Spacers vs polyair vs stiffer springs

Submitted: Tuesday, Jan 08, 2008 at 09:47
ThreadID: 53236 Views:2024 Replies:3 FollowUps:4
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G’day all!

Like to have any input about subject. Recently have installed dual wheel carrier and when fully laden with both wheel rear sag significantly. Spacers obviously cheaper and polyair and springs about the same price with own proc and conc. So what to do?
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Reply By: Member - Oldplodder (QLD) - Tuesday, Jan 08, 2008 at 09:55

Tuesday, Jan 08, 2008 at 09:55
Havn't tried spacers.
If you are running the same load most of the time, the spacers would solve the problem.
I can be running empty around town, then load up for a trip, with a half or full load, so went looking for something that would give a better solution for three situations :o)
Have tried poly's and stiffer springs.
Have variable rate springs in the rear that are standard spring rate at normal ride height, but stiffen up quickly with a load.
Have also installed air bags, and they just give that little bit of finer adjustment. You don't need to go as heavy with the springs with air bags for the same load.
Of course, stiffer suspension equals less suspension travel in the rough stuff, so that leads back to spacers.
AnswerID: 280428

Reply By: Sand Man (SA) - Tuesday, Jan 08, 2008 at 11:07

Tuesday, Jan 08, 2008 at 11:07
Polyair airbags in your existing springs will solve your problem.

You only need new springs if the existing ones have deteriorated, or you wish to upgrade your suspension.

Having Polyairs fitted to the Jack tomorrow.


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AnswerID: 280439

Follow Up By: Joe - Tuesday, Jan 08, 2008 at 11:16

Tuesday, Jan 08, 2008 at 11:16
With varying loads Polyairs are flexable,durable also,had them on for a number of years and also did the simpsom desert madigan line and hay river twice without any issues.
FollowupID: 544667

Follow Up By: Member - Ken W (NSW) - Tuesday, Jan 08, 2008 at 15:15

Tuesday, Jan 08, 2008 at 15:15
Have used polyairs for about 5 years now on many 4wd trips 2 aduts, 2 kids and all the associated junk in the back and on roofrack and can't can't complain. A couple of times I've had to let air out of back for wheel travel in some unexpected "extreme" circumstances for short time then hi lift jacked up truck and refilled bags ( to take load off bags for air fill). great to lower pressure around town when unfilled.
FollowupID: 544692

Reply By: KSV. - Wednesday, Jan 09, 2008 at 08:32

Wednesday, Jan 09, 2008 at 08:32
Thanks everyone for replay. At this stage I am thinking to put polyairs and if appears to be inadequate upgrade spring later.

AnswerID: 280555

Follow Up By: Member - JohnR (Vic)&Kath - Wednesday, Jan 09, 2008 at 16:29

Wednesday, Jan 09, 2008 at 16:29
Serg, you don't actually say what the vehicle is. If you are carrying much weight on some vehicles, it can impact on other areas. My Nissan for instance started to push up the spring hangers. That may have been just the OE shocks, so just be aware you may just put sresses else where.
FollowupID: 544877

Follow Up By: KSV. - Wednesday, Jan 09, 2008 at 16:55

Wednesday, Jan 09, 2008 at 16:55
Sorry – you right :-)
LC80, OME shocks and springs. Very much leveled when empty and light loaded and only with two spare wheels hanging out plus full camping rubbish inside plus 5 people (4.5 considering weight of younger one :-) ) plus full 170L spare tank its rear noticeably sag and can be easy bottomed on not so big bump.

FollowupID: 544889

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