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

Yes. Frame labels are not standardized, so the same rider may need different sizes. This comparison deliberately avoids a generic matched-size answer and hands your measurements to Bike Fit instead.

Which frame has the higher front: Pinarello X1 / X3 or Trek Madone Gen 8?

The frame front of Pinarello X1 / X3 is slightly higher, by about 6.2 mm. That difference alone does not settle your position.

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Pinarello X1 / X3 vs Trek Madone Gen 8: which bike is right for you?

Compare ride character, intended rider, geometry, and fit. Add your measurements to see which bike suits you better and which size to choose on each.

Fit verdict: the frame positions differ enough to matter. Compare the geometry below, then use your measurements to identify the safer size and setup.

Compare them for me Compare geometry and sizes

In one look

Pinarello X1 / X3: endurance geometry. Trek Madone Gen 8: race geometry.

The frame front of Pinarello X1 / X3 is slightly higher, by about 6.2 mm. That difference alone does not settle your position.
The frame front of Trek Madone Gen 8 is about 21.5 mm longer. Handlebar position also depends on the stem and spacers.

For the Pinarello X1 / X3 in 600 there is no Trek Madone Gen 8 size with a comparable position: the range simply does not reach there.

The frame standards line up and we hold no sourced weight or performance claim that separates them. What is left to decide is your size and setup on each frame.

Price
Trek Madone Gen 8 is the dearer of the two, going by the cheapest build you can buy of each; Pinarello X1 / X3 starts lower.

Subjective findings from independent tests on stock or near-stock builds. Tyres, pressure and size change how a frame feels.

We compare differences at frame and model level. Components, current price, and availability depend on the exact build and seller.

2026 • endurance geometry: Pinarello X1 / X3; Full size guide
2025 • race geometry: Trek Madone Gen 8; Full size guide

What do you need from this comparison?

Start with the decision you are making. We will ask only for the details needed to answer it.

Step 1/1

What are you trying to understand?

Your answer decides which questions follow and what the result focuses on.

Fit and size differences

Geometry can separate these bikes: matched sizes create a meaningfully different position.

Typical difference across matched sizes: frame front height 6.2 mm, forward length 21.5 mm.

For a personal answer, the fit-and-size path uses your measurements to show only the relevant frame sizes. The full chart remains available as a reference.

View geometry for every size

How do Pinarello X1 / X3 and Trek Madone Gen 8 sizes compare?

See the closest size matches and the differences in stack, reach, and riding position.

Pinarello X1 / X3: 430; Stack 527.5, Reach 341.9
Trek Madone Gen 8: S; Stack 530, Reach 378

Stack: 2.5 mm taller

Reach: 36.1 mm longer

Pinarello X1 / X3: 460; Stack 539.2, Reach 352.1
Trek Madone Gen 8: S; Stack 530, Reach 378

Stack: 9.2 mm lower

Reach: 25.9 mm longer

Pinarello X1 / X3: 490; Stack 552.4, Reach 361.9
Trek Madone Gen 8: M; Stack 546, Reach 384

Stack: 6.4 mm lower

Reach: 22.1 mm longer

Pinarello X1 / X3: 515; Stack 564.4, Reach 368.5
Trek Madone Gen 8: ML; Stack 562, Reach 389

Stack: 2.4 mm lower

Reach: 20.5 mm longer

Pinarello X1 / X3: 530; Stack 575.8, Reach 372.5
Trek Madone Gen 8: L; Stack 582, Reach 394

Stack: 6.2 mm taller

Reach: 21.5 mm longer

Pinarello X1 / X3: 545; Stack 588.2, Reach 376.7
Trek Madone Gen 8: L; Stack 582, Reach 394

Stack: 6.2 mm lower

Reach: 17.3 mm longer

Pinarello X1 / X3: 560; Stack 602.4, Reach 380.2
Trek Madone Gen 8: XL; Stack 610, Reach 402

Stack: 7.6 mm taller

Reach: 21.8 mm longer

Pinarello X1 / X3: 580; Stack 620.3, Reach 384.1
Trek Madone Gen 8: XL; Stack 610, Reach 402

Stack: 10.3 mm lower

Reach: 17.9 mm longer

Pinarello X1 / X3: 600; Stack 640.4, Reach 388.1
Trek Madone Gen 8: XL; Stack 610, Reach 402

Different position

Stack: 30.4 mm lower

Reach: 13.9 mm longer

Pinarello X1 / X3	Trek Madone Gen 8	The position will feel
430Stack 527.5 · Reach 341.9	SStack 530 · Reach 378	Stack: 2.5 mm taller · Reach: 36.1 mm longer
460Stack 539.2 · Reach 352.1	SStack 530 · Reach 378	Stack: 9.2 mm lower · Reach: 25.9 mm longer
490Stack 552.4 · Reach 361.9	MStack 546 · Reach 384	Stack: 6.4 mm lower · Reach: 22.1 mm longer
515Stack 564.4 · Reach 368.5	MLStack 562 · Reach 389	Stack: 2.4 mm lower · Reach: 20.5 mm longer
530Stack 575.8 · Reach 372.5	LStack 582 · Reach 394	Stack: 6.2 mm taller · Reach: 21.5 mm longer
545Stack 588.2 · Reach 376.7	LStack 582 · Reach 394	Stack: 6.2 mm lower · Reach: 17.3 mm longer
560Stack 602.4 · Reach 380.2	XLStack 610 · Reach 402	Stack: 7.6 mm taller · Reach: 21.8 mm longer
580Stack 620.3 · Reach 384.1	XLStack 610 · Reach 402	Stack: 10.3 mm lower · Reach: 17.9 mm longer
600Stack 640.4 · Reach 388.1	XLStack 610 · Reach 402	Different position

The same size label can create a different position on each frame. Stack and reach are one part of the decision; the personalized comparison connects them to your body and each bike’s ride character.

FAQ

Can the same rider take different sizes on these two bikes?: Yes. Frame labels are not standardized, so the same rider may need different sizes. This comparison deliberately avoids a generic matched-size answer and hands your measurements to Bike Fit instead.
Which frame has the higher front: Pinarello X1 / X3 or Trek Madone Gen 8?: The frame front of Pinarello X1 / X3 is slightly higher, by about 6.2 mm. That difference alone does not settle your position.

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