mm higher and 11 mm further forward, relative to the bottom bracket. Its wheelbase is 5 mm longer, which can contribute to stability at speed.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- +11 mm
- Longer frame reach
- Wheelbase
- +5 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Allez, 58Specialized Tarmac Pro, 61Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Allez 58 | Specialized Tarmac Pro 61 | Difference |
|---|---|---|---|
| Reach | 397mm | 408mm | +11 mm |
| Stack | 607mm | 612mm | +5 mm |
| Head tube angle | 73.5° | 74° | +0.5° |
| Seat tube angle | 73° | 72.5° | −0.5° |
| Effective top tube | 583mm | 600mm | +17 mm |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 1008mm | 1013mm | +5 mm |
| BB drop | 67.5mm | 67.5mm | ±0 mm |
| Standover | 834mm | 850mm | +16 mm |
| Seat tube length | 550mm | 553mm | +3 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. Full charts: 2015 Specialized Allez, 2017 Specialized Tarmac Pro.
Where each sits in its class
Specialized AllezSpecialized 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 AllezAllez | Specialized Tarmac ProPro |
|---|---|---|
| Shifter | Shimano Claris R2400 | not listed |
| Derailleur | Shimano Claris R2400 | not listed |
| Chain | KMC Z51 | not listed |
| Crankset | Shimano Claris | not listed |
| Wheelset | Specialized AXIS Classic | not listed |
| Tire | Specialized Espoir Sport | not listed |
| Saddle | Specialized Toupé Sport | not listed |
| Bottom bracket | not listed | Praxis 6806 |
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