For +35 years all my previous vehicles suggested an 2,1 -2,3 bar as “optimal” pressure and i find hard to believe that suddenly something has radical chanced leading Skoda to suggest 12 -40% higher (the 3,4 bar suggestion for rear/ loaded is unprecedented and in some cases may reaches the max allowed pressure of some tire manufactures…). The only reason i could think of is an agonizing and stupid effort for max fuel economy despite the sacrifice of all other aspects. Specially as living in Greece where the roads outside of highways are very bad maintained, i will never exchange a much softer, better feeling, and safer ride for a slight (if any…) fuel economy of just 0,5-1%... Generally speaking, after all these years i have concluded that 2,1-2,3 bar is the “sweet spot” for every day driving on low and medium loads with a possibly slight increase of 0,2-0,3 in rare cases of full load and/or driving long trips in highways with speeds above 130 km/hour. That i am following to my MK4 regardless what sticker says