Hi all, I know that there is a recommended sticker on the door of the D MAX stating suggested tyre pressures for general & towing. I am just starting out with my new outfit and would appreciate what tyre pressures are suggested for the D Max and my 20ft Dual axle van. The tyre size on the D Max is 255 -65R17 & the van 245- 75R16. The pressures for the front and rear tyres on both whilst towing would be appreciated. Cheers for any info. ADDITIONAL INFO. each caravan wheel has Indepentant Alko Suspension
Rainbird Rovers
-- Edited by RAINBIRD ROVERS on Thursday 28th of April 2022 11:45:15 AM
Peter_n_Margaret said
10:43 AM Apr 28, 2022
You need to know the actual weight carried by each tyre and the maximum load @ maximum pressure for each tyre.
Cheers,
Peter
Beware of using that calculator with a NON load sharing suspension.
Cheers,
Peter
KevinJ said
11:00 AM Apr 28, 2022
Peter_n_Margaret wrote:
KevinJ wrote:
You can use the attached spreadsheet for the Van.
Beware of using that calculator with a NON load sharing suspension.
Cheers,
Peter
If you can tell me the difference for NON load sharing, I will improve the calculator.
Peter_n_Margaret said
11:11 AM Apr 28, 2022
KevinJ wrote:
If you can tell me the difference for NON load sharing, I will improve the calculator.
With NON load sharing suspension there is no way to know the actual load on each tyre unless you measure it for each wheel seperately.
Cheers,
Peter
yobarr said
12:32 PM Apr 28, 2022
KevinJ wrote:
Peter_n_Margaret wrote:
KevinJ wrote:
You can use the attached spreadsheet for the Van.
Beware of using that calculator with a NON load sharing suspension.
Cheers,
Peter
If you can tell me the difference for NON load sharing, I will improve the calculator.
Hi Kevin. As Peter says, unless you actually measure the load on each wheel there is no way to know the actual load on each tyre. However, if the non-load sharing van is level, it is important to have lower tyre pressure in the tyres on the front axle than there is in the rear axle's tyres. Cheers
Aus-Kiwi said
12:47 PM Apr 28, 2022
When new or unfamiliar with vehicle . I check the temps of tyres after a few klrs . Manufacturers specs are pretty close . The main thing is have air in them ! Not just the top . Another . Pressure gauges very ! So use your own ! So you have consistent pressures to compare ! You maybe a little too worried about it ? Enjoy your travels .,
Bobdown said
12:51 PM Apr 28, 2022
You blokes are trying to re-invent the wheel. Very few nomads pump tyres up to their max pressure, most comfortable range would be 36-38 psi.
You don't want to be driving on solid hard tyres and feel every bump in the road, common sense says a softer ride is better.
Just check that that wear is even, too high and the middle will wear first or the edges if too low pressure.
If you are running max weight/pressure, you might want to lighten the load, rather than keep putting air in.
Cheers Bob
Peter_n_Margaret said
12:53 PM Apr 28, 2022
Even with load sharing tandem axle suspension, left and right can be very different. Most RVs are heavier on the kitchen side and that needs to be accounted for with the tyre pressures.
Cheers,
Peter
DMaxer said
01:41 PM Apr 28, 2022
Hi Rainbird Rovers and welcome. I have a 2014 Isuzu D Max and tow a just under 18 foot single axle van which weighs about 2.2 tonnes loaded. I tow with 40 in the front tyres, 45 in the rear tyres and 40 on the van. I have had no issues with using these pressures.
My tug is a fairly firm ride as I also had an additional leaf fitted to the rear suspension, more of a precaution than a necessity. If going on a longer journey I also use a weight distribution hitch but it is not cranked on hard. The tug sat flat with the van on prior to either the extra leaf being added or the use of the wdh. I use the wdh because it came with the van and have found that it does improve the towing in that the steering and braking feel better.
The reason I use these pressures is that the tyre place where I purchased the tyres recommended I use those pressures.
-- Edited by DMaxer on Thursday 28th of April 2022 01:41:57 PM
-- Edited by DMaxer on Thursday 28th of April 2022 01:43:14 PM
Aus-Kiwi said
01:51 PM Apr 28, 2022
Yes it doesnt really matter what vehicle etc . Its the tyres ratting etc .
