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Ridley Noah Fast 3.0 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.

2025race geometry
Ridley Noah Fast 3.0
5 sizes: XXS, XS, S, M, L
Full size guide
2025race geometry
Trek Madone Gen 8
6 sizes: XS, S, M, ML, L, XL
Full size guide
In one look

The Ridley Noah Fast 3.0 is built as a race geometry frame, the Trek Madone Gen 8 as a race geometry frame. The Trek Madone Gen 8 cockpit runs about 22 mm shorter, a noticeably more compact position. The Trek Madone Gen 8 stack is slightly taller, about 7 mm, which is not enough to change the position by itself.

For the Ridley Noah Fast 3.0 in S, M, L there is no Trek Madone Gen 8 size with a comparable position: the range simply does not reach there.

Switching from a Ridley Noah Fast 3.0?

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

You ride the Ridley Noah Fast 3.0 inTake the Trek Madone Gen 8 inThe position will feel
XXSXS10 mm taller · 16 mm shorterDifferent position
XSXS3 mm taller · 29 mm shorterDifferent position

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 Ridley Noah Fast 3.0 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: Ridley Noah Fast 3.0 or Trek Madone Gen 8?

The Trek Madone Gen 8 stack is slightly taller, about 7 mm, which is not enough to change the position by itself.

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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