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> but wheels are usually allowed to spin at different speeds to facilitate pavement driving and turning

To drive home why NPS cares about this, the way the car detects how fast the wheel should spin is by detecting slippage. But every time that happens, you're shredding up the road. That turns AWD vehicles into pothole machines.

I drive a Subaru and I drive it off road. I would feel comfortable driving it in most off-road conditions, from a safety perspective, but I won't because I'm fucking up the trail.



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