Why does a combination vehicle with a longer wheelbase off-track more than one with a shorter wheelbase?

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1. Wheelbase length has no relationship to off-tracking
2. A longer wheelbase creates a bigger difference between the front wheels' path and the rear wheels' path in a turn
3. Longer combinations always off-track less than shorter ones because their extra length lets them turn more slowly
4. Off-tracking only depends on tire size, not wheelbase

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