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Can anyone give me there understanding on the appropriate Tyre pressure for my new Prado 150 when towing my caravan to 2500 ATM. I only have the stock standard tyres on my car since its purchase new in 2015
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This will be entertaining, I'll put my 2 cents in. By the way there are a few threads about this.
Using tyre temperature as a guide, which is what kills tyres, I've ended up running around 45 psi front and 50 psi rear when fully loaded and towing on open highways.I run 40 psi front and back in town.Last edited by krypto; 03-03-2016, 09:08 AM.[B]Steve[/B]
2010 Silver GXL Prado 150, D4D Auto, with a few non standard bits -
Wow, I have been advised on the owners forum in a thread about fuel economy that I should be running between 36 and 42 psi depending on load.
I have covered only 7000 Km,s in my 2015 Prado 2.8 and the average consumption is 9.3 L/100Km according to the dash. It is a manual and mostly suburb driving including some towing.
This is the first Prado I have ever owned, until I read this and similar threads I had obeyed the sticker on the drivers side door and the handbook which quotes 200 kpa, 2.0 bar, 29 Psi this is recommended for loaded or not. Don't shout at me I am just saying what the book says!Comment
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We are talking about towing on the open road. You can run 30 psi but your tyres will deform more generating more heat. Soft tyres also perform a lot worse in heavy braking or evasive manoeuvres. The 4psi rule is a good way to find the right pressure; pressure difference from stone cold to fully hot should be around 4 psi.[B]Steve[/B]
2010 Silver GXL Prado 150, D4D Auto, with a few non standard bitsComment
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Hi JL,
tjere is lots and lots of discussions tyre pressures on this forum, if the posts are still there. The placard tyre pressures are definitely designed for down town Tokyo and for comfort, not necessarily for tyre longevity etc. I ran 42psi for just normal driving unloaded, and got over $100,000km out of tyres, with 5 tyre rotation. I also towed a 2.5 t boat on occasions, but I didn't got quite as high as 50psi, but it was a dual axel trailer, and didn't have 250kg of downforce on the rear as you might expect for a trailer carrying 2.5 tonnes.
You will be looking somewhere between 40 and 50 psi for loaded rear tyre pressures when towing...depending on what downforce you have on the tow bar and what load you have in the back of the Prado.
SE Qld: GX 150GD Auto, (Feb'16 build): TJM T15 steel b bar, 9,500lb TORQ winch, TJM s steps, Rhino Pioneer Platform (42102B 1928X1236mm), front recovery points, Wynnum towbar, P3 brake controller, TNN Underbody guards, UHF, TREKtable & LED striplight, Custom Fridge & Drawers, Waeco CFX50, 9inch illuminator 160W LED spots, 40mm lifted Dobinson Suspension (Zordo's), ScanguageII, 30 Sec Wing AwningComment
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Ask any tyre shop and they will tell you that anything that weighs 2.5T (most 4WDs) should never have less then 40psi in the soft two ply tyres they come with. If you upgrade to LT tyres than you can run lower pressure around 36.
I use the 4 psi rule and settle on 39psi unloaded. But loaded for me is a box trailer for camping so not enough to consider a pressure change.[CENTER][B]-=2014 GXL D4D Auto Graphite, Firestone Airbags, ARB/Optima D34 Dual Battery, ARB UVP, TJM Airtech Snorkel[/B][B]=-[/B]
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Sounds like I am on the right track with the pressures then. I have the rears 44psi in the rear and 40psi in the fronts when towing my van 2500. Around town I drop them to approx 38psi.Comment
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Learnt something here. Good thread
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