2025 Giant Fathom vs 2024 Trek Roscoe
The ML is the Trek Roscoe size closest to your M Giant Fathom. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Trek Roscoe
Compared with the Giant Fathom in M, the Trek Roscoe in ML places the top of the head tube 17 mm higher and 10 mm further forward, relative to the bottom bracket. Its wheelbase is 21 mm longer, which can contribute to stability at speed.
- Frame stack
- +17 mm
- Higher front end
- Frame reach
- +10 mm
- Longer frame reach
- Wheelbase
- +21 mm
- Longer: steadier at speed
- Head angle
- −1.0°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Giant Fathom numbers we have for size M are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Giant Fathom M | Trek Roscoe ML | Difference |
|---|---|---|---|
| Reach | 445 | 455 | +10 mm |
| Stack | 622 | 639 | +17 mm |
| Head tube angle | 66 | 65.0° | −1.0° |
| Seat tube angle | 75 | 74.7° | −0.3° |
| Wheelbase | 1177 | 1198 | +21 mm |
| Seat tube length | 430 | 435 | +5 mm |
| Effective top tube | not listed | 630 | |
| Chainstay length | not listed | 430 | |
| BB drop | not listed | 61 | |
| BB height | not listed | 322 | |
| Standover | not listed | 742 | |
| Head tube length | not listed | 105 |
Differences are the Trek Roscoe minus the Giant Fathom. Full charts: 2025 Giant Fathom, 2024 Trek Roscoe.
Where each sits in its class
Giant FathomTrek Roscoe
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Giant Fathom1 | Trek Roscoe |
|---|---|---|
| Frame | Giant Fathom | not listed |
| Fork | Giant Crest 34 | not listed |
| Shifter | SRAM SX Eagle | not listed |
| Derailleur | SRAM NX Eagle SX | not listed |
| Cassette | SRAM PG-1150 SX | not listed |
| Chain | SRAM SX Eagle | not listed |
| Crankset | SRAM SX Eagle Powerspline | not listed |
| Chainring | SRAM SX Eagle | not listed |
| Bottom bracket | SRAM DUB GX | not listed |
| Wheelset | Giant AM | not listed |
| Tire | Maxxis Ardent Race | not listed |
| Brake | Shimano MT420, Shimano MT410 | not listed |
| Rotor | Shimano RT-26 | not listed |
| Handlebar | Giant Contact SL TR35 | not listed |
| Stem | Giant Contact SL | not listed |
| Dropper post | Giant Contact Switch | not listed |
| Saddle | Giant Romero | not listed |
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