Factor OSTRO VAM 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 are close, a few millimetres apart. The frame alone will not decide this; use your measurements to see which size and setup gets nearer to your position on each bike.

Compare them for meCompare geometry and sizes

In one look

Factor OSTRO VAM: race geometry. Trek Madone Gen 8: race geometry.

  • The frame front of Trek Madone Gen 8 is slightly higher, by about 4 mm. That difference alone does not settle your position.
  • The forward length of the frame is nearly the same across matched sizes.

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

    Factor OSTRO VAM is the dearer of the two, going by the cheapest build you can buy of each; Trek Madone Gen 8 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 • race geometry
Factor OSTRO VAM
Full size guide
2025 • race geometry
Trek Madone Gen 8
Full size guide

Fit and size differences

The matched frame measurements differ by only a few millimetres, so stem and spacer choices can matter more than the frame.

Typical difference across matched sizes: frame front height 4 mm, forward length 0 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 Factor OSTRO VAM and Trek Madone Gen 8 sizes compare?

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

Factor OSTRO VAM
45
Stack 502, Reach 360
Trek Madone Gen 8
XS
Stack 507, Reach 370

Stack: 5 mm taller

Reach: 10 mm longer

Factor OSTRO VAM
49
Stack 503, Reach 370
Trek Madone Gen 8
XS
Stack 507, Reach 370

Stack: 4 mm taller

Reach: practically identical

Factor OSTRO VAM
52
Stack 523, Reach 376
Trek Madone Gen 8
S
Stack 530, Reach 378

Stack: 7 mm taller

Reach: practically identical

Factor OSTRO VAM
54
Stack 542, Reach 384
Trek Madone Gen 8
M
Stack 546, Reach 384

Stack: 4 mm taller

Reach: practically identical

Factor OSTRO VAM
56
Stack 565, Reach 392
Trek Madone Gen 8
ML
Stack 562, Reach 389

Stack: 3 mm lower

Reach: 3 mm shorter

Factor OSTRO VAM
58
Stack 587, Reach 401
Trek Madone Gen 8
L
Stack 582, Reach 394

Stack: 5 mm lower

Reach: 7 mm shorter

Factor OSTRO VAM
61
Stack 611, Reach 409
Trek Madone Gen 8
XL
Stack 610, Reach 402

Stack: practically identical

Reach: 7 mm shorter

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: Factor OSTRO VAM or Trek Madone Gen 8?
The frame front of Trek Madone Gen 8 is slightly higher, by about 4 mm. That difference alone does not settle your position.

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