on each of the two axles 105 although the elevation views in fig1 4 only illustrate a portion of one side of a trailer it should be appreciated that the non illustrated side of the double axle trailer could include an axle lift system on or adjacent to one or both axles preferably a double axle trailer is configured with four axle lift systems one associated with each trailer wheel fig5 is a plan view of an axle lift system installed on a trailer frame according to an embodiment of the invention some components for example the anchor mounting plate 145 and frame 165 are omitted for clarity in the illustrated embodiment the leaf spring 110 is secured above the axle 105 fig5 shows the relative positioning of a wheel hub 505 on the axle 105 as shown the fixed block 135 includes three pulleys the moving block 140 includes two pulleys an end of cable 130 is looped around bolt 510 and terminated with cable clamp 515 in alternative embodiments the fixed block 135 and moving block 140 could each include a fewer or greater number of pulleys fig6 is a functional block diagram of a monitoring and control assembly for an axle lift system according to an embodiment of the invention in the illustrated embodiment a tire pressure monitoring system tpms 605 includes a tpms user interface 610 the tpms 605 may be a direct type relying on the use of pressure sensors inside or outside of each tire or an indirect.