2018 Specialized Tarmac Disc vs 2020 Specialized Allez Sprint Disc
The 54.0 is the Specialized Allez Sprint Disc size closest to your 54 Specialized Tarmac 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 Sprint Disc
Compared with the Specialized Tarmac Disc in 54, the Specialized Allez Sprint Disc in 54.0 places the top of the head tube 6 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- +1 mm
- About the same reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Tarmac Disc, 54Specialized Allez Sprint Disc, 54.0Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac Disc 54 | Specialized Allez Sprint Disc 54.0 | Difference |
|---|---|---|---|
| Reach | 384mm | 385mm | +1 mm |
| Stack | 544mm | 538mm | −6 mm |
| Head tube angle | 73° | 73° | ±0.0° |
| Seat tube angle | 74° | 74° | ±0.0° |
| Effective top tube | 540mm | not listed | |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 978mm | 979mm | +1 mm |
| BB drop | 72mm | 69mm | −3 mm |
| BB height | 268mm | 271mm | +3 mm |
| Standover | 775mm | 764mm | −11 mm |
| Seat tube length | 481mm | 500mm | +19 mm |
| Fork length | 363mm | 363mm | ±0 mm |
| Head tube length | 143mm | 140mm | −3 mm |
Differences are the Specialized Allez Sprint Disc minus the Specialized Tarmac Disc. Full charts: 2018 Specialized Tarmac Disc, 2020 Specialized Allez Sprint Disc.
Where each sits in its class
Specialized Tarmac DiscSpecialized Allez Sprint Disc
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 DiscS-Works Disc | Specialized Allez Sprint DiscDisc |
|---|---|---|
| Frame | Specialized S-Works Tarmac SL6 | not listed |
| Seatpost | not listed | Specialized Allez Sprint |
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