Trek vs Specialized
Trek Domane vs Specialized Roubaix Size
Use this comparison when deciding whether a Trek Domane size maps cleanly to a Specialized Roubaix size.
Data reviewed: 2026-05-17
Reference geometry
Size translation by rider height
Height
167-175 cm
Trek: Trek 54
Specialized: Specialized 54
Roubaix reference geometry is slightly taller.
Height
173-181 cm
Trek: Trek 56
Specialized: Specialized 56
Use stack and reach if you are between sizes.
Height
179-187 cm
Trek: Trek 58
Specialized: Specialized 58
Confirm bar height and stem length before sizing up.
Fit decision
Compare measurements, not labels.
Both are endurance road bikes
Domane and Roubaix target a more stable road position than race bikes, but the same printed size can still differ in front-end height and cockpit feel.
Stack is the tie-breaker
A taller stack can feel more upright. If you already ride a comfortable road bike, compare its stack and reach before translating labels directly.
Related comparisons
Open another model comparison or use the interactive comparison hub.
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Interactive bike size comparisons
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FAQ
Short answers before choosing between these models.
Is a Trek Domane 54 the same as a Specialized Roubaix 54?
Not exactly. The size label is a starting point; compare the exact height range, stack, and reach for the model year.
Which is more upright, Domane or Roubaix?
The reference Roubaix geometry in this data set has slightly more stack than the Domane reference, but final posture depends on size and cockpit setup.