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Trailer Suspension #282874
06/12/16 07:27 PM
06/12/16 07:27 PM
Joined: May 2004
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Ventucky Red Offline OP
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Anyone have the proper name for this system.... I am rehabbing the trailer while my boat "summers" in Santa Barbara and need to get some parts...

[Linked Image]

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Re: Trailer Suspension [Re: Ventucky Red] #282877
06/13/16 07:49 AM
06/13/16 07:49 AM
Joined: Aug 2011
Posts: 774
Greenville SC
bacho Offline
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Looks home made to me, not sure how that leaf spring is supposed to allow the beam to flex with no shackle or slider on it.

Re: Trailer Suspension [Re: bacho] #282878
06/13/16 10:09 AM
06/13/16 10:09 AM
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Originally Posted by bacho
Looks home made to me, not sure how that leaf spring is supposed to allow the beam to flex with no shackle or slider on it.


Nope not home made, made by Peek trailers.. I have seen a few of these over the years.... just a little overkill for a Prindle 18

Re: Trailer Suspension [Re: Ventucky Red] #282880
06/13/16 11:43 AM
06/13/16 11:43 AM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Weird.

If the trailer beams are a standard spacing I'd just swap a torsion axle on. "If" is a big word though sometimes.


I'm boatless.
Re: Trailer Suspension [Re: Ventucky Red] #282882
06/13/16 01:13 PM
06/13/16 01:13 PM
Joined: Aug 2011
Posts: 774
Greenville SC
bacho Offline
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Its likely off the shelf parts on all of those bushings, along with that leaf spring. Some measurements should be all you need at any decent trailer parts shop.

Re: Trailer Suspension [Re: bacho] #282884
06/13/16 04:26 PM
06/13/16 04:26 PM
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Originally Posted by Karl_Brogger
Weird.

If the trailer beams are a standard spacing I'd just swap a torsion axle on. "If" is a big word though sometimes.


If is the key word... which it is not...

Originally Posted by bacho
Its likely off the shelf parts on all of those bushings, along with that leaf spring. Some measurements should be all you need at any decent trailer parts shop.


And they do.. tore into it last night and just got back from the trailer store... with the exception of the shocks everything is available.. surprisingly the bearings, races, and seals were in excellent shape considering their age, but they're getting a work over too.. The springs etc.. all in good shape, or should I say I have far worse cursing down the freeway..




Last edited by Ventucky Red; 06/13/16 04:26 PM.
Re: Trailer Suspension [Re: Ventucky Red] #282886
06/13/16 06:24 PM
06/13/16 06:24 PM
Joined: Aug 2011
Posts: 774
Greenville SC
bacho Offline
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Those shocks were common on old school lifted 4x4s. I imagine Ebay could produce some, or I believe there are kits to convert Rancho 5000 series shocks over.

Re: Trailer Suspension [Re: bacho] #282889
06/14/16 12:47 PM
06/14/16 12:47 PM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
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Originally Posted by bacho
Those shocks were common on old school lifted 4x4s. I imagine Ebay could produce some, or I believe there are kits to convert Rancho 5000 series shocks over.


I bet those Rancheros would be really stiff shocks for what he has there (not to mention pricey). I put a set on a Nissan 4x4 I had once and the ride turned into the equivalent of a log wagon.

I'm not sure what the coilover shocks add to that suspension anyway, though...Having both the leaf spring and coil over shocks is nothing but redundancy...leaf springs provide a bit of frequency absorption through friction between leafs and don't typically use shocks (on trailers anyway). However, in that application, I presume those leaf springs only serve the purpose of a fourth link in that suspension system and keep the axle in place while the coil over shocks do most of the suspension work.

With that in mind, I would consider something like the Gabriel load carrier shocks. They have some with a variable rate spring that only starts to add relative load carrying capacity under some compression...that should be pretty good for that application. You would need to call someone and give them travel dimensions for that shock to figure out which version would fit.

https://www.summitracing.com/search...ing&keyword=gabriel%20load%20carrier


Jake Kohl
Re: Trailer Suspension [Re: Ventucky Red] #282901
06/15/16 01:06 PM
06/15/16 01:06 PM
Joined: Dec 2001
Posts: 5,590
Naples, FL
waterbug_wpb Offline
Carpal Tunnel
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Naples, FL
what type of boat will you be carrying? This setup seems more suited for pontoon/deck boat types that are very heavy...?


Jay

Re: Trailer Suspension [Re: Ventucky Red] #282905
06/15/16 06:42 PM
06/15/16 06:42 PM
Joined: Feb 2007
Posts: 402
Punta Gorda, FL
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jkkartz1 Offline
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Punta Gorda, FL
It kinda looks like a De Dion rear car suspension.

Other than boat trailer racing, do you really need an independent suspension?

Re: Trailer Suspension [Re: jkkartz1] #282908
06/15/16 08:30 PM
06/15/16 08:30 PM
Joined: May 2004
Posts: 1,403
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Ventucky Red Offline OP
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Originally Posted by waterbug_wpb
what type of boat will you be carrying? This setup seems more suited for pontoon/deck boat types that are very heavy...?


Prindle 18.... it is the trailer that came with my $100 boat... I cut of the risers that held the boat... fronts we 14" and the rears were 18" as pictured... In talking to the trailer store guy the other day he was pretty versed on these things. Told me they manufacture made a one size fits all trailer

[Linked Image]

Originally Posted by jkkartz1
It kinda looks like a De Dion rear car suspension.

Other than boat trailer racing, do you really need an independent suspension?


I got this boat a good 200 miles from my house... there was a few times it felt like it was not even back there when towing it home,, it was pretty smooth... Boat Trailer Racing hmmmmmmmmmmm you got me thinking here!

Originally Posted by Jake


I bet those Rancheros would be really stiff shocks for what he has there (not to mention pricey). I put a set on a Nissan 4x4 I had once and the ride turned into the equivalent of a log wagon.

I'm not sure what the coilover shocks add to that suspension anyway, though...Having both the leaf spring and coil over shocks is nothing but redundancy...leaf springs provide a bit of frequency absorption through friction between leafs and don't typically use shocks (on trailers anyway). However, in that application, I presume those leaf springs only serve the purpose of a fourth link in that suspension system and keep the axle in place while the coil over shocks do most of the suspension work.

With that in mind, I would consider something like the Gabriel load carrier shocks. They have some with a variable rate spring that only starts to add relative load carrying capacity under some compression...that should be pretty good for that application. You would need to call someone and give them travel dimensions for that shock to figure out which version would fit.

https://www.summitracing.com/search...ing&keyword=gabriel%20load%20carrier


I don't think these are the original shocks... there is another trailer with the same set up at our storage yard... a Hobie 20 that hasn't moved in 13 years... that has some Sears $9.99 specials...

Summit Racing... they can burn a hole in your pocket pretty quick..

Last edited by Ventucky Red; 06/15/16 08:44 PM.
Re: Trailer Suspension [Re: Ventucky Red] #282910
06/16/16 06:28 AM
06/16/16 06:28 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
Originally Posted by Ventucky Red


I don't think these are the original shocks... there is another trailer with the same set up at our storage yard... a Hobie 20 that hasn't moved in 13 years... that has some Sears $9.99 specials...

Summit Racing... they can burn a hole in your pocket pretty quick..


No, certainly not the original..I wouldn't expect that the original shocks would still be available but you never know, I suppose.

$80 isn't bad for a pair of coil over shocks that include the springs.


Jake Kohl

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