This state-of-the-art aluminum material is made predominantly from 6011 alloy and delivers best-in-class strength-to-weight ratios. The frameset features unique welding technologies for a high-performance ride quality.
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Get your dose of singletrack on a fun hardtail that puts you in control. The combination of a lightweight hardtail frame, 130mm suspension fork and 27.5 wheels with wide rims and high-volume tires delivers loads of traction, speed and fun on the trail.
With its updated ALUXX SL aluminum frame, quick-handling 27.5 wheels and high-volume tires, Fathom is a great choice for technical terrain and singletrack shredding. It blends the efficient ride quality of a classic hardtail with the confident ride quality of larger tires that absorb bumps and give you more traction—so you can tackle rougher trails with total control. The frame is designed with trail-friendly geometry that includes a more relaxed head angle and a 130mm suspension fork.
Key Performance Factors
Trail Tuned Design
Balanced geometry with a 75-degree seattube angle puts the rider in a powerful pedaling position on the climbs, while a slacker 66-degree head angle boosts confidence and control on technical descents.ALUXX SL aluminum frameset is hand-built in-house by the world leader in aluminum engineering.
Responsive Handling
Lightweight ALUXX SL aluminum hardtail frame offers agile acceleration and maneuverability to help riders climb, corner and hammer the flats with efficiency and speed.
Smooth Control
Giant Crest 34 suspension fork with 130mm of travel absorbs roots, rocks and ruts. Grippy, high-volume tires boost traction on rugged terrain. And a dropper seatpost with handlebar remote lets you adjust saddle height on the fly for confident positioning on changing terrain.
Highlights
Built on a lightweight ALUXX SL aluminum frameset with progressive trail geometry, this hardtail features 27.5-inch wheels with grippy, high-volume 2.6-inch tires. It has a number of trail-specific features including a 130mm suspension fork and dropper seatpost. Here’s a look at Fathom’s key technologies:
Sizing Guide and Geometry
Sizing to be used as a reference only. Please check with a local authorized dealer to determine the correct size.
Available sizes may vary from country to country.
- S
- 163 cm5’4”
172 cm5’8”
- M
- 171 cm5’7” 180 cm5’11”
- L
- 179 cm5’10” 188 cm6’2”
- XL
- 187 cm6’2” 198 cm6’6”
| S | M | L | XL | ||
|---|---|---|---|---|---|
| A | Seat Tube Length (mm) (inch) | 38015 | 43016,9 | 46518,3 | 49519,5 |
| B | Seat Tube Angle (degrees) | 75,0° | 75,0° | 75,0° | 75,0° |
| C | Top Tube Length (mm) (inch) | 59223,3 | 61224,1 | 63925,2 | 66226,1 |
| D | Head Tube Length (mm) (inch) | 953,7 | 953,7 | 1054,1 | 1154,5 |
| E | Head Tube Angle (degrees) | 66,0° | 66,0° | 66,0° | 66,0° |
| F | Fork Rake (mm) (inch) | 441,7 | 441,7 | 441,7 | 441,7 |
| G | Trail (mm) (inch) | 1134,4 | 1134,4 | 1134,4 | 1134,4 |
| H | Wheelbase (mm) (inch) | 115445,4 | 117446,2 | 120347,4 | 122748,3 |
| I | Chain Stay Length (mm) (inch) | 43517,1 | 43517,1 | 43517,1 | 43517,1 |
| J | Bottom Bracket Drop (mm) (inch) | 602,4 | 602,4 | 602,4 | 602,4 |
| K | Stack (mm) (inch) | 62224,5 | 62224,5 | 63124,8 | 64025,2 |
| L | Reach (mm) (inch) | 42516,7 | 44517,5 | 47018,5 | 49019,3 |
| M | Stand Over Height (mm) (inch) | 71228 | 72628,6 | 74629,4 | 77130,4 |
| N | Handlebar Width (mm) (inch) | 78030,7 | 78030,7 | 78030,7 | 78030,7 |
| O | Stem Length (mm) (inch) | 401,6 | 401,6 | 502 | 502 |
| P | Crank Length (mm) (inch) | 1656,5 | 1706,7 | 1706,7 | 1706,7 |
| Q | Wheel Size | 27.5" | 27.5" | 27.5" | 27.5" |
Techs & Features
ALUXX SL Aluminum Technology
This High-Performance level, state-of-the-art aluminum material is made predominantly from 6011 alloy and delivers best-in-class strength-to-weight ratios. These framesets also feature unique welding technologies for a high-performance ride quality.
OverDrive
Giant’s original oversized fork steerer tube technology. Designed to provide precise front-end steering performance, the system’s oversized headset bearings (1 1/4” lower and 1 1/8” upper for road, 1 1/2” lower and 1 1/8” upper for mountain) and tapered steerer tube work in conjunction to provide optimal steering stiffness.
Tubeless System
Fewer flat tires. Greater traction. Less rolling resistance and a smoother, faster ride. Giant’s Tubeless System makes it easier than ever to experience all these benefits.
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All specifications listed are subject to change without notice.