Military M756 Trailer, Bolster, General Purpose. SN 0148. 4 ea. 12-16.5 LT on 6H Budd Wheels with Mounted Spare. 2-Spring suspension. 224in. Length-- partially-extended, 212" fully-contracted length. 92in. width (to outside of tires). 6ft. rail width, 101in. 'bed' length, 14' to first (adjustable) rail. Air over Hydraulic Brakes, Military-Standard Blackout Lighting.