HOW TO MEASURE YOUR U-BOLTS
A.) First, measure the diameter of your u-bolt bar. For example, 22mm.

B.) Second, measure the width between the legs of the u-bolt. (This is NOT from centre of bar to centre of bar.)

C.) Third, measure the length of the u-bolt from the inside of the top down to bottom of leg. See diagram below to note differences in types of u-bolts and where measurements should be made.

D.) Write down your measurement as diameter x width x length. For example: 22 x 90 x 285

Because there are many variables for and options for vehicles and trailers, making accurate measurements ensures that you will get the right ones. Even if listings indicate that a particular u-bolt will fit your vehicle, it is still wiser to double-check by making your own correct measurement.