The best replacement for air ride is hydraulics.

The best alternatives to air ride are rated as following:
★★★★★  hydraulics
★★★★  coilovers
★★★  spring ride
★★★  air bags
★★  spring suspension
★★  leaf springs
★  coilover
  hydros

Your alternative for air ride is not listed? Suggest!
Speaking about air ride, one probably shouldn't forget about leaf springs.

Other search terms related to air ride and their ratings are:
★★★★★ leaf springs
You have in mind a companion for air ride and it is not yet here? Propose!



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air ride
hydraulics
coilovers