LOAD CAPACITY: 1200 LBS /EA TOP PLATE SIZE: 4” X 4-1/2” / BOLT HOLE SPACING: 2-5/8” X 3-5/8” (Slotted to 3” x 3”) OVERALL HEIGHT: 7-1/2” / MOUNTING BOLT SIZE: 3/8” WHEEL DUROMETER: 30,000 PSI TEMPERATURE RANGE: -45F – 600F