Michelin Tyre Pressures (1 Viewer)

Oct 27, 2013
711
10,912
Portglenone, Northern Ireland.
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28,765
MH
Elddis Magnum185GT
Exp
Since July 2012
Just had an e-mail back from Michelin after asking about pressures in Agelis 225/70 R15 CP. Max plated weight is front axle 1850, rear 2000. Gave them loaded weight of approx. 1600-1650 front & at or near limit on the rear. They came back with 80psi for the rears, so no surprises there, but to try 65psi on the fronts & see how it feels to drive, with the option of going down to a minimum of 50psi. Just thought that if anybody is running these the info might be useful as there seemedr to be some confusion on whether it was 80psi all round. (Plus I wanted to know what to set the new TyrePal to ;))
Chris
 
Feb 22, 2011
9,631
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Newcastle under Lyme
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MH
Hymer B544 A Class
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Since 2015
80psi seems to their stock answer no matter what info you give them regarding weights etc.
I dropped mine to 70psi in search of a softer ride but no sure whether to go lower ?
 

treetops1

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Feb 25, 2013
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yorkshire/ lincolnshire.
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Sold last van-
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a long time,since 1996
4 bar front 5 bar rear it works for me lol. That is cold

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Last edited:
OP
OP
Ninovan
Oct 27, 2013
711
10,912
Portglenone, Northern Ireland.
Funster No
28,765
MH
Elddis Magnum185GT
Exp
Since July 2012
80psi seems to their stock answer no matter what info you give them regarding weights etc.
I dropped mine to 70psi in search of a softer ride but no sure whether to go lower ?

I would have thought that if you went too low with high(ish) weight, the sidewalls would flex more & they would run hotter. That's why the front & back pressures are different, most of the weight is on the back.
 
D

DL42846

Deleted User
This was a reply I had from Michelin recently. I did try running my MH at 65 psi but the steering felt heavy and woolly, so I went back to 70 pis front and 80 psi rear.
For my van with 1440 kilo on the front axle and 1880 on the rear it feels fine and I will stick with that.

The plot thickens.
This is a copy of what I have just received from Michelin support in response to one of my five emails I have sent them.
So it looks like the front tire pressures can be reduced to 4.5 bars (65 psi) to give a more comfortable ride

Hello Michael,


Thank you for contacting MICHELIN Customer Service!



First off apologies for the lack of response from our part. I have checked in our systems for any emails received from you and since there aren´t any I suppose that there must have been some sort of technical issue in receiving your messages.



Secondly, the following recommendation is only given if your motorhome is equipped with MICHELIN Agilis Camping with metal valves.



The recommended tyre pressure for the rear axle of a motorhome running on the MICHELIN Agilis Camping is 80 psi. Its reinforced construction and the use of higher pressures is designed to cope with continual heavy loads sometimes found on motorhomes and can help with wear pattern issues if lower pressures are used particularly on the rear axle.
The front tyres however can be adjusted to a pressure of 65 psi for a more comfortable ride and optimum performance.



I hope this information is helpful to you and please don´t hesitate to contact us again if you have anymore questions or concerns. We will be happy to help.


Kind regards,


Vassilena


MICHELIN Customer Service
Tel: 0845 366 1590
 

Lorryman100

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Nov 29, 2015
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I run our A class at 80psi in the rear which is plated at 2200kgs and runs close to maximum weight most of the time. The front is plated at 1850kgs but we would be overweight if we ran at this weight. The front weight usually comes in around 1600kgs and after playing around with the pressures now run at 75psi. I tried as low as 65 and as high as 80 psi but found that 75psi gives the best ride and the chalk test shows even tread across the width as does the tyre depth gauge.

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Sep 28, 2015
1,991
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Kingston upon Hull, East Yorkshire.
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MH
Hymer B544
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2001 Caravans 2011 Motorhomes
Try looking at Continentals technical data sheet for a good guide. Michelin don't appear to do one, I can't see there being any difference between the makes so long as you look at the same sizes.
It gives all the pressures for all the sizes at different weights for front and rear, including twin rear wheels if necessary.
 
D

DL42846

Deleted User
My Motor home has the recommended tire pressures marked on a label just inside the drivers door. the Motor home came originally with Conti Vanco tires. both Michelin and Conti recommended pressures are the same according to Fiat.

