2025
2025 Giant Fathom
The 2025 Giant Fathom sits more upright than most trail bikes. Reach 425 to 470 mm, stack 622 to 631 mm. The Fathom 1 build comes with SRAM NX Eagle SX shifting and Giant AM wheels.
Source: giant-bicycles.com. Checked .
Key facts
- Brand
- Giant
- Model
- Fathom
- Model year
- 2025
- Type
- Trail
- Geometry labels
- S, M, and L
- Drivetrain
- Varies by build
- Fork
- Varies by build
- Wheels
- Varies by build
- Geometry
- Complete for every size
- Source
- giant-bicycles.com
- Checked
Geometry by size
| Measurement | S | M | L |
|---|---|---|---|
| Reach(mm) | 425 | 445 | 470 |
| Stack(mm) | 622 | 622 | 631 |
| Head tube angle(°) | 66 | 66 | 66 |
| Seat tube angle(°) | 75 | 75 | 75 |
| Wheelbase(mm) | 1157 | 1177 | 1206 |
| Seat tube length(mm) | 380 | 430 | 465 |
✓Sources agree
Stock build
Fathom 1
Frame
Giant Fathom
Suspension
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
Keep your Fathom 1 in Quiver
Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.
Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.Already have Quiver? Open this build
Fathom 2
Frame
Giant Fathom
Suspension
Giant STL 34
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
Keep your Fathom 2 in Quiver
Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.
Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.Already have Quiver? Open this build
✓Sources agreeMManufacturer
Quick answers
- Which size or configuration labels have geometry for the 2025 Giant Fathom?
- Geometry is listed for S, M, and L.
- What are the reach and stack of the 2025 Giant Fathom in size M?
- In size M, reach is 445 mm and stack is 622 mm.
- What is the head tube angle of the 2025 Giant Fathom?
- The head tube angle is 66 degrees in every size.
- What does the 2025 Giant Fathom 1 ship with?
- The stock build includes Giant Fathom, Giant Crest 34, SRAM SX Eagle, and Giant AM.
- Which years of the Giant Fathom are on Quiver?
- Quiver has the Giant Fathom for 2025 and 2022.
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