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I can't say I agree, really. I say that a tire/rim combination makes a wheel. The wheel is the completed assembly that the car rides on. I don't call a bicycle spoke a wheel because it is not the entire assembly. When I see racers selling only the metal part they advertise rims, when they are selling only the rubber part they advertise tires (or tyres for the oldschool brit racers) and when they are selling the pair combined they advertise wheels. Consistantly.
As for the outter edge - that's the lip.
I have always considered a transaxle to be under the umbrella of "transmission" like a car is under the umbrella automobile.
Brake/Break and Tread/Thread bug me <- funny this discussion is going on right now on my racing forum.
I also notice a lot of people saying they cruise down the highway at a stead speed of 60mpg.
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