- Giant Fathom 29
- S
- Stack 622, Reach 425
- Specialized Epic 9
- S
- Stack 594, Reach 420
Stack: 28 mm lower
Reach: 5 mm shorter
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Giant Fathom 29 vs Specialized Epic 9: 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.
In one look
Giant Fathom 29: cross-country geometry. Specialized Epic 9: cross-country geometry.
- Across matched sizes, the frame front of Giant Fathom 29 is about 15 mm higher than Specialized Epic 9. This can support a more upright starting position, while stem and spacers still affect the handlebar.
- The frame front of Specialized Epic 9 is slightly longer, by about 8 mm.
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 Epic 9 is the dearer of the two, going by the cheapest build you can buy of each; Giant Fathom 29 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.
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
Geometry can separate these bikes: matched sizes create a meaningfully different position.
Typical difference across matched sizes: frame front height 15 mm, forward length 8 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 Giant Fathom 29 and Specialized Epic 9 sizes compare?
See the closest size matches and the differences in stack, reach, and riding position.
- Giant Fathom 29
- M
- Stack 622, Reach 445
- Specialized Epic 9
- M
- Stack 604, Reach 450
Stack: 18 mm lower
Reach: 5 mm longer
- Giant Fathom 29
- L
- Stack 631, Reach 470
- Specialized Epic 9
- L
- Stack 618, Reach 480
Stack: 13 mm lower
Reach: 10 mm longer
- Giant Fathom 29
- XL
- Stack 640, Reach 490
- Specialized Epic 9
- XL
- Stack 645, Reach 505
Stack: 5 mm taller
Reach: 15 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: Giant Fathom 29 or Specialized Epic 9?
- Across matched sizes, the frame front of Giant Fathom 29 is about 15 mm higher than Specialized Epic 9. This can support a more upright starting position, while stem and spacers still affect the handlebar.
TrainCraft plans
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