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> Even so, 85 to 90 percent of toxic vehicle emissions in traffic come from tire wear and other non-tailpipe sources, which electric and hybrid cars still produ

> Even so, 85 to 90 percent of toxic vehicle emissions in traffic come from tire wear and other non-tailpipe sources, which electric and hybrid cars still produce. First of all, this person meant to say "particulates" [1] and so we are not talking about CO2 at all. Secondly, the source that he links to has this table in it for PM10 (the table for PM2.5 would be analogous) [2]. Almost all of this argument is based on "resuspension". Basically, the car's slip stream. Seriously? By the way, these values are (virtually) calculated all on acount of EVs being heavier. Well done I guess for assuming that braking in EVs won't have PM emissions <nod to regenerative breaking>. It's a pity that an argument based on traffic accidents and cars has to reference such a random and irrelevant article. I agree that Americans like cars too much. [1] https://en.wikipedia.org/wiki/Particulates https://en.wikipedia.org/wiki/Particulates [2] Table 5 Comparison between expected PM 10 emissions of EVs, gasoline and diesel ICEVs (mg/vkm) (Vehicle technology) (Exhaust) (Tyre wear) (Brake wear) (Road wear) (Resuspension) (Total) EV 0 7.2 0 8.9 49.6 65.7 Gasoline ICEV 3.1 6.1 9.3 7.5 40 66.0 Diesel ICEV 2.4 6.1 9.3 7.5 40 65.3

sokoloff 7y ago
I drive an electric; wife drives a gas ICE; I maintain both. No way is electric brake wear 1% or less of a conventional car (what it would take for it to round down to zero in that table). I'd put it at around 5-10% of an ICE, making the total particulate emissions higher.
- dsfyu404ed 7y ago
  Unless you happen to have two of the same car in ICE and electric you're going to need to do some math to account for different brake pad volume and vehicle weight. There's a pretty substantial number of variables that would go into it. I assume you're using the same product line for all your pads.
  - sokoloff 7y ago
    Figuring out whether it's 25% or 50% may require that. Figuring out whether it's sub 1% or >= 2% probably doesn't.
- mikorym 7y ago
  Even if it's 20 percent or more it won't make much of a difference. The table is rediculous to start off with. Almost all of the particulates are due to "resuspension" which is literally the wind / slipstream created by the car. These are not emissions; whatever is on the road is just blown up in the wind and based on this argument they claim that electric cars have more particulate emissions than ICEs.

sokoloff 7y ago

I drive an electric; wife drives a gas ICE; I maintain both. No way is electric brake wear 1% or less of a conventional car (what it would take for it to round down to zero in that table). I'd put it at around 5-10% of an ICE, making the total particulate emissions higher.

dsfyu404ed 7y ago
Unless you happen to have two of the same car in ICE and electric you're going to need to do some math to account for different brake pad volume and vehicle weight. There's a pretty substantial number of variables that would go into it. I assume you're using the same product line for all your pads.
- sokoloff 7y ago
  Figuring out whether it's 25% or 50% may require that. Figuring out whether it's sub 1% or >= 2% probably doesn't.
mikorym 7y ago
Even if it's 20 percent or more it won't make much of a difference. The table is rediculous to start off with. Almost all of the particulates are due to "resuspension" which is literally the wind / slipstream created by the car. These are not emissions; whatever is on the road is just blown up in the wind and based on this argument they claim that electric cars have more particulate emissions than ICEs.