2027 Giant Contend AR vs 2025 Trek Domane AL 4 Gen 4
The 58 is the Trek Domane AL 4 Gen 4 size closest to your L Giant Contend AR. 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 Trek Domane AL 4 Gen 4
Compared with the Giant Contend AR in L, the Trek Domane AL 4 Gen 4 in 58 places the top of the head tube 3 mm lower and 12 mm further back, relative to the bottom bracket. Its wheelbase is 9 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −3 mm
- Lower front end
- Frame reach
- −12 mm
- Shorter frame reach
- Wheelbase
- −9 mm
- Shorter: quicker to change direction
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- +3 mm
- Longer: more planted
The two frames
Only the Giant Contend AR is drawn. The Trek Domane AL 4 Gen 4 numbers we have for size 58 are missing the seat angle.
Geometry side by side
| Measurement | Giant Contend AR L | Trek Domane AL 4 Gen 4 58 | Difference |
|---|---|---|---|
| Reach | 392.2 | 380 | −12 mm |
| Stack | 614.4 | 611 | −3 mm |
| Head tube angle | 72.5° | 72.0° | −0.5° |
| Seat tube angle | 73.0° | not listed | |
| Chainstay length | 422 | 425 | +3 mm |
| Wheelbase | 1030.6 | 1022 | −9 mm |
| BB drop | 80 | 78 | −2 mm |
| Standover | 817 | 796 | −21 mm |
| Seat tube length | 555 | 548 | −7 mm |
| Head tube length | 190 | 195 | +5 mm |
| Effective top tube | not listed | 567 |
Differences are the Trek Domane AL 4 Gen 4 minus the Giant Contend AR. Full charts: 2027 Giant Contend AR, 2025 Trek Domane AL 4 Gen 4.
Where each sits in its class
Giant Contend ARTrek Domane AL 4 Gen 4
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 | Giant Contend AR1 | Trek Domane AL 4 Gen 4Gen 4 |
|---|---|---|
| Frame | Giant ALUXX-SL Grade | Trek Domane AL |
| Fork | Giant Advanced-Grade | Trek Domane AL |
| Shifter | Shimano CUES U6030 | Shimano Tiagra |
| Derailleur | Shimano CUES U6030, Shimano CUES U6000 | Shimano Tiagra |
| Cassette | Shimano CS-LG400 | Shimano HG500 |
| Chain | KMC X11 | Shimano HG54 Tiagra |
| Crankset | Shimano CUES FC-U6030-1 | Shimano Tiagra |
| Bottom bracket | Shimano BB-RS501 | Shimano RS501 |
| Wheelset | Giant P-AR | Bontrager Paradigm 23 |
| Tire | Giant Gavia Fondo 2 | Bontrager Kwaremont Comp |
| Rim | Giant P-AR | Bontrager Paradigm SL |
| Brake | Shimano CUES U6030 F]160 R]160 | Shimano Tiagra |
| Handlebar | Giant Contact | Bontrager Comp |
| Stem | Giant Contact Aerolight | Bontrager Elite |
| Bar tape | Giant Cork Tape | Bontrager Supertack Performance |
| Seatpost | D-Fuse | Bontrager Comp |
| Saddle | Giant Approach | Bontrager Verse Short |
| Chainring | not listed | Shimano Tiagra |
| Hub | not listed | Formula RX-512, Formula RX-142 |
| Rotor | not listed | Shimano SM-RT66 |
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