I have modified the control of our tag axle. It will dump when below 20 mph "IF" I have the directional lights or 4 way flashers on or when backing up. They do not dump when just stopping. The "Dump tag" switch has been reprogrammed to "inflate" the tag. I can dump the tag when below 20 mph by touching the directional lever and re-inflate them with the "dump tag" switch. Two led lights come on when the tag is dumped. When I pull a 12,000# trailer with a 1500# tongue weight, the steer axle weighs 14,600#(15,600# rating). When the tag is dumped the steer axle drops to 13,800# for less scrubbing of the steer tires and tag tires when turning. After 35,000 miles, I can see no scrubbing wear in the tag tires. To the OP, you have read several opinions of the benefits of a tag. IMHO, the benefits of better handling, more load capacity, two more brakes and better weight distribution far out weight the cost of two tires every eight years and a slight loss of storage capacity.
2013 43 QGP Allegro Bus
26' Enclosed trailer for toys