Hi all,

I have a bit of a dilemma for my 1990 RB30 GQ with 315,000km on the clock. One of the rear Polyair bags has sprung a leak (the material has perished at the base). Suspension set-up is currently old but in decent working condition (previously used to tow a small camper trailer):

2" lift springs all round (RED - pedders? some flaky surface rust). AGE: 7 years? Don't seem TOO saggy...
FRONT: aftermarket shockers (unknown brand, yellow) AGE: 7 years?
REAR: Polyair bags with black shockers (Nissan brand markings - surely not OE?). AGE: 25 years?!

Anyway, with a limited budget... what is my best bet? I don't tow anything; just camp as a family of 5 (plus all that gear and water), and car has a 145lt Long range tank. So need something to take a full GVM load, but not towing...

1. Just replace the air bags ($240 for 2 - might as well do both)
OR
2. Ditch the airbags altogether and buy new heavy-duty springs ($250?)

Also, I find it hard to believe that the rear are the original 25 year old shocks, as the car handles well and stops bouncing quickly after the "jump on a corner" test (with airbags empty). Is it worth replacing these just to be sure or is there another way to tell if they're shagged... ?

Many thanks in advance,
Chris