Tow your off-road vehicle behind your motorhome with Blue Ox's Off-Road adapter kit. Designed for an aftermarket bumper with 1" diameter lug pins. Works with Blue Ox Tow Bars, including Avail BX7420, Ascent BX4370, Aventa II BX7335, Alpha BX7365, Aventa BX7445, Aladdin BX4325, Allure BX7460P , Acclaim BX4330 and Titan BX7520P. Each lug is 3/4" with a 1" inside span between the lugs.