2021 Trek FX Gen 3 vs 2021 Giant Roam 4 Disc
The M is the Giant Roam 4 Disc size closest to your XL Trek FX Gen 3. 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 Roam 4 Disc
Compared with the Trek FX Gen 3 in XL, the Giant Roam 4 Disc in M places the top of the head tube at about the same height and 12 mm further forward, relative to the bottom bracket. Its wheelbase is 28 mm longer, which can contribute to stability at speed.
- Frame stack
- +2 mm
- About the same height
- Frame reach
- +12 mm
- Longer frame reach
- Wheelbase
- +28 mm
- Longer: steadier at speed
- Head angle
- −2.0°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Trek FX Gen 3 numbers we have for size XL are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek FX Gen 3 XL | Giant Roam 4 Disc M | Difference |
|---|---|---|---|
| Reach | 398 | 410 | +12 mm |
| Stack | 618 | 620 | +2 mm |
| Head tube angle | 72.5° | 70.5° | −2.0° |
| Effective top tube | 587 | not listed | |
| Chainstay length | 450 | 450 | ±0 mm |
| Wheelbase | 1070 | 1098 | +28 mm |
| BB drop | 65 | 62 | −3 mm |
| BB height | 296 | not listed | |
| Standover | 848 | 756 | −92 mm |
| Seat tube length | 572 | 460 | −112 mm |
| Head tube length | 190 | 130 | −60 mm |
| Seat tube angle | not listed | 73.0° |
Differences are the Giant Roam 4 Disc minus the Trek FX Gen 3. Full charts: 2021 Trek FX Gen 3, 2021 Giant Roam 4 Disc.
Where each sits in its class
Trek FX Gen 3Giant Roam 4 Disc
Each bike is ranked against the other gravel 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 | Trek FX Gen 31 Gen 3 | Giant Roam 4 DiscRoam 4 Disc |
|---|---|---|
| Frame | Trek Alpha Gold | not listed |
| Fork | Trek FX | SR Suntour NEX |
| Shifter | Shimano Altus EF500 | Shimano Altus |
| Derailleur | Shimano Tourney TY510, Shimano Acera M310 | Shimano Tourney, Shimano Altus |
| Cassette | SunRace MFM300 | Shimano HG200 |
| Chain | KMC Z7 | KMC Z7 |
| Bottom bracket | VP BC73 | not listed |
| Tire | Bontrager H2 | Giant Crosscut |
| Hub | Formula FM21, Formula FM31 | not listed |
| Rim | Bontrager Connection | not listed |
| Wheelset | not listed | Giant GX03 |
| Brake | not listed | Tektro TKB-172 |
| Handlebar | not listed | Giant Sport XC |
| Stem | not listed | Giant Sport |
| Seatpost | not listed | Giant D-Fuse |
| Saddle | not listed | Giant Sport Comfort |
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