Radar said
02:21 PM Apr 28, 2022
RAINBIRD ROVERS wrote:
Hi all, I know that there is a recommended sticker on the door of the D MAX stating suggested tyre pressures for general & towing. I am just starting out with my new outfit and would appreciate what tyre pressures are suggested for the D Max and my 20ft Dual axle van. The tyre size on the D Max is 255 -65R17 & the van 245- 75R16. The pressures for the front and rear tyres on both whilst towing would be appreciated. Cheers for any info. ADDITIONAL INFO. each caravan wheel has Indepentant Alko Suspension
Rainbird Rovers
Hi,
We run similar size tyres on our Nissan Navara, towing a 2.75 tonne caravan.
Manufacturers recommend 35 front and 41 rear.
As our caravan has less weight per axle then the ute I run 36 psi and have done this for few years now with success.
Most times we only travel a few hours each day on our tours, a big days travel would be 300ks.
I generally only run 34 front, 36 rear with no noticeable heat build up or extra wear in our tyres.
Ps, I do not know what difference wdh thingys have to do with tyre pressures.
Aus-Kiwi said
09:27 PM Apr 28, 2022
On non sharing axles . I assume one tyre has to have enough pressure to hold the weight on its own ? Over high loaded bumps ? Why there pressure needs to higher or not half what a single axle is given similar weight . The same goes for the vehicle . The wheels hardly share the weight . They have seperate single axle each corner .
The Travelling Dillberries said
12:47 PM Apr 29, 2022
I have the same size tyres on my 2016 dmax, have 195x75R16 on 2.5 tonne dual axle van.
I run vehicle front at 42psi, rear 44.
Van all 45 psi, rock n roller/ spring on van.
Got 95,000km out of first set of Bridgestone 840 car tyres.
RAINBIRD ROVERS said
06:22 AM May 4, 2022
Thanks to all who responded to my post. Your info.has been taken on board. If on the road take care and safe travels.
Rainbird Rovers { Jim}
Rasty said
04:43 PM May 8, 2022
If it helps I have had 2 Dmaxs ,plus managed a Tyre shop.
I run my tyres at 40 psi on the car and 45 on the van if the load is heavier than usual ,as in away for a few months,
with all the goodies I bump up the rear car tyres to 45psi and the van 50 psi being Light truck tyres on the van as they should be.
As per another person said ,a good gauge is a must ,I have always told people that ask ,watch the wear and learn to feel the handling adjust to suit.
I have done 130000km on my 2018 Max second set of tyres not even half worn ,the van still look brand new.
All tyres are Kumho HT .
Hope this helps
yobarr said
05:30 PM May 8, 2022
Rasty wrote:
If it helps I have had 2 Dmaxs ,plus managed a Tyre shop.
I run my tyres at 40 psi on the car and 45 on the van if the load is heavier than usual ,as in away for a few months,
with all the goodies I bump up the rear car tyres to 45psi and the van 50 psi being Light truck tyres on the van as they should be.
As per another person said ,a good gauge is a must ,I have always told people that ask ,watch the wear and learn to feel the handling adjust to suit.
I have done 130000km on my 2018 Max second set of tyres not even half worn ,the van still look brand new.
All tyres are Kumho HT .
Hope this helps
Whilst I do not have your experience or qualifications, your pressures on car seem too low, and on van too high? My van has GTM of 3150-3200kg and I run 40psi in my 265/75R16 LIGHT truck tyres, which is plenty, and on the rear if my car, axle weight 2300kg, I run 52-60psi depending on my mood! Your thoughts would be appreciated. Cheers.
P.S Car runs 265/75R16 LT tyres too. Only 36psi on front axle as it weighs 1350kg with 350kg towball weight.
-- Edited by yobarr on Sunday 8th of May 2022 05:32:51 PM
Hylife said
10:01 PM May 30, 2022
Ignore the tyre placard, this is only valid for the OEM tyres that were fitted to the vehicle as it left the factory line with no load.
Unless you can tell us what is written on the tyre sidewall and the weights on each axel any advice here is both wrong and dangerous.
The formula for calculating pressures has been stamped onto your tyres for over 40 years in an effort to try to stamp out this very type of question.
More weight = more pressure,
Less weight = less pressure.
The pressure is stamped as max pressure XXX PSI at XXXXkg (per tyre)
diggerop said
09:50 AM May 31, 2022
If you are not using a weight distrubition hitch there will be less weight than normal on the front tyres so you could/may air down the front tyres a bit.
