- LOOK 765 Optimum
- XS
- Stack 534, Reach 358
- Trek Madone Gen 8
- S
- Stack 530, Reach 378
Stack: 4 mm lower
Reach: 20 mm longer
LOOK 765 Optimum 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.
In one look
LOOK 765 Optimum: endurance geometry. Trek Madone Gen 8: race geometry.
- Across matched sizes, the frame fronts of LOOK 765 Optimum and Trek Madone Gen 8 differ by only a few millimetres. Stem and spacer choices will have more effect on handlebar position.
- The frame front of Trek Madone Gen 8 is about 15 mm longer. 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
Trek Madone Gen 8 is the dearer of the two, going by the cheapest build you can buy of each; LOOK 765 Optimum 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.
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 0 mm, forward length 15 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 LOOK 765 Optimum and Trek Madone Gen 8 sizes compare?
See the closest size matches and the differences in stack, reach, and riding position.
- LOOK 765 Optimum
- S
- Stack 558, Reach 368
- Trek Madone Gen 8
- ML
- Stack 562, Reach 389
Stack: 4 mm taller
Reach: 21 mm longer
- LOOK 765 Optimum
- M
- Stack 582, Reach 379
- Trek Madone Gen 8
- L
- Stack 582, Reach 394
Stack: practically identical
Reach: 15 mm longer
- LOOK 765 Optimum
- L
- Stack 606, Reach 389
- Trek Madone Gen 8
- XL
- Stack 610, Reach 402
Stack: 4 mm taller
Reach: 13 mm longer
- LOOK 765 Optimum
- XL
- Stack 630, Reach 399
- Trek Madone Gen 8
- XL
- Stack 610, Reach 402
Stack: 20 mm lower
Reach: 3 mm longer
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: LOOK 765 Optimum or Trek Madone Gen 8?
- Across matched sizes, the frame fronts of LOOK 765 Optimum and Trek Madone Gen 8 differ by only a few millimetres. Stem and spacer choices will have more effect on handlebar position.
TrainCraft training
Prepare for a goal or an event
Read training guides by goal and preparation roadmaps for cycling events, and use free structured workouts with .zwo export. Training plans are part of PRO. Adaptive plan changes that you review and apply are part of PRO AI.