Steerimg axle air suspension

Why is this not common? Ive only ha it on one truck,an S reg Eurostar. Is it an expense thing? Might have asked this before cant remember

Probably is an expense thing. Both our lo riders have it, and apparently it was not cheap.

My stralis low ride has it and i have a demount rigid with front air. If i was buying a new one it would be the first tick in the box. The rigid was great in the sheffield floods a couple of years back, pump it up and drive past the abandoned cars!

Cost new and more things to go wrong.