Pinarello's seatstay compliance is aggressive enough that engineers had to bolt extra struts between the seat tube and seatstays just to keep lateral stiffness intact — a fix that shouldn't be necessary at this price point. Reviewers confirm the payoff is real: ride quality improves dramatically going from narrower tires to 35mm, with buzziness dissipating almost entirely. This is a bike tuned around tire choice, not one that's simply comfortable out of the box.