Ridley Noah Fast 3.0 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

Ridley Noah Fast 3.0: race geometry. Specialized Tarmac SL9: race geometry.

  • The frame front of Specialized Tarmac SL9 is slightly higher, by about 4 mm. That difference alone does not settle your position.
  • The frame front of Specialized Tarmac SL9 is about 30 mm shorter. Handlebar position also depends on the stem and spacers.

These two split on bottom bracket; the sourced values are below. What each difference means for your size, your setup and the riding you describe is in the full comparison.

  • Bottom bracketDiffersSource 1Source 2
    Ridley Noah Fast 3.0
    Press fit
    Specialized Tarmac SL9
    Threaded

    A threaded bottom bracket is simpler to service and less prone to creaking; press fit saves weight and allows a wider shell.

  • Price

    Both start at a similar price level, going by the cheapest build you can buy of each.

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.

2025 • race geometry
Ridley Noah Fast 3.0
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 mm, forward length 30 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 Ridley Noah Fast 3.0 and Specialized Tarmac SL9 sizes compare?

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

Ridley Noah Fast 3.0
XXS
Stack 497, Reach 386
Specialized Tarmac SL9
44
Stack 501, Reach 366

Stack: 4 mm taller

Reach: 20 mm shorter

Ridley Noah Fast 3.0
XS
Stack 504, Reach 399
Specialized Tarmac SL9
49
Stack 514, Reach 375

Stack: 10 mm taller

Reach: 24 mm shorter

Ridley Noah Fast 3.0
S
Stack 521, Reach 410
Specialized Tarmac SL9
52
Stack 527, Reach 380

Stack: 6 mm taller

Reach: 30 mm shorter

Ridley Noah Fast 3.0
M
Stack 541, Reach 420
Specialized Tarmac SL9
54
Stack 544, Reach 384

Stack: 3 mm taller

Reach: 36 mm shorter

Ridley Noah Fast 3.0
L
Stack 565, Reach 428
Specialized Tarmac SL9
56
Stack 565, Reach 395

Stack: practically identical

Reach: 33 mm shorter

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: Ridley Noah Fast 3.0 or Specialized Tarmac SL9?
The frame front of Specialized Tarmac SL9 is slightly higher, by about 4 mm. That difference alone does not settle your position.

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