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Lenny HB

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Oct 18, 2007
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We are on the Al-Ko maxi chassis with 16" wheels 225 width Michelins, recomended pressurers are front 65 psi, rear 80 psi at that it was a bone shaker. We are only running at 1930kg on the front and 2100 kg on the rear well below the max. I've dropped the pressurers to 60 psi front & 70 psi rear, ride is much better but still a bit harsh.
 

bigtwin

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Oct 29, 2009
5,153
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The Michelin recommended pressures (when I provided them with the axle weights) for my tag axle are:

Front 1726kg - 54psi
Intermediate 1358kg - 72psi
Rear 1336kg - 72psi

That's against plated weights of:

5000 Gross
2000 Front
1500 Rear 1
1500 Rear 2

It's interesting to note that for the rears, the recommended pressures are almost exactly the ratio that the actual versus (i.e. 1350/1500 x 80 psi = 72psi). The equivalent ratio for the fronts don't work but I guess that's because the weight/pressure relationship isn't linear as weight/pressure lowers.

Ian

Edit 1: Actual &plated weights added.
Edit 2: relationships added
 
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JFD

Apr 9, 2015
392
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Crawley Down, West Sussex, UK
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Pilote Aventura G730
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since 2014!
When we bought 'Eric' (a Rapido 746f), he came with, amongst other papers, a copy of a letter from the Michelin Technical Support group at Stoke-on-Trent.

This suggested the following pressures, based on 215/70 R 15CP tyres:
axle weight F 1742kg 54psi
axle weight R 1750kg 54psi

They also said that "to help the front tyres cope more easily with the weight transfer under braking", the front tyres could be inflated by an extra 10%, giving their final recommended pressures of:

Front 59psi
Rear 54psi

I have followed these recommendations, and not suffered any issues (yet!), including no excessive increase in pressure or temperature, as shown on the Tyrepal we have fitted.

These pressures seem a long way below those being discussed above, and regularly elsewhere on this forum.

Any comments??

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bigtwin

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Oct 29, 2009
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This suggested the following pressures, based on 215/70 R 15CP tyres:
axle weight F 1742kg 54psi
axle weight R 1750kg 54psi

These pressures seem a long way below those being discussed above, and regularly elsewhere on this forum.

Any comments??

Your axle weights pretty much match the same weight as my front seat in the preceding post and have the same recommended pressure.

I wouldn't want to be running the higher pressures that many other quote.

Ian
 

funflair

LIFE MEMBER
Dec 11, 2013
19,196
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Guisborough
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29,351
MH
MORELO palace
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since 2012
When we bought 'Eric' (a Rapido 746f), he came with, amongst other papers, a copy of a letter from the Michelin Technical Support group at Stoke-on-Trent.

This suggested the following pressures, based on 215/70 R 15CP tyres:
axle weight F 1742kg 54psi
axle weight R 1750kg 54psi

They also said that "to help the front tyres cope more easily with the weight transfer under braking", the front tyres could be inflated by an extra 10%, giving their final recommended pressures of:

Front 59psi
Rear 54psi

I have followed these recommendations, and not suffered any issues (yet!), including no excessive increase in pressure or temperature, as shown on the Tyrepal we have fitted.

These pressures seem a long way below those being discussed above, and regularly elsewhere on this forum.

Any comments??
They look a bit low to me as well based on the rule of thumb axle weight/Max axle weight from load ratingX Max pressure

Assuming yours are 109 rated =2060 for the axle so 1750/2060X80 = 68psi.

EDIT after posting this I was checking it against the Continental recommended pressure for the same size/load rating tyre and that agrees with your figures from Michelin so feel free to totally ignore me on this occasion(y)

Martin
 
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bigtwin

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Oct 29, 2009
5,153
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They look a bit low to me as well based on the rule of thumb axle weight/Max axle weight from load ratingX Max pressure

Assuming yours are 109 rated =2060 for the axle so 1750/2060X80 = 68psi.


Martin

I'd rather use the manufacturer recommended pressures than a rule of thumb calc though.

Ian

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funflair

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Dec 11, 2013
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I'd rather use the manufacturer recommended pressures than a rule of thumb calc though.

Ian
Agreed but it usually work out very close to the recommendation from the manufacturers, but not this time(y)

I have a table of pressure vs load rating from Continental that agrees with the OP and the Michelin pressures so will add it if I can.

Martin
 
Jul 29, 2013
9,048
18,078
Salisbury
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27,215
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Hymer B678DL A class
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since 2011
4.5/65 front 5.5/80 rear as recommended in my Hymer handbook for Michelin and that's what I run them at.
I find that works well for us on an Exsis I 698 with front 2100kg rear 2400 kg on 225x75 16" Agilis camper we also have air assist on rear which makes it less bumpy

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