Extra wide Vs: These are the same Vs, but simply bent flatter. These are for intermediate hulls, and most times, they are only needed in the rear. Feel free to reach out about your specific boat. Remember that the shorter a boat is, the closer to the narrower ends it will rest in the rack. So, for instance, you can have a sea kayak that is 24 inches wide, but have race hull widths at the point of contact. With the same logic a shorter bar will contact a wider part of the hull.