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Cervélo Soloist vs Trek Madone Gen 8: geometry and fit comparison

Matched sizes, stack and reach deltas, and a fit check against your own body instead of guessing from two separate size charts.

2026race geometry
Cervélo Soloist
6 sizes: 48, 51, 54, 56, 58, 61
Full size guide
2025race geometry
Trek Madone Gen 8
6 sizes: XS, S, M, ML, L, XL
Full size guide
In one look

The Cervélo Soloist is built as a race geometry frame, the Trek Madone Gen 8 as a race geometry frame. Across matched sizes the Cervélo Soloist and Trek Madone Gen 8 front ends are within a few millimetres of each other, so posture will depend more on cockpit setup than on the frame. Reach is nearly identical across matched sizes.

Switching from a Cervélo Soloist?

Your closest Trek Madone Gen 8 size, and what will still feel different about the position.

You ride the Cervélo Soloist inTake the Trek Madone Gen 8 inThe position will feel
48XS16 mm taller · 7 mm longerDifferent position
51XS8 mm lower · 4 mm shorter
54M6 mm taller · 1 mm longer
56ML3 mm lower · 3 mm shorter
58L8 mm lower · 7 mm shorter
61XL5 mm lower · 8 mm shorter

Which one fits you better?

Run the same measurements through both frames. The likely size and the full fit report can differ more than the spec sheets suggest.

Quick size check

What Cervélo Soloist size fits you?

Get an instant frame estimate, then continue into the full fit report to check cockpit reach, bar drop, and setup risks before you buy.

No account needed for this check. The full report keeps this bike preselected.

Quick size check

What Trek Madone Gen 8 size fits you?

Get an instant frame estimate, then continue into the full fit report to check cockpit reach, bar drop, and setup risks before you buy.

No account needed for this check. The full report keeps this bike preselected.

FAQ

Which has the taller front end: Cervélo Soloist or Trek Madone Gen 8?

Across matched sizes the Cervélo Soloist and Trek Madone Gen 8 front ends are within a few millimetres of each other, so posture will depend more on cockpit setup than on the frame.

Can the same rider take different sizes on these two bikes?

Yes, and it happens often: frame labels are not standardized. Use the matched-size table for geometry, then run the fit check below with your own measurements for each bike.

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