2026 Specialized Tarmac SL8 LTD Demi Dreaming vs 2025 Trek Émonda ALR
The Trek Émonda ALR size closest to your 54 is the 54. Compare the 54 instead
What changes on the Trek Émonda ALR
Compared with the Specialized Tarmac SL8 LTD Demi Dreaming in 54, the Trek Émonda ALR in 58 places the top of the head tube 37 mm higher and 12 mm further forward, relative to the bottom bracket. Its wheelbase is 14 mm longer, which can contribute to stability at speed.
- Frame stack
- +37 mm
- Higher front end
- Frame reach
- +12 mm
- Longer frame reach
- Wheelbase
- +14 mm
- Longer: steadier at speed
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- +1 mm
- About the same
The two frames
Only the Specialized Tarmac SL8 LTD Demi Dreaming is drawn. The Trek Émonda ALR numbers we have for size 58 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Tarmac SL8 LTD Demi Dreaming 54 | Trek Émonda ALR 58 | Difference |
|---|---|---|---|
| Reach | 384mm | 396 | +12 mm |
| Stack | 544mm | 581 | +37 mm |
| Head tube angle | 73° | 73.8° | +0.8° |
| Seat tube angle | 74° | not listed | |
| Effective top tube | 541mm | 574 | +33 mm |
| Chainstay length | 410mm | 411 | +1 mm |
| Wheelbase | 978mm | 992 | +14 mm |
| BB drop | 72mm | 68 | −4 mm |
| BB height | 268mm | not listed | |
| Standover | 768mm | 793 | +25 mm |
| Seat tube length | 473mm | 553 | +80 mm |
| Fork length | 370mm | not listed | |
| Head tube length | 137mm | 171 | +34 mm |
Differences are the Trek Émonda ALR minus the Specialized Tarmac SL8 LTD Demi Dreaming. Full charts: 2026 Specialized Tarmac SL8 LTD Demi Dreaming, 2025 Trek Émonda ALR.
Where each sits in its class
Specialized Tarmac SL8 LTD Demi DreamingTrek Émonda ALR
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 | Specialized Tarmac SL8 LTD Demi DreamingS-Works LTD Demi Dreaming | Trek Émonda ALRALR 5 |
|---|---|---|
| Frame | Specialized S-Works Tarmac SL8 FACT | not listed |
| Headset | Specialized SL7 | not listed |
| Fork | not listed | Trek Émonda ALR |
| Wheelset | not listed | Bontrager Paradigm SL |
| Tire | not listed | Bontrager R1 Hard-Case Lite |
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