[Kevan]

Kevan,
I know that's true of Scalextric, and other brand's, front axle, but which cars have a rear axle that cannot be popped out, or otherwise removed without pulling off pressed-on wheels? I'm sure they exist, I just don't know of them. Maybe some really old toy cars?

Front axles are what came to mind but if you're going to true a set on a car the rear axle is only half the job.