Polygon Strattos C9 AXS vs Specialized Tarmac SL9: which bike is right for you?

Compare ride character, intended rider, geometry, and fit. Add your measurements to see which bike suits you better and which size to choose on each.

Fit verdict: the frame positions differ enough to matter. Compare the geometry below, then use your measurements to identify the safer size and setup.

Compare them for meCompare geometry and sizes

In one look

Polygon Strattos C9 AXS: endurance geometry. Specialized Tarmac SL9: race geometry.

  • The frame front of Polygon Strattos C9 AXS is slightly higher, by about 4.1 mm. That difference alone does not settle your position.
  • The frame front of Specialized Tarmac SL9 is about 12 mm longer. Handlebar position also depends on the stem and spacers.

The frame standards line up and we hold no sourced weight or performance claim that separates them. What is left to decide is your size and setup on each frame.

  • Price

    Specialized Tarmac SL9 is the dearer of the two, going by the cheapest build you can buy of each; Polygon Strattos C9 AXS starts lower.

Subjective findings from independent tests on stock or near-stock builds. Tyres, pressure and size change how a frame feels.

We compare differences at frame and model level. Components, current price, and availability depend on the exact build and seller.

2026 • endurance geometry
Polygon Strattos C9 AXS
Full size guide
2026 • race geometry
Specialized Tarmac SL9
Full size guide

Fit and size differences

Geometry can separate these bikes: matched sizes create a meaningfully different position.

Typical difference across matched sizes: frame front height 4.1 mm, forward length 12 mm.

For a personal answer, the fit-and-size path uses your measurements to show only the relevant frame sizes. The full chart remains available as a reference.

View geometry for every size

How do Polygon Strattos C9 AXS and Specialized Tarmac SL9 sizes compare?

See the closest size matches and the differences in stack, reach, and riding position.

Polygon Strattos C9 AXS
XXS
Stack 516.9, Reach 355
Specialized Tarmac SL9
49
Stack 514, Reach 375

Stack: 2.9 mm lower

Reach: 20 mm longer

Polygon Strattos C9 AXS
XS
Stack 531.1, Reach 360
Specialized Tarmac SL9
52
Stack 527, Reach 380

Stack: 4.1 mm lower

Reach: 20 mm longer

Polygon Strattos C9 AXS
S
Stack 544.3, Reach 369
Specialized Tarmac SL9
54
Stack 544, Reach 384

Stack: practically identical

Reach: 15 mm longer

Polygon Strattos C9 AXS
M
Stack 555, Reach 378
Specialized Tarmac SL9
54
Stack 544, Reach 384

Stack: 11 mm lower

Reach: 6 mm longer

Polygon Strattos C9 AXS
L
Stack 580, Reach 387
Specialized Tarmac SL9
56
Stack 565, Reach 395

Stack: 15 mm lower

Reach: 8 mm longer

Polygon Strattos C9 AXS
XL
Stack 605, Reach 396
Specialized Tarmac SL9
61
Stack 612, Reach 408

Stack: 7 mm taller

Reach: 12 mm longer

Polygon Strattos C9 AXS
XXL
Stack 630, Reach 405
Specialized Tarmac SL9
61
Stack 612, Reach 408

Stack: 18 mm lower

Reach: 3 mm longer

The same size label can create a different position on each frame. Stack and reach are one part of the decision; the personalized comparison connects them to your body and each bike’s ride character.

FAQ

Can the same rider take different sizes on these two bikes?
Yes. Frame labels are not standardized, so the same rider may need different sizes. This comparison deliberately avoids a generic matched-size answer and hands your measurements to Bike Fit instead.
Which frame has the higher front: Polygon Strattos C9 AXS or Specialized Tarmac SL9?
The frame front of Polygon Strattos C9 AXS is slightly higher, by about 4.1 mm. That difference alone does not settle your position.

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