2017 Specialized Tarmac Disc vs 2015 Specialized Allez E5 Smartweld
The 58 is the Specialized Allez E5 Smartweld size closest to your 61 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 E5 Smartweld
Compared with the Specialized Tarmac Disc in 61, the Specialized Allez E5 Smartweld in 58 places the top of the head tube 6 mm lower and 6 mm further back, relative to the bottom bracket. Its wheelbase is 10 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- −6 mm
- Shorter frame reach
- Wheelbase
- −10 mm
- Shorter: quicker to change direction
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- −3 mm
- Shorter: livelier
The two frames
Specialized Tarmac Disc, 61Specialized Allez E5 Smartweld, 58Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac Disc 61 | Specialized Allez E5 Smartweld 58 | Difference |
|---|---|---|---|
| Reach | 408mm | 402mm | −6 mm |
| Stack | 612mm | 606mm | −6 mm |
| Head tube angle | 74° | 73.5° | −0.5° |
| Seat tube angle | 72.5° | 73° | +0.5° |
| Effective top tube | 600mm | 582mm | −18 mm |
| Chainstay length | 410mm | 407mm | −3 mm |
| Wheelbase | 1013mm | 1003mm | −10 mm |
| BB drop | 67.5mm | 67.5mm | ±0 mm |
| BB height | 274mm | not listed | |
| Standover | 850mm | 836mm | −14 mm |
| Seat tube length | 553mm | 540mm | −13 mm |
| Fork length | 368mm | not listed | |
| Head tube length | 210mm | 205mm | −5 mm |
Differences are the Specialized Allez E5 Smartweld minus the Specialized Tarmac Disc. Full charts: 2017 Specialized Tarmac Disc, 2015 Specialized Allez E5 Smartweld.
Where each sits in its class
Specialized Tarmac 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 DiscS-Works Disc | Specialized Allez E5 Smartweld |
|---|---|---|
| Shifter | Specialized C-clips | not listed |
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