2020 Trek FX vs 2021 Giant Roam 4 Disc
The S is the Giant Roam 4 Disc size closest to your M Trek FX. 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 in M, the Giant Roam 4 Disc in S places the top of the head tube 51 mm higher and 15 mm further forward, relative to the bottom bracket. Its wheelbase is 31 mm longer, which can contribute to stability at speed.
- Frame stack
- +51 mm
- Higher front end
- Frame reach
- +15 mm
- Longer frame reach
- Wheelbase
- +31 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +5 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Trek FX numbers we have for size M are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek FX M | Giant Roam 4 Disc S | Difference |
|---|---|---|---|
| Reach | 389 | 404 | +15 mm |
| Stack | 555 | 606 | +51 mm |
| Head tube angle | 70.5° | 70.5° | ±0.0° |
| Effective top tube | 548 | not listed | |
| Chainstay length | 445 | 450 | +5 mm |
| Wheelbase | 1057 | 1088 | +31 mm |
| BB drop | 62 | 62 | ±0 mm |
| BB height | 285 | not listed | |
| Standover | 735 | 725 | −10 mm |
| Seat tube length | 444 | 420 | −24 mm |
| Head tube length | 130 | 115 | −15 mm |
| Seat tube angle | not listed | 73.0° |
Differences are the Giant Roam 4 Disc minus the Trek FX. Full charts: 2020 Trek FX, 2021 Giant Roam 4 Disc.
Where each sits in its class
Trek FXGiant 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 FX1 | Giant Roam 4 DiscRoam 4 Disc |
|---|---|---|
| Frame | Trek FX Alpha Gold | not listed |
| Fork | Trek High-tensile | SR Suntour NEX |
| Shifter | Shimano Altus EF500 | Shimano Altus |
| Derailleur | Shimano Tourney TY51, Shimano Acera M310 | Shimano Tourney, Shimano Altus |
| Chain | KMC Z51 | KMC Z7 |
| Wheelset | Formula F21 | Giant GX03 |
| Tire | Bontrager H2 | Giant Crosscut |
| Hub | Formula FM21, Formula FM31 | not listed |
| Rim | Bontrager Connection | not listed |
| Seatpost | Bontrager SSR | Giant D-Fuse |
| Cassette | not listed | Shimano HG200 |
| Brake | not listed | Tektro TKB-172 |
| Handlebar | not listed | Giant Sport XC |
| Stem | not listed | Giant Sport |
| Saddle | not listed | Giant Sport Comfort |
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