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: Orbea Orca Aero M30i LTD or Specialized Tarmac SL9?

The frame front of Specialized Tarmac SL9 is slightly higher, by about 6 mm. That difference alone does not settle your position.

Orbea Orca Aero M30i LTD 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 are close, a few millimetres apart. The frame alone will not decide this; use your measurements to see which size and setup gets nearer to your position on each bike.

Compare them for me Compare geometry and sizes

In one look

Orbea Orca Aero M30i LTD: race geometry. Specialized Tarmac SL9: race geometry.

The frame front of Specialized Tarmac SL9 is slightly higher, by about 6 mm. That difference alone does not settle your position.
The forward length of the frame is nearly the same across matched sizes.

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; Orbea Orca Aero M30i LTD 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 • race geometry: Orbea Orca Aero M30i LTD; Size guide and geometry for the Orbea Orca Aero M30i LTD
2026 • race geometry: Specialized Tarmac SL9; Size guide and geometry for the Specialized Tarmac SL9

What do you need from this comparison?

Start with the decision you are making. We will ask only for the details needed to answer it.

Step 1/1

What are you trying to understand?

Your answer decides which questions follow and what the result focuses on.

Fit and size differences

The matched frame measurements differ by only a few millimetres, so stem and spacer choices can matter more than the frame.

Typical difference across matched sizes: frame front height 6 mm, forward length 0 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 Orbea Orca Aero M30i LTD and Specialized Tarmac SL9 sizes compare?

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

Orbea Orca Aero M30i LTD: 47; Stack 495, Reach 370
Specialized Tarmac SL9: 44; Stack 501, Reach 366

Stack: 6 mm taller

Reach: 4 mm shorter

Orbea Orca Aero M30i LTD: 49; Stack 504, Reach 375
Specialized Tarmac SL9: 49; Stack 514, Reach 375

Stack: 10 mm taller

Reach: practically identical

Orbea Orca Aero M30i LTD: 51; Stack 520, Reach 380
Specialized Tarmac SL9: 52; Stack 527, Reach 380

Stack: 7 mm taller

Reach: practically identical

Orbea Orca Aero M30i LTD: 53; Stack 540, Reach 385
Specialized Tarmac SL9: 54; Stack 544, Reach 384

Stack: 4 mm taller

Reach: practically identical

Orbea Orca Aero M30i LTD: 55; Stack 560, Reach 390
Specialized Tarmac SL9: 56; Stack 565, Reach 395

Stack: 5 mm taller

Reach: 5 mm longer

Orbea Orca Aero M30i LTD: 57; Stack 578, Reach 397
Specialized Tarmac SL9: 56; Stack 565, Reach 395

Stack: 13 mm lower

Reach: practically identical

Orbea Orca Aero M30i LTD: 60; Stack 604, Reach 404
Specialized Tarmac SL9: 61; Stack 612, Reach 408

Stack: 8 mm taller

Reach: 4 mm longer

Orbea Orca Aero M30i LTD	Specialized Tarmac SL9	The position will feel
47Stack 495 · Reach 370	44Stack 501 · Reach 366	Stack: 6 mm taller · Reach: 4 mm shorter
49Stack 504 · Reach 375	49Stack 514 · Reach 375	Stack: 10 mm taller · Reach: practically identical
51Stack 520 · Reach 380	52Stack 527 · Reach 380	Stack: 7 mm taller · Reach: practically identical
53Stack 540 · Reach 385	54Stack 544 · Reach 384	Stack: 4 mm taller · Reach: practically identical
55Stack 560 · Reach 390	56Stack 565 · Reach 395	Stack: 5 mm taller · Reach: 5 mm longer
57Stack 578 · Reach 397	56Stack 565 · Reach 395	Stack: 13 mm lower · Reach: practically identical
60Stack 604 · Reach 404	61Stack 612 · Reach 408	Stack: 8 mm taller · Reach: 4 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: Orbea Orca Aero M30i LTD or Specialized Tarmac SL9?: The frame front of Specialized Tarmac SL9 is slightly higher, by about 6 mm. That difference alone does not settle your position.

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