2025 Trek Domane AL Gen 4 vs 2027 Giant Contend AR
The S is the Giant Contend AR size closest to your 52 Trek Domane AL Gen 4. 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 Contend AR
Compared with the Trek Domane AL Gen 4 in 52, the Giant Contend AR in S places the top of the head tube at about the same height and 4 mm further forward, relative to the bottom bracket.
- Frame stack
- −2 mm
- About the same height
- Frame reach
- +4 mm
- Longer frame reach
- Wheelbase
- −0 mm
- About the same
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- +2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Domane AL Gen 4 numbers we have for size 52 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane AL Gen 4 52 | Giant Contend AR S | Difference |
|---|---|---|---|
| Reach | 371 | 374.7 | +4 mm |
| Stack | 561 | 559.1 | −2 mm |
| Head tube angle | 71.3° | 71.8° | +0.5° |
| Effective top tube | 530 | not listed | |
| Chainstay length | 420 | 422 | +2 mm |
| Wheelbase | 1003 | 1002.8 | −0 mm |
| BB drop | 80 | 80 | ±0 mm |
| Standover | 735 | 743.7 | +9 mm |
| Seat tube length | 475 | 465 | −10 mm |
| Head tube length | 145 | 135 | −10 mm |
| Seat tube angle | not listed | 74.0° |
Differences are the Giant Contend AR minus the Trek Domane AL Gen 4. Full charts: 2025 Trek Domane AL Gen 4, 2027 Giant Contend AR.
Where each sits in its class
Trek Domane AL Gen 4Giant Contend AR
Each bike is ranked against the other road 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 Domane AL Gen 4AL 2 Gen 4 | Giant Contend AR1 |
|---|---|---|
| Fork | Trek Domane AL | Giant Advanced-Grade |
| Wheelset | Bontrager Paradigm 23 | Giant P-AR |
| Tire | Bontrager Kwaremont Comp | Giant Gavia Fondo 2 |
| Frame | not listed | Giant ALUXX-SL Grade |
| Shifter | not listed | Shimano CUES U6030 |
| Derailleur | not listed | Shimano CUES U6030, Shimano CUES U6000 |
| Cassette | not listed | Shimano CS-LG400 |
| Chain | not listed | KMC X11 |
| Crankset | not listed | Shimano CUES FC-U6030-1 |
| Bottom bracket | not listed | Shimano BB-RS501 |
| Rim | not listed | Giant P-AR |
| Brake | not listed | Shimano CUES U6030 F]160 R]160 |
| Handlebar | not listed | Giant Contact |
| Stem | not listed | Giant Contact Aerolight |
| Bar tape | not listed | Giant Cork Tape |
| Seatpost | not listed | D-Fuse |
| Saddle | not listed | Giant Approach |
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