They fitted brand new tires and called it a read world test, as if people get new tires every week. Then they measured particulate weight and compared it to ICE

They fitted brand new tires and called it a read world test, as if people get new tires every week. Then they measured particulate weight and compared it to ICE emission regulation as if weight was the deciding factor: 5800 ug of rubber particles vs 4.5 ug of PM soot. The rubber could be 1x 5g chunk or 1000x 1ug or whatever. New cars produce mostly small soot, so 4.5 ug can be about 10 000 000 particles¹. I'm not saying non-exhaust emissions are irrelevant, but I am quite sure exhaust is a much bigger issue, overly so in eastern EU, where people often even remove DP filters and enforcement is lacking. ¹ PM count estimates: coal density: 929 kg/m³ PM10 particle size: 10 um PM10 volume: 4/3 * pi * (5um)^3 ~ 4 * (5e-6 m)^3 ~ 5e-16 m³ PM10 mass: 5e-16m³ * 1e3 kg/m³ = 5e-13 kg = 5e-7 ug = 0.5 pg If exhaust PM was PM10, 4.5 ug would be about 4.5 ug / 5e-7 ug ~ 1e7 = 10M particles, give or take an order of magnitude.