I replied to a thread yesterday in regards to a short wheel based tow vehicle, mine actually. Another member replied and gave the rule of thumb calculation for wheel base verses towed length. The formula is quite simple:
Allow up to a 20' trailer for the first 110 inches of wheelbase, then 1 foot of trailer for every 4" of wheelbase.
So:
110" 20'
114" 21'
118" 22'
122" 23' and so on
Hope this helps.
Dave
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