It is actually quite common for the front and center hangers to be different sizes on a tandem axle trailer. The idea behind this is that when you factor in the height of the equalizer and shackles, everything will be at a level height. In most cases the front and rear hangers will be the same, with a shorter center hanger. This is certainly not a universal rule, as different trailer manufacturers will do things differently. It sounds like what you are describing is more or less normal... view full answer...