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What to do if you caravan has Nitrogen inflated tyres?!

That advice to set your psi at 50 being half your speed is just silly, wrong and dangerous. Perhaps when he says it’s the “general rule of thumb out there in caravan land” he’s referring to Australian built dual axle vans? I don’t know I don’t have one. I do know if I followed that advice for my dual axle Euro van, I’d be running at 20% over inflated. Similarly if my friend with a single axle van followed it, he’d be running his at 25% under inflated. I do a proper calc using the load rating and I don’t use the ATM as per this video; I use the actual weight on the axles because that’s what the tyres are supporting. I suggest this video be removed.

Do the German ones heat up faster and keep you warmer? They are all claimed at 2kw but i read somewhere the German ones get hot faster and output more heat?

So, in a 40 zone I go 20psi ? What a confusing pile of sh!t

Have a tandem caravan near enough to 3T weight. Independent coil non-load sharing suspension. 245/75r16 LT tyres (85psi max pressure), load rating of 121. I tend to use a "4psi increase over cold when at operating temp" benchmark for most vehicles. Based on this I run 62psi in the tyres and still get a 6psi increase when driving on tarmac on a fine 25C day. Tyre temps sitting at about 30-32C which I am comfortable with and the primary reason I don't bump up the pressure. Have 265/70r17 LT 123LR tyres on the tow vehicle. Rears get an additional 10psi (to 46psi) when towing and sit at about 50-51psi when at operating temp. I think 50psi would kill my caravan tyres real fast. Calculations give a starting point but all tyres/vehicles/conditions and driving styles will be different, better to keep an eye on tyre temp and pressure changes than apply a rule in blind faith. Spend $50 on a decent gauge and then spend 5 minutes checking pressures after a decent drive. Then you will KNOW if your tyres are too high or too low.

Good idea to put your hand on the bearing and check for heat.

great video well done guys

What's with the obsession with staying in caravan parks? You've got this behemoth of a van with all the gear, and you're reluctant to free camp.

The calculation doesn’t appear right for my single axle van. The recommended psi is 75. No way I would be putting 75psi in my tyres. I run them at 50psi on the black top and 30psi on outback roads.

Pretty sure the majority of the temperature increase is from sidewall flex not "road heat".

Great exaplainer thanks! ive always gone by the ~4psi rule on everything i use (cars bikes 4wd etc), good to see after all the math is done, its still a decent benchmark. 🍻

I always thought the majority of heat was generated by side wall flex if under inflated. Any road heat would be negated by air cooling for the other320 degrees of rotation. 🤷‍♂️

At no point in the video did you talk about load rating of a tyre. The load rating and weight of your setup plays a huge part in what pressures to run 🤷🏽‍♂️

What do I do when there is no water coming out the A frame hose tap? I am connected to mains and nothing is flowing through the van or out of the drawbar tap

2700*2.2/2/35 = 84 PSI? Higher than the Max PSI of the tyre!

Rather than using the ATM, I would have thought it made more sense to use the GTM given this is the part of the van weight that sits on the road and discounts the towball download weight borne by the tow vehicle. That said, appreciate the advice being given. I have checked tyre pressure recommendation with my dealer several times and am more than convinced I’ve been getting the wrong advice for years now.

Thanks for your info, really helpful, love the maths equations 😵‍💫

Thanks for taking the time to put this together and to explain. But using your calculations, on my single axle 18 foot full off road van with an ATM of 3200 would be around 100 PSI. This seems extremely high. Considering the max the tyres can go is 80psi the tyres I am running are Mickey Thompson BAJA LEGEND EXP 295/70R18 129-Q (1850kg) I am currently running 65 psi on the bitumen (up to 100 km) and off road with corrugations 50 psi and generally keep speed down to (60 km or less depending on road condition) I would welcome your feedback on this. Thanks. Cheers

No reviews or comments because camping is illegal there. Peanuts like you who want to be insta-famous end up ruining these gems for everyone.

my van all terrain tyres say 65psi---ridiculous, i run em at 50

Thanks for taking the time to put this together. Using your calculations, a single axle van with an ATM of 2900 would be around 91 PSI. This seems extremely high.

Load rating is important also, as with each individual tyre there is different load rating or how much weigh they can carry. For example, on our single axle, 18 ft Wild Child, our big off road family van, they have to have about 60 - 70psi in the tyres, as anything less than that on a highway, the tyre isn’t actually rated to carry the weight that you have put on it. From the marvel web site

I had a marvel rv that said 90psi on the tag, pretty sure they had a video to explain why

Nah cold tyre pressure says 475 kpa same as max pressure on my tag= converts to 70psi.

Just put 39psi in my car. I love tyres.😅

In the formula, instead of Caravan ATM it should be actual weight i.e. Tyre Inflation Pressure = (van weight - towball weight) / (tyre load rating * number of tyres)) * maximum tyre pressure

Great Video - Using your calculation method, I applied it to my single axle Futura car trailer. The calculation matched the Owner's Manual. 53 PSI!. Now I know how the recommended tyre value was derived. Thanks.

shouldnt you go by what is stamped on your compliance plate ?.

