Tyre pressure advice please

[Camper634]

I have had the pressures at about 69 psi from new on my 3.5 ton autotrail but read somewhere it should be nearer 80.I have increased the pressure to 80 and although the MPG seems to have improved the ride hasn't,and it feels hard,is you feel every bump.Any advice please on what pressure is best.Maybe somewhere between the 2?

 

[Jaws]

I have had the pressures at about 69 psi from new on my 3.5 ton autotrail but read somewhere it should be nearer 80.I have increased the pressure to 80 and although the MPG seems to have improved the ride hasn't,and it feels hard,is you feel every bump.Any advice please on what pressure is best.Maybe somewhere between the 2?

When we had a similar van we ran at 65 all the time as that is what the converters said.
Check in the Swift manual as it is the only place the info for your van will be correct

 

[Riverbankannie]

If you know your axle weights, you can ring the tyre manufactures help line and get accurate pressure information.
Mine are Continental Vanco and although running at 3400kg total, the pressure given were 45psi rear and 48psi front which actually we find a bit low so we do put 55 in.

 

[Gellyneck]

We've got a 2013 AT Frontier Savannah (4,250kg) and run at 69psi front and 80psi rear.
Whilst the handbook says 80psi all round that has to be generic as the handbook covers the full Frontier range, including the tag axle models.
So, and as @Riverbankannie says, I looked at the Continental technical databook and used those recommendations (adjusted slightly as the axle weights aren't exact matches and to trim the ride comfort).
I've attached an extract of the page \ data I used.

 

[MikeD]

Our 3.65ton Tracker was 5 bar at the front and 5.5bar at the rear.

The manufacturers recommended pressures should be in the Autotrail manual.

^{_{Subscribers  do not see these advertisements}}

 

[Hettie's Crew]

Tyre pressures are such an individual thing that depends on tyre/wheel size and axle weight which is variable from motorhome to motorhome according to what you carry, equipment, how many of you there are and tyre type.
Asking others with similar motorhomes isn’t any help really.
The only way to know is to get weighed, front and rear axle, when loaded as if ready for a trip.
Then you are either in the “motorhome tyres must be pumped up hard” club or not.
Personally I’m not and prefer to listen to Continentals advice so we are 3.25 bar front and 4.25 bar rear.
If you choose the “pump em up hard club” then it’ll be 65psi front and 80psi rear regardless of your weights.

 

[Sheddy]

Get the weight of the axles and use this
https://www.tyresafe.org/check-your-pressures/motorhomes/
Cheers
Ed

 

[TCG]

We've got a 2013 AT Frontier Savannah (4,250kg) and run at 69psi front and 80psi rear.
Whilst the handbook says 80psi all round that has to be generic as the handbook covers the full Frontier range, including the tag axle models.
So, and as @Riverbankannie says, I looked at the Continental technical databook and used those recommendations (adjusted slightly as the axle weights aren't exact matches and to trim the ride comfort).
I've attached an extract of the page \ data I used.

agree with gellyneck.. AT delaware 70psi front 80psi rear - works for me

 

[Camdoon]

We found out our axle weights and wrote to Continental who were happy to tell us the recommended pressures. Mine are 3.75 and 5.25 which just happen to be floppy disk sizes (that is an aide memoire - I have not fitted floppy disks).

 

[JFD]

I would follow Camdoon’s advice, and write to the manufacturers of your tyres, with details of your motorhome weights.

We have a letter from Continental, quoting pressures for our motorhome, including a surprising piece of advice, to increase the pressures in the front tyres, to counter the weight shift during braking!

^{_{Subscribers  do not see these advertisements}}

 

[PeteH]

The suggested Front /Rear pressures for our Rapido is 47/55psi. However They currently run Front 60psi Rear 70psi Cold. (R235/65 R16) Continentals Tyre Pal Monitored.

 

[DL42846]

Our 3.5 ton fiat Ducato runs on 5 bar (72 psi) front and 5.5 bar ( 80 psi) rear. YOu should find the tyre pressure recommendations on the inside of the drivers or passenger door. I also emailed Michelin head office and double checked. They confirmed the above pressures were correct.

 

[Augusta08]

We've found temperature makes a profound impact. Our 4,500kg x250 has a "target" of 75psi front 80psi rear , on Michelin Agilis 225 75R16. The cold (5C) pressures are 67 & 73 respectively, when running they soon hit pressure. When it's warmer they quickly get up to 77 & 84. For me I need to adjust pressures to the environment and purpose. The 118 tyres are rated at 1250kgs at 75psi.

HTH

Gerry

 

[Reallyretired]

I use the recommended pressures from the tyre manufacturer for our axle weights. 54psi front 69psi rear. I doubt if any two motorhomes have the same correct pressures which depends on the tyres and the actual loading. The tyre manufacturer will tell you what your pressure should be once you've weighed each axle.

 

[denisejoe]

Check the tyres for the max pressure they can take our toyo’s Have a max pressure of 70 psi but we run at 50 psi

^{_{Subscribers  do not see these advertisements}}

 

[Techno]

I make sure mine look round

 

[pappajohn]

Ask your insurers, after all if you have an accident and the assessor/loss adjuster decides they were over/under inflated they may hold you partly responsible so they must know the pressures.

 

[glenn2926]

Blow them up nice and hard, but not too hard.
I think that’s about right.