Automotive Inanities

The other day, I was visiting my friend’s repair shop. He was working on a late 1980s Subaru wagon. I  noticed it had 13-inch wheels and four-lug hubs.

You never see this anymore.

That’s too bad.

The smallest wheel/tire you’ll find a new car riding on is a 15-incher. My ’76 Trans-Am, a big (and heavy) muscle car also has 15×7 wheels. But it is a muscle car. Large (for its time) wheels and fat tires made sense because it has a big V8 and lots of power and you need as much traction as possible to keep it all tied down. The fact that bigger wheels and tires add weight and increase rolling resistance and so hurt gas mileage isn’t something people who buy muscle cars tend to worry much about.

Current Prices on popular forms of Silver Bullion

But why put sixteen and seventeen-inch wheels on ordinary family sedans? On economy cars? It makes as much sense as inviting the Pope to the Bunny Ranch.

And yet, new economy cars do come with at least 15-inch wheels and usually sixteens – with seventeens sometimes optional.

This is one of the reasons why the fuel efficiency of modern economy cars is pretty mediocre.

It would be interesting to take, say, a new Corolla or Civic and replace its factory fifteen or sixteen-inch wheels with sane-size – for an economy car – fourteen or thirteen-inch wheels and skinny, low rolling resistance tires and see what effect this has on gas mileage.

It would probably improve it by 5 MPG. Maybe more.   

The car’s high-speed cornering capability would be reduced. But how many American economy car drivers partake of high-speed cornering? How many American drivers do?

I don’t see it much, myself.

And there would be no effect on saaaaaaaaaaaaaaaaaaaaaaaafety. Wheel/tire size doesn’t alter a vehicle’s crashworthiness,…

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