2025 Trek Domane AL 4 Gen 4 vs 2027 Giant Contend AR
The M is the Giant Contend AR size closest to your 54 Trek Domane AL 4 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 4 Gen 4 in 54, the Giant Contend AR in M places the top of the head tube at about the same height and 6 mm further forward, relative to the bottom bracket.
- Frame stack
- −1 mm
- About the same height
- Frame reach
- +6 mm
- Longer frame reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- +0.7°
- Steeper: sharper steering
- Chainstays
- +2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Domane AL 4 Gen 4 numbers we have for size 54 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane AL 4 Gen 4 54 | Giant Contend AR M | Difference |
|---|---|---|---|
| Reach | 374 | 379.9 | +6 mm |
| Stack | 575 | 574.3 | −1 mm |
| Head tube angle | 71.3° | 72.0° | +0.7° |
| Effective top tube | 542 | not listed | |
| Chainstay length | 420 | 422 | +2 mm |
| Wheelbase | 1010 | 1010.6 | +1 mm |
| BB drop | 80 | 80 | ±0 mm |
| Standover | 754 | 770.1 | +16 mm |
| Seat tube length | 500 | 500 | ±0 mm |
| Head tube length | 160 | 150 | −10 mm |
| Seat tube angle | not listed | 73.5° |
Differences are the Giant Contend AR minus the Trek Domane AL 4 Gen 4. Full charts: 2025 Trek Domane AL 4 Gen 4, 2027 Giant Contend AR.
Where each sits in its class
Trek Domane AL 4 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 4 Gen 4Gen 4 | Giant Contend AR1 |
|---|---|---|
| Frame | Trek Domane AL | Giant ALUXX-SL Grade |
| Fork | Trek Domane AL | Giant Advanced-Grade |
| Shifter | Shimano Tiagra | Shimano CUES U6030 |
| Derailleur | Shimano Tiagra | Shimano CUES U6030, Shimano CUES U6000 |
| Cassette | Shimano HG500 | Shimano CS-LG400 |
| Chain | Shimano HG54 Tiagra | KMC X11 |
| Crankset | Shimano Tiagra | Shimano CUES FC-U6030-1 |
| Chainring | Shimano Tiagra | not listed |
| Bottom bracket | Shimano RS501 | Shimano BB-RS501 |
| Wheelset | Bontrager Paradigm 23 | Giant P-AR |
| Tire | Bontrager Kwaremont Comp | Giant Gavia Fondo 2 |
| Hub | Formula RX-512, Formula RX-142 | not listed |
| Rim | Bontrager Paradigm SL | Giant P-AR |
| Brake | Shimano Tiagra | Shimano CUES U6030 F]160 R]160 |
| Rotor | Shimano SM-RT66 | not listed |
| Handlebar | Bontrager Comp | Giant Contact |
| Stem | Bontrager Elite | Giant Contact Aerolight |
| Bar tape | Bontrager Supertack Performance | Giant Cork Tape |
| Seatpost | Bontrager Comp | D-Fuse |
| Saddle | Bontrager Verse Short | Giant Approach |
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