2027 Trek Domane SL Gen 5 vs 2027 Trek Domane AL 4 Gen 4
The 49 is the Trek Domane AL 4 Gen 4 size closest to your XS Trek Domane SL Gen 5. 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 5 in XS, the Trek Domane AL 4 Gen 4 in 49 places the top of the head tube 16 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 14 mm longer, which can contribute to stability at speed.
- Frame stack
- +16 mm
- Higher front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- +14 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Trek Domane SL Gen 5 numbers we have for size XS are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SL Gen 5 XS | Trek Domane AL 4 Gen 4 49 | Difference |
|---|---|---|---|
| Reach | 368 | 368 | ±0 mm |
| Stack | 524 | 540 | +16 mm |
| Head tube angle | 71.3° | 70.8 | −0.5° |
| Effective top tube | 520 | 516 | −4 mm |
| Chainstay length | 420 | 425 | +5 mm |
| Wheelbase | 987 | 1001 | +14 mm |
| BB drop | 80 | 80 | ±0 mm |
| Standover | 721 | 717 | −4 mm |
| Seat tube length | 444 | 440 | −4 mm |
| Head tube length | 106 | 123 | +17 mm |
| Seat tube angle | not listed | 74.6 |
Differences are the Trek Domane AL 4 Gen 4 minus the Trek Domane SL Gen 5. Full charts: 2027 Trek Domane SL Gen 5, 2027 Trek Domane AL 4 Gen 4.
Where each sits in its class
Trek Domane SL Gen 5Trek 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 5SL 4 Gen 5 | Trek Domane AL 4 Gen 4Gen 4 |
|---|---|---|
| Fork | Trek Domane SL | Trek Domane AL |
| Shifter | Shimano Tiagra R4020 | Shimano Tiagra R4020 |
| Derailleur | Shimano Tiagra R4000 | Shimano Tiagra R4000, Shimano Tiagra 4700 |
| Cassette | Shimano RS400 | Shimano RS400 |
| Chain | Shimano LG500 | Shimano LG500 |
| Crankset | Shimano Tiagra R4000 | Shimano Tiagra R4000 |
| Tire | Bontrager Kwaremont Comp | Bontrager Kwaremont |
| Hub | Formula RX-142, Formula RX-512 | Formula RX-142, Formula RX-512 |
| Rim | Bontrager Paradigm 23 | Bontrager Paradigm 23 |
| Rotor | Tektro TR160 | Shimano SM-RT66 |
| Headset | Bontrager Expander Plug | Bontrager Expander Plug |
| Saddle | Trek Verse | Trek Verse Short |
| Frame | not listed | Trek Domane AL |
| Chainring | not listed | Shimano Tiagra 4700 |
| Bottom bracket | not listed | Shimano RS501 |
| Wheelset | not listed | Bontrager Paradigm 23 |
| Handlebar | not listed | Bontrager Comp |
| Stem | not listed | Bontrager Elite |
| Bar tape | not listed | Bontrager Supertack Perf |
| Seatpost | not listed | Bontrager Comp |
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