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Ballast when towing?

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20 Feb 2024 12:55 - 20 Feb 2024 13:02 #254477 by yakuza
Replied by yakuza on topic Ballast when towing?
Not sure how interresting this is but same here in Norway.
My 1984 SJ 410 has an max unbraked trailer weigjt of 430kg
My 1987 lwb SJ413 500kg
And the 2005 jimny 350kg.

Wich was OK as we had a speed limit of 60kmt for any unbraked trailer over 350kg. But now that limit has been lifted.

Edit: I have been pulling my unbraked boat though, it is 700kg or so. I have not been on any highway with that and only 60-70kmt and slower in the turns and bends and taking it easy. no problem braking going slowly down very steep hills.I cannot recommend it of course.

Norway 2005 Jimny M16A VVT, 235 BFG MT, 2" Trailmaster, ARB rear lck, 17%/87% high/low gears.
Last edit: 20 Feb 2024 13:02 by yakuza.

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20 Feb 2024 13:40 #254480 by DrRobin
Replied by DrRobin on topic Ballast when towing?
Thanks Yakuza,

My boat is less than your weight about 450kg, plus or minus a few kg. It should be one journey though. There are two dual carriageway A roads, but I could go along the back roads (pretty much through small villages and farm yards) to avoid the main A roads, although it won't make any difference and there will be more bends and stopping points on the side roads.

I am going to wait for a non-windy day though, my boat is a racing keel boat, so physically quite long but not heavy. Think of it as a very streamlined low caravan and like the Jimny it catches side winds a bit.

Robin

2020 blue SZ5 (one of the last to be registered in the UK)
Ex 2011 Blue Jimny SZ4
Northumberland Jimny Blog

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20 Feb 2024 13:52 #254481 by Busta
Replied by Busta on topic Ballast when towing?
My old firewood trailer was un-braked and would weigh 450-550kg depending on the logs. I did tens of thousands of miles with that and it was perfectly stable. I only had one incident where I skidded into the back of a car waiting to make a right turn. That was caused by a combination of factors including the un-braked trailer, mud terrain tyres, wet roads and me being distracted by the pretty girl in the layby.

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20 Feb 2024 21:20 #254493 by yakuza
Replied by yakuza on topic Ballast when towing?
As long as the weight on the ball is ok and the balance is ok it should not be any problem.
Much more important to have 70 to 100 kg on the hitch in my opinion than the total weight.
If too light on the hitch the wind could get nasty on a large load.

Norway 2005 Jimny M16A VVT, 235 BFG MT, 2" Trailmaster, ARB rear lck, 17%/87% high/low gears.

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21 Feb 2024 05:45 #254495 by Lambert
Replied by Lambert on topic Ballast when towing?

My old firewood trailer was un-braked and would weigh 450-550kg depending on the logs. I did tens of thousands of miles with that and it was perfectly stable. I only had one incident where I skidded into the back of a car waiting to make a right turn. That was caused by a combination of factors including the un-braked trailer, mud terrain tyres, wet roads and me being distracted by the pretty girl in the layby.


Unfortunately "there was a pretty girl..." is not a valid defense in the eyes of the law. More's the pity.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
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26 Feb 2024 05:51 #254591 by Hughes
Replied by Hughes on topic Ballast when towing?
Down here in NZ, overrun brakes historically have been the norm, trailer brakes are required on 1 x axle between 2500 - 3000kg, and both axles between 2500 and 3500kg. Over 2500 kg also needs a breakaway system. Generally means electric drums over 2500kg. Also your vehicle needs to stop within 7m from 30kmh.

Interestingly my dealer fitted towbar says 450 kg braked or not with 50kg tongue weight. The towbar itself is much the same design as ones fitted to much bigger vehicles, so I'd say it reflects the vehicles perceived capabilities not the towbars. I've towed more than that (unbraked) with no issue, apart from the massive increase in stopping distance and abysmal performance on hills.

I'd agree with the idea that you'd ballast the front, not the rear as the front is what does pretty much all the braking, but has less traction the more tounge weight you have, this gets heavier of course under braking as the weight balance "shifts" forward on the trailer.

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