I have a Coromal Seka 535 (18ft poptop) x dual axle (independent suspension) with a tare weight 1,300kg (and ATM 1,700) LT tyres and i usually run 50psi in them for highway driving Doing youir maths 1.300 x 2.2 = 2,860 divide by 4 = 715 divide by 35 = 20psi ?? There is no way i am going to run the tyres with 20psi. Please explain that one Data card states 36psi but i run 40 to 45 cold - dependant on how heavy i load it up with payload

Thats a percentage sign % , not a division sign ÷ , doh! Not a good start for a maths lesson.

Great video. Thanks Dave

Absolutely second the Makita compressor, I think because it runs on 18v it's way better than the 12 volt ones. Not as fast as a shop one and probably not for hardcore off roaders but gets the job done inc pushbikes. So easy to use. Awesome video too, thanks.

My AVan single axel has a loaded weight of 1935kg, and by your tyre pressure calculation, tyres should be around 60psi. My compliance plate says 34psi. Next time we're on the road I'll do the pressure check after an hour to check see where we are with the "4 psi rule", but I'm confused by AVan's pressure recomendation.

i just worked out my tyre presure by this maths and my coromal element said 37.5PSI no way 45Psi all day

I've just used your calculation on my Jayco Journey single axel. It works out exactly right 60 PSI. Perfect, great video on this very important subject.

Hi Dave, thanks for the useful (and timely) video. However, as per other comments below, the numbers are not quite crunching correctly for my application. I have a 2018 Goldstream Wing 3ST (single independent axle full Offroad spec) with 15x7 rims, and newly fitted Falken Wildpeak AT3W tyres in 31-10.5.15 sizing or 265/75/15. The camper trailer tare is 1525kg, and ATM is 2000kg. Tyre placard in the camper states min cold px of 250 kpa (36PSI) and max cold px of 350kpa (50PSI). When I crunch the numbers as per your video, I ended up with a recommended 47.93PSI for 1525kg, and 62.85PSI for 2000kg.. What would you advise for my application?

So, if I got this right. Pull your equipment out, check your nuts and halve your speed?

Is this calculation the same for 2 wheel single axle vans? When doing this calc mine came up with 83PSI but compliance plate indicates 45-47 PSI. 2642 ATM. I had them a bit lower and got some sway but increased to 45 and was better. Thinking maybe increasing but not sure 83 sounds right. Is there a formula for 2 wheels?

Good advice. Only thing I would add is the 4 to 5psi variation from cold to hot can vary a lot depending on the conditions. My car and van both have tyre pressure monitor systems and on cold, wet roads the tyre temp will only vary 2 or 3 degrees. On really hot days the pressure can vary 6 to 7 degrees. If driving on a dry road and suddenly the road becomes wet the tyre pressures will drop a few degrees. Something to be aware of.

When I use this calaculation with my current van I get a recommended PSI of 92.7?? I have a single axle van with LT tyres, ATM of 2950 kg. Clearly doesnt make sense here. How does this calculation take into account TBM at say 300kg reduces weight on axle and load factor of the tyre, in my case 1450kg? I would welcome your feedback on this. Thanks.

The ‘passenger car’ tyre calculation does work for LT tyres. The big issue for vans is the cheap crap tyres that they come with being ‘less than truthful’. LT tyres have a higher max load and pressure, and stronger and stiffer construction (to Facilitate higher load and psi ratings). If a tyre is being truthful with its ratings, the max load, max psi, weight per wheel formula will lead to the correct PSI (ie 40 in your van example). But wouldn’t trust many OEM van supplied tyres to run at 80 psi and with 6t (to max out 123 rated tyres) of van weight at 100kph.

Great video, but this is the first time I have seen the percentage symbol for the divide symbol.

That calculation and the way you explained it is the first time in my life (and I've been around for more than a few years) that the PSI has an actual meaning in my head. It is LITERALLY pounds per square inch! Amazing, thanks!

I’m confused, why does my van compliance plate say 80psi?

How do I get this going. Where's the power point .

Great !!! The Last 3 parks we rang thru to on the Christmas and New Year period , and this inland nsw and SA , not on a river, not in big towns, and not major chains parks they didn't answer or calls or our message for a return call for accommodation . Try their websites moments later , bingo a site. Unfortunately, in this entitled world these days, no one knows how to communicate on phone, welcome to the Mcdonalds era.

Genarator 1200 bucks ( chinese will do the job with 5 year warranty), rip- off 12 v dealers ,accessories suppliers , are rubbing there hands together when grey nomads are wandering in, to upgrade to a inverter system 6 to 8 k, depending on what you want to run, but min 6k just for an A/C . Unless you're 24/7 on the road, it doesn't equate. It would be like solar panels back up batteries on your home and never turning the power. Next, you will be buying electric cars to tow your 2.5 ton van and getting a maximum of 150k per charge. Dont get me wrong, l want green! But at what cost?

Great presentation. Thank you!! I have the same setup as the TerritoryX but in a Leader Gold, Dirt Roader (purchased from a different dealer). After 10,000kms on the caravan, I will say that having the Manager Alpha50 under the bed is a disaster. It gets SO hot under the bed, the mattress feels like I have an electric blanket on. I strongly recommend keeping the battery charger away from the bed, and ideally out of the main cabin of the caravan altogether. I'm currently looking for someone who is able to relocate my Alpha50.

Good info Jeb. I always put a little bit of water back into the cassette once it has been emptied and cleaned so that when I drop the sachet inside the cassette it is good to go for next use.