Trek Madone Gen 8 vs Wilier Granturismo SLR: 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 meCompare geometry and sizes

In one look

Trek Madone Gen 8: race geometry. Wilier Granturismo SLR: endurance geometry.

  • Across matched sizes, the frame fronts of Trek Madone Gen 8 and Wilier Granturismo SLR differ by only a few millimetres. Stem and spacer choices will have more effect on handlebar position.
  • The frame front of Wilier Granturismo SLR is about 10 mm shorter. Handlebar position also depends on the stem and spacers.

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

    Wilier Granturismo SLR 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.

2025 • race geometry
Trek Madone Gen 8
Size guide and geometry for the Trek Madone Gen 8
2026 • endurance geometry
Wilier Granturismo SLR
Size guide and geometry for the Wilier Granturismo SLR

Fit and size differences

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

Typical difference across matched sizes: frame front height 2 mm, forward length 10 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 Trek Madone Gen 8 and Wilier Granturismo SLR sizes compare?

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

Trek Madone Gen 8
XS
Stack 507, Reach 370
Wilier Granturismo SLR
XS
Stack 527, Reach 369

Stack: 20 mm taller

Reach: practically identical

Trek Madone Gen 8
S
Stack 530, Reach 378
Wilier Granturismo SLR
XS
Stack 527, Reach 369

Stack: 3 mm lower

Reach: 9 mm shorter

Trek Madone Gen 8
M
Stack 546, Reach 384
Wilier Granturismo SLR
S
Stack 546, Reach 374

Stack: practically identical

Reach: 10 mm shorter

Trek Madone Gen 8
ML
Stack 562, Reach 389
Wilier Granturismo SLR
M
Stack 566, Reach 379

Stack: 4 mm taller

Reach: 10 mm shorter

Trek Madone Gen 8
L
Stack 582, Reach 394
Wilier Granturismo SLR
L
Stack 586, Reach 384

Stack: 4 mm taller

Reach: 10 mm shorter

Trek Madone Gen 8
XL
Stack 610, Reach 402
Wilier Granturismo SLR
XL
Stack 604, Reach 389

Stack: 6 mm lower

Reach: 13 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: Trek Madone Gen 8 or Wilier Granturismo SLR?
Across matched sizes, the frame fronts of Trek Madone Gen 8 and Wilier Granturismo SLR differ by only a few millimetres. Stem and spacer choices will have more effect on handlebar position.

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