Trailer length and length with respect to width is another factor. Longer trailers typically tow better -- or more accurately, a greater separation between the rear most wheels of the tow vehicle and the fore most wheels of the trailer. A long tongue as discussed in the Strength section can help in facilitating separation. The point here is really the distance with respect to the width. Look at the width of the trailer with respect to the tow vehicle and with respect to the axle separation. The wider the trailer, the more it will benefit from length.