Factor OSTRO VAM vs Specialized Tarmac SL9: 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.
The Factor OSTRO VAM is built as a race geometry frame, the Specialized Tarmac SL9 as a race geometry frame. Across matched sizes the Factor OSTRO VAM and Specialized Tarmac SL9 front ends are within a few millimetres of each other, so posture will depend more on cockpit setup than on the frame. Reach is nearly identical across matched sizes.
Switching from a Factor OSTRO VAM?
Your closest Specialized Tarmac SL9 size, and what will still feel different about the position.
| You ride the Factor OSTRO VAM in | Take the Specialized Tarmac SL9 in | The position will feel |
|---|---|---|
| 45 | 44 | 1 mm lower · 6 mm longer |
| 49 | 44 | 2 mm lower · 4 mm shorter |
| 52 | 52 | 4 mm taller · 4 mm longer |
| 54 | 54 | 2 mm taller |
| 56 | 56 | 3 mm longer |
| 58 | 58 | 4 mm taller · 1 mm longer |
| 61 | 61 | 1 mm taller · 1 mm shorter |
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.
What Factor OSTRO VAM 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.
What Specialized Tarmac SL9 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: Factor OSTRO VAM or Specialized Tarmac SL9?
Across matched sizes the Factor OSTRO VAM and Specialized Tarmac SL9 front ends are within a few millimetres of each other, so posture will depend more on cockpit setup than on the frame.
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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