2019 Trek FX Disc vs 2021 Giant Roam 4 Disc
The L is the Giant Roam 4 Disc size closest to your XXL Trek FX Disc. 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 Disc in XXL, the Giant Roam 4 Disc in L places the top of the head tube 16 mm lower and 24 mm further forward, relative to the bottom bracket. Its wheelbase is 44 mm longer, which can contribute to stability at speed.
- Frame stack
- −16 mm
- Lower front end
- Frame reach
- +24 mm
- Longer frame reach
- Wheelbase
- +44 mm
- Longer: steadier at speed
- Head angle
- −2.0°
- Slacker: calmer steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Trek FX Disc numbers we have for size XXL are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek FX Disc XXL | Giant Roam 4 Disc L | Difference |
|---|---|---|---|
| Reach | 392 | 416 | +24 mm |
| Stack | 650 | 634 | −16 mm |
| Head tube angle | 72.5° | 70.5° | −2.0° |
| Effective top tube | 603 | not listed | |
| Chainstay length | 445 | 450 | +5 mm |
| Wheelbase | 1065 | 1109 | +44 mm |
| BB drop | 62 | 62 | ±0 mm |
| BB height | 285 | not listed | |
| Standover | 877 | 788 | −89 mm |
| Seat tube length | 635 | 500 | −135 mm |
| Head tube length | 220 | 145 | −75 mm |
| Seat tube angle | not listed | 73.0° |
Differences are the Giant Roam 4 Disc minus the Trek FX Disc. Full charts: 2019 Trek FX Disc, 2021 Giant Roam 4 Disc.
Where each sits in its class
Trek FX DiscGiant 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 Disc2 Disc | Giant Roam 4 DiscRoam 4 Disc |
|---|---|---|
| Frame | Trek FX Alpha Gold | not listed |
| Shifter | Shimano Acera M310 | Shimano Altus |
| Derailleur | Shimano Tourney TY71, Shimano Acera M360 | Shimano Tourney, Shimano Altus |
| Cassette | Shimano HG31 | Shimano HG200 |
| Chain | KMC Z7 | KMC Z7 |
| Bottom bracket | VP BC73 | not listed |
| Pedals | Bontrager Satellite | not listed |
| Tire | Bontrager H2 | Giant Crosscut |
| Hub | Formula DC20, Formula DC22 | not listed |
| Rim | Bontrager Connection | not listed |
| Brake | Tektro HD-M275 | Tektro TKB-172 |
| Seatpost | Bontrager SSR | Giant D-Fuse |
| Fork | not listed | SR Suntour NEX |
| Wheelset | not listed | Giant GX03 |
| Handlebar | not listed | Giant Sport XC |
| Stem | not listed | Giant Sport |
| Saddle | not listed | Giant Sport Comfort |
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