Argon 18 Sum Pro vs Cervélo R5: 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 Argon 18 Sum Pro is built as a race geometry frame, the Cervélo R5 as a race geometry frame. The Cervélo R5 cockpit runs about 13 mm shorter, a noticeably more compact position. Across matched sizes the Argon 18 Sum Pro and Cervélo R5 front ends are within a few millimetres of each other, so posture will depend more on cockpit setup than on the frame.
Switching from a Argon 18 Sum Pro?
Your closest Cervélo R5 size, and what will still feel different about the position.
| You ride the Argon 18 Sum Pro in | Take the Cervélo R5 in | The position will feel |
|---|---|---|
| XXS | 48 | 25.100000000000023 mm taller · 6.300000000000011 mm shorterDifferent position |
| XS | 48 | 3.1000000000000227 mm taller · 13.300000000000011 mm shorter |
| S | 51 | 4.2000000000000455 mm taller · 12.5 mm shorter |
| M | 54 | 4.600000000000023 mm taller · 13.699999999999989 mm shorter |
| L | 56 | 2.5 mm taller · 13.899999999999977 mm shorter |
| XL | 58 | 1.2999999999999545 mm lower · 13.699999999999989 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 Argon 18 Sum Pro 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 Cervélo R5 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: Argon 18 Sum Pro or Cervélo R5?
Across matched sizes the Argon 18 Sum Pro and Cervélo R5 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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