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CHRISTOPHER ROGERS's avatar

Hi Brian, I am an EV advocate (and proud skeptic) and wanted to add a couple of thoughts. It would be interesting to see the corresponding weights of models that are offered in both ICE and BEV models e.g. the Ford F-150, Chevy Silverado, BMW 7 series, I am sure there are others. Also, about the tire wear thing - when I last replaced my tires at a large, reputable chain, I overheard the tech discussing with a Tesla owner how they come in so often with worn-out tires over a relatively short mileage interval, so I suspect there is something to this. My theory - the vehicles that are higher on the list tend to come with big-boy truck tire & wheel setups that may be better suited for their heft. The Teslas ride on regular sedan tires which may be asked to "do more" at the contact patch to keep those 4500 lb cars on the road, and hence scrub off tread at a higher rate?

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Trevor's avatar

You are saying that most/many/some people who buy an SUV or truck do not really 'need' such a vehicle because they do not go off-road or carry large things or something similar, rather use them just as 'cars'. I'm afraid this is a red herring that misses my point completely. Don't get hung up on my use of the word 'need' because what I mean is that they are looking for a vehicle that has certain attributes not that they actually need those attributes i.e. they are in the market for an SUV or a truck even if they are just driving kids to school. Saying that an F350 is equivalent to a Honda Civic because both are used as 'cars' and the category is just 'marketing' is silly. One is clearly much larger than the other and marketing a Civic as a truck isn't going to fool anyone.

We can dispense with all of this because I can make my point another way: it is clear that the type of car we pick will have more to do with whether it is above or below average than whether it is an EV or not. In other words if I pick a truck it will be above average whether it is an EV or not (and whether there is any 'marketing' influence or not). If I pick a sedan it will be below average whether of not it is an EV.

If our goal is to assess if trucks are heavier than average or sedans are lighter than average then this analysis is fine, but if our goal is to assess EVs it is VERY misleading. If we pick the Cybertruck then we would conclude that EVs are twice the average! If we pick the Honda Civic we would conclude that non-EVs are much lighter than average! Both are ridiculous.

You could actually do a proper statistical analysis of this and compare the correlation between 'type' and 'weight' with the correlation between 'EV/non-EV' and 'weight', i.e. is the type of vehicle better predictor of its weight or is whether or not it is an EV better.

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