Lifer, The plate that is bolted to the bottom of the fuselage is 5 1/4" wide (so is the fuselage). The distance between the two axle mount plates (with no weight on them) is 19" inside dimension. The height of the gear from the C/L of the axles to the top of the mounting plate is 6 3/8". Hope this helps, what aircraft are you trying to fit this to?