2024 Trek Domane SL Gen 4 Frameset vs 2025 Trek Domane AL 4 Gen 4
The 49 is the Trek Domane AL 4 Gen 4 size closest to your 50 Trek Domane SL Gen 4 Frameset. 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 Trek Domane SL Gen 4 Frameset in 50, the Trek Domane AL 4 Gen 4 in 49 places the top of the head tube 6 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 5 mm longer, which can contribute to stability at speed.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- +5 mm
- Longer: steadier at speed
- Head angle
- −0.3°
- About the same head angle
- Chainstays
- +5 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Trek Domane SL Gen 4 Frameset numbers we have for size 50 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SL Gen 4 Frameset 50 | Trek Domane AL 4 Gen 4 49 | Difference |
|---|---|---|---|
| Reach | 368 | 368 | ±0 mm |
| Stack | 546 | 540 | −6 mm |
| Head tube angle | 71.1° | 70.8° | −0.3° |
| Effective top tube | 519 | 516 | −3 mm |
| Chainstay length | 420 | 425 | +5 mm |
| Wheelbase | 996 | 1001 | +5 mm |
| BB drop | 80 | 80 | ±0 mm |
| Standover | 716 | 717 | +1 mm |
| Seat tube length | 450 | 440 | −10 mm |
| Head tube length | 130 | 123 | −7 mm |
Differences are the Trek Domane AL 4 Gen 4 minus the Trek Domane SL Gen 4 Frameset. Full charts: 2024 Trek Domane SL Gen 4 Frameset, 2025 Trek Domane AL 4 Gen 4.
Where each sits in its class
Trek Domane SL Gen 4 FramesetTrek 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 FramesetSL Gen 4 Frameset | Trek Domane AL 4 Gen 4Gen 4 |
|---|---|---|
| Fork | Trek Domane SL | Trek Domane AL |
| Frame | 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 |
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