2023 Salsa Timberjack Z2 27.5+ vs 2025 Giant Fathom 29
The S is the Giant Fathom 29 size closest to your XS Salsa Timberjack Z2 27.5+. 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 Giant Fathom 29
Compared with the Salsa Timberjack Z2 27.5+ in XS, the Giant Fathom 29 in S places the top of the head tube 23 mm higher and 14 mm further forward, relative to the bottom bracket. Its wheelbase is 37 mm longer, which can contribute to stability at speed.
- Frame stack
- +23 mm
- Higher front end
- Frame reach
- +14 mm
- Longer frame reach
- Wheelbase
- +37 mm
- Longer: steadier at speed
- Head angle
- −0.4°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Salsa Timberjack Z2 27.5+ is drawn. The Giant Fathom 29 numbers we have for size S are missing the chainstay length.
Geometry side by side
| Measurement | Salsa Timberjack Z2 27.5+ XS | Giant Fathom 29 S | Difference |
|---|---|---|---|
| Reach | 410.7 | 425 | +14 mm |
| Stack | 599.0 | 622 | +23 mm |
| Head tube angle | 66.4 | 66 | −0.4° |
| Seat tube angle | 75.1 | 75 | −0.1° |
| Effective top tube | 570.0 | 592 | +22 mm |
| Chainstay length | 420.0 | not listed | |
| Wheelbase | 1120.0 | 1157 | +37 mm |
| BB drop | 56.6 | not listed | |
| Standover | 702.9 | 727 | +24 mm |
| Seat tube length | 342.9 | 380 | +37 mm |
| Fork length | 543.0 | not listed | |
| Head tube length | 100.0 | not listed | |
| BB height | not listed | 314 |
Differences are the Giant Fathom 29 minus the Salsa Timberjack Z2 27.5+. Full charts: 2023 Salsa Timberjack Z2 27.5+, 2025 Giant Fathom 29.
Where each sits in its class
Salsa Timberjack Z2 27.5+Giant Fathom 29
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 | Salsa Timberjack Z2 27.5+ | Giant Fathom 29Fathom 29 |
|---|---|---|
| Frame | not listed | Giant Fathom 29 |
| Fork | not listed | Giant STL 34 |
| Shifter | not listed | Shimano CUES SL-6000 |
| Derailleur | not listed | Shimano CUES U6000 |
| Cassette | not listed | Shimano CS-LG300 |
| Chain | not listed | KMC X11 |
| Crankset | not listed | Shimano CUES U6000 |
| Chainring | not listed | Shimano CUES U6030 |
| Wheelset | not listed | Giant AM 29 |
| Tire | not listed | Maxxis Minion DHF, Maxxis Aggressor |
| Brake | not listed | Shimano MT420 |
| Rotor | not listed | Shimano RT-26 |
| Handlebar | not listed | Giant Contact SL TR35 |
| Stem | not listed | Giant Contact SL 35 |
| Grips | not listed | Giant Sole-O |
| Dropper post | not listed | Giant Contact Switch AT |
| Saddle | not listed | Giant Romero |
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