2026 Trek Domane SL Gen 4 vs 2025 Trek Domane AL 4 Gen 4
The Trek Domane AL 4 Gen 4 size closest to your 54 is the 54. Compare the 54 instead
What changes on the Trek Domane AL 4 Gen 4
Compared with the Trek Domane SL Gen 4 in 54, the Trek Domane AL 4 Gen 4 in 44 places the top of the head tube 65 mm lower and 14 mm further back, relative to the bottom bracket. Its wheelbase is 27 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −65 mm
- Lower front end
- Frame reach
- −14 mm
- Shorter frame reach
- Wheelbase
- −27 mm
- Shorter: quicker to change direction
- Head angle
- −1.0°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Trek Domane SL Gen 4 is drawn. The Trek Domane AL 4 Gen 4 numbers we have for size 44 are missing the seat angle.
Geometry side by side
| Measurement | Trek Domane SL Gen 4 54 | Trek Domane AL 4 Gen 4 44 | Difference |
|---|---|---|---|
| Reach | 374 | 360 | −14 mm |
| Stack | 575 | 510 | −65 mm |
| Head tube angle | 71.3 | 70.3° | −1.0° |
| Seat tube angle | 73.7 | not listed | |
| Effective top tube | 542 | 507 | −35 mm |
| Chainstay length | 420 | 420 | ±0 mm |
| Wheelbase | 1010 | 983 | −27 mm |
| BB drop | 80 | 80 | ±0 mm |
| BB height | 256 | not listed | |
| Standover | 754 | 657 | −97 mm |
| Seat tube length | 500 | 390 | −110 mm |
| Head tube length | 160 | 95 | −65 mm |
Differences are the Trek Domane AL 4 Gen 4 minus the Trek Domane SL Gen 4. Full charts: 2026 Trek Domane SL Gen 4, 2025 Trek Domane AL 4 Gen 4.
Where each sits in its class
Trek Domane SL Gen 4Trek 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 | Trek Domane SL Gen 4 | Trek Domane AL 4 Gen 4Gen 4 |
|---|---|---|
| Frame | not listed | Trek Domane AL |
| Fork | not listed | Trek Domane AL |
| Shifter | not listed | Shimano Tiagra |
| Derailleur | not listed | Shimano Tiagra |
| Cassette | not listed | Shimano HG500 |
| Chain | not listed | Shimano HG54 Tiagra |
| Crankset | not listed | Shimano Tiagra |
| Chainring | not listed | Shimano Tiagra |
| Bottom bracket | not listed | Shimano RS501 |
| Wheelset | not listed | Bontrager Paradigm 23 |
| Tire | not listed | Bontrager Kwaremont Comp |
| Hub | not listed | Formula RX-512, Formula RX-142 |
| Rim | not listed | Bontrager Paradigm SL |
| Brake | not listed | Shimano Tiagra |
| Rotor | not listed | Shimano SM-RT66 |
| Handlebar | not listed | Bontrager Comp |
| Stem | not listed | Bontrager Elite |
| Bar tape | not listed | Bontrager Supertack Performance |
| Seatpost | not listed | Bontrager Comp |
| Saddle | not listed | Bontrager Verse Short |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