Hi all, I know that there is a recommended sticker on the door of the D MAX stating suggested tyre pressures for general & towing. I am just starting out with my new outfit and would appreciate what tyre pressures are suggested for the D Max and my 20ft Dual axle van. The tyre size on the D Max is 255 -65R17 & the van 245- 75R16. The pressures for the front and rear tyres on both whilst towing would be appreciated. Cheers for any info. ADDITIONAL INFO. each caravan wheel has Indepentant Alko Suspension
Rainbird Rovers
-- Edited by RAINBIRD ROVERS on Thursday 28th of April 2022 11:45:15 AM
Cheers,
Peter
You can use the attached spreadsheet for the Van.
Beware of using that calculator with a NON load sharing suspension.
Cheers,
Peter
If you can tell me the difference for NON load sharing, I will improve the calculator.
With NON load sharing suspension there is no way to know the actual load on each tyre unless you measure it for each wheel seperately.
Cheers,
Peter
Hi Kevin. As Peter says, unless you actually measure the load on each wheel there is no way to know the actual load on each tyre. However, if the non-load sharing van is level, it is important to have lower tyre pressure in the tyres on the front axle than there is in the rear axle's tyres. Cheers
You blokes are trying to re-invent the wheel. Very few nomads pump tyres up to their max pressure, most comfortable range would be 36-38 psi.
You don't want to be driving on solid hard tyres and feel every bump in the road, common sense says a softer ride is better.
Just check that that wear is even, too high and the middle will wear first or the edges if too low pressure.
If you are running max weight/pressure, you might want to lighten the load, rather than keep putting air in.
Cheers Bob
Cheers,
Peter
Hi Rainbird Rovers and welcome. I have a 2014 Isuzu D Max and tow a just under 18 foot single axle van which weighs about 2.2 tonnes loaded. I tow with 40 in the front tyres, 45 in the rear tyres and 40 on the van. I have had no issues with using these pressures.
My tug is a fairly firm ride as I also had an additional leaf fitted to the rear suspension, more of a precaution than a necessity. If going on a longer journey I also use a weight distribution hitch but it is not cranked on hard. The tug sat flat with the van on prior to either the extra leaf being added or the use of the wdh. I use the wdh because it came with the van and have found that it does improve the towing in that the steering and braking feel better.
The reason I use these pressures is that the tyre place where I purchased the tyres recommended I use those pressures.
-- Edited by DMaxer on Thursday 28th of April 2022 01:41:57 PM
-- Edited by DMaxer on Thursday 28th of April 2022 01:43:14 PM
Hi,
We run similar size tyres on our Nissan Navara, towing a 2.75 tonne caravan.
Manufacturers recommend 35 front and 41 rear.
As our caravan has less weight per axle then the ute I run 36 psi and have done this for few years now with success.
Most times we only travel a few hours each day on our tours, a big days travel would be 300ks.
I generally only run 34 front, 36 rear with no noticeable heat build up or extra wear in our tyres.
Ps, I do not know what difference wdh thingys have to do with tyre pressures.
I have the same size tyres on my 2016 dmax, have 195x75R16 on 2.5 tonne dual axle van.
I run vehicle front at 42psi, rear 44.
Van all 45 psi, rock n roller/ spring on van.
Got 95,000km out of first set of Bridgestone 840 car tyres.
Rainbird Rovers { Jim}
If it helps I have had 2 Dmaxs ,plus managed a Tyre shop.
I run my tyres at 40 psi on the car and 45 on the van if the load is heavier than usual ,as in away for a few months,
with all the goodies I bump up the rear car tyres to 45psi and the van 50 psi being Light truck tyres on the van as they should be.
As per another person said ,a good gauge is a must ,I have always told people that ask ,watch the wear and learn to feel the handling adjust to suit.
I have done 130000km on my 2018 Max second set of tyres not even half worn ,the van still look brand new.
All tyres are Kumho HT .
Hope this helps
Whilst I do not have your experience or qualifications, your pressures on car seem too low, and on van too high? My van has GTM of 3150-3200kg and I run 40psi in my 265/75R16 LIGHT truck tyres, which is plenty, and on the rear if my car, axle weight 2300kg, I run 52-60psi depending on my mood! Your thoughts would be appreciated. Cheers.
P.S Car runs 265/75R16 LT tyres too. Only 36psi on front axle as it weighs 1350kg with 350kg towball weight.
-- Edited by yobarr on Sunday 8th of May 2022 05:32:51 PM
Unless you can tell us what is written on the tyre sidewall and the weights on each axel any advice here is both wrong and dangerous.
The formula for calculating pressures has been stamped onto your tyres for over 40 years in an effort to try to stamp out this very type of question.
More weight = more pressure,
Less weight = less pressure.
The pressure is stamped as max pressure XXX PSI at XXXXkg (per tyre)