I am selling my Argon Sum size S (51-53) which I bought in December 2025. Unfortunately it is too small for me. (I am 1.78m with 84.5cm inseam). I recommend this bike size for people between 1.65m and 1.75m.

It is a comfortable bike, relatively aero and light and handles the curves very well (crit proof). The frame and the components usage vary, please see the details below:

Frameset including offset seatpost - Argon 18 Sum (2024) bought in Dec 2025 (invoice available) with around 1000km.
Except from the headtube scratch (only paint) and the minor ones around the right seatstay, the conditio...