^ ^ McHitch was $169 delivered, ST ... Couldn't have designed it better myself :lol:
. BTW, thanks ...
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You need either slipper or shackle springs with a gross capacity of slightly more than your towing vehicle is rated to tow. 700 Kgs each side should be more than fine. Any heavier than this will cause the trailer to bounce badly rather than ride when loaded. It is normal for a trailer to bounce more than a car when empty.
IMNSHO, shocks are another unnecessary complication. Where you really might need them (off road), you will never be going fast enough to need them! On the open road, they are simply irrelevant. Maybe on a rough-ish dirt road (think dirt with ersatz speed humps), they may have some utility. This need is greatly lessened by not over-springing.
Methinks that you need to re-estimate weights.
Bare trailer is about right at 150 kgs. My 7x4 weighs 143 Kgs with lid, spare, decent jockey wheel and most mods completed. Probably weighs 10-15 Kgs more now.
Tent and sunroom weigh 115 Kgs with poles and pegs.
My creeper winch weighs just under 40 Kgs.
Compressor, spare light weight battery and other recovery gear weighs another 30-40 Kgs.
Each (steel) 20L fuel and water Jerry can weighs about 22 Kgs full. You need at least 40L of fuel and 40L of water for 2 adults and 2 small children. The water is in addition to anything that you may carry with you in the car. Having separate drinking bottles also allows you to monitor whether the kids are getting enough water to maintain hydration.
My basic set of tools weighs about 15 Kgs!
Spare wheel and tyre is about 20 Kgs.
Kitchen in trailer or similar equipment is around another 20-30 Kgs.
Camping gear for the children.
Chairs for everyone, some camp tables.
Miscellaneous annexes, pegs, ropes and tarps.
ONE bog roll! :rotfl:
Etc, etc.
If building/buying from scratch, make sure the trailer sides are 500 mm minimum, and that everything you currently have will fit the size you choose.
I've got to get another coffee .... :iconwink: :lol:.
[EDIT]
Have made a couple of minor changes above after re-infusion of coffee and breakfast.
Try to get a swing-out rear gate, and mount the spare on that. It is a mistake I have made with mine, and will have to rectify at some stage. Having the spare on the drawbar seems logical, and it's where most trailers have it. It makes it far too hard to get the tow ball weight right!
Think about which direction the rear gate swings, and how it will interact with the rest of your kit, such as annexe/s, trailer mounted kitchen, etc.
Also consider the placement of your number plate on the trailer. This is covered by regulation, and MUST be visible from all sorts of angles; cannot be higher than {whatever}, etc. Spare must not intrude into any of these view angles.
Also think about the s/h market.
If you are prepared to wait and then pounce, you can buy a lot of trailer for the money. Often comes with some very expensive extras already fitted - e.g. BIG secondary battery with solar panels or input for same; water tanks and electric pump; camp kitchen; etc, etc. It is very easy, ridiculously so, to drop around $4,000 for a trailer electrics setup!
Avoid the cheap Chinese imports. These all come with 15" rims AFAICT. So do many s/h camper trailers. You need to factor in the cost of a new axle, hubs, brakes, rims and tyres.
Also the pain and suffering of having it all certified as it will no longer comply with the Compliance Plate if made after 1988. The bombers are getting
very hot on these things in the last year or so!
[end edit]