Need to replace trailer airbag - where do I find the spec?

May be knock off…. I just replaced on last week. $170 Hendrickson

 

Michigan truck spring can be very helpful, go on line for them.

 

To each his own but I myself would not put anything but a good year or other high quality airbag.

There is such an influx of cheap crap from China. The spring and the rubber needs to be a high quality or you're not going to get the life out of it. Instead of eventually getting a small leak the Chinese bag might just blow out.

Not saying it will but any cheap China stuff on eBay is a roll of the dice whether you're getting junk or whether you're getting a little better than junk.

Although there are some guys that they like running Chinese tires and maybe the airbags depending on the brand aren't as bad I don't know.

I just don't put any Chinese junk on my truck. Every single solitary thing I buy for my truck is the best part that I can find.

 

I tried that with a N14 oil pressure sensor. The one from truck dealer was $190.00. Found one on line for thirty something bucks and ordered it. Both looked the same. Same part number and both made in Mexico. One was in a Cummins box and the other had Asian style markings on it. No one could win a shell game with them. Wondered if they came from the same place and that was the mark up.
It worked fine the first day but pegged the gauged out the next morning. It did different funny stuff along.
Gauge always worked fine before but the sender was leaking. Put in the Cummins sender and it it still working years later.
Sent the other one back and got credit but screwed out of freight. No big deal as it is a shuttle truck but what if you did that and hit the road?

 

I wouldn't replace just three. Why not replace them all if they are the same age and three of them are already leaking?