Just thinking not long before retiring, the lead axle on many tri axle trailers, were often steerable, probably I noticed them more on milk tankers that would have been negotiating tight farm pick up areas. Havent seen that many around nowadays, too hard on tyres scrubbing when loaded?? Still see the tri set up where both front and rear axles lift up, running empty on the centre axle only. Not so much the steerable axles though. First saw a set up whenever the tri became popular, both lift up air bag as well as the fixed lead axle with a rod set up that was controlled from, or by the turntable. Another seemingly good idea at the time that outlived its usefulness??
