High tyre pressures (1 Viewer)

[Bart]

So our mh weighs in just shy of 3850kg fully loaded and it is fitted with Michelin Agilis camping tyres 215/75 R15 with metal valves and to monitor the pressures I use a pace tyre monitor.
I have the rears inflated to 80psi and the front to 60psi since when we were in the UK
Well now we are in France touring and it is slightly warmer than in the UK and I have noticed the rear tire pressure monitor showing the pressure at 88psi.
Is this still OK ???
As I'm worried that something might go pop

 

[WillH]

IMHO your tyres are well too high, I have the same van and run 55psi front and rear. You must bounce all over the place.

 

[Sheddy]

Try this
https://www.tyresafe.org/check-your-pressures/motorhomes/
You may be a bit surprised how low your pressures should be.
Cheers
Ed

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

 

[Stealaway]

Mine were set by the Costco Michelin specialist's at 72 front and 80 rear. I'll take its their best advice. 55 sound's very low for camper tyres. Burstner T660 3.5 tonnes.

 

[Stealaway]

Try this
https://www.tyresafe.org/check-your-pressures/motorhomes/
You may be a bit surprised how low your pressures should be.
Cheers
Ed

Yep - pretty much correct

 

[WillH]

I'm running on Vanco Campers, took about a year to get the pressures right working with a local tyre fitter. We have excellent handling, lower noise, and very even wear. No overheating even on autoroute runs in a hot summer.

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

 

[Yorick]

I have same tyres and Michelin told me to run 65 front and 75 rear. I only ever believe the tyre maker. They do make them, so do know what's best

 

[Bart]

IMHO your tyres are well too high, I have the same van and run 55psi front and rear. You must bounce all over the place.

Do you have it near 3850kg most of the time as with 2000kg in the rear the tires still look a bit flat looking when at 80psi.
When I use that guide that @Sheddy linked the tires that are closest to my size 70 instead of 75's the pressures are still being recommend as 80 for the rear and 68 for the front.

 

[Bart]

I have same tyres and Michelin told me to run 65 front and 75 rear. I only ever believe the tyre maker. They do make them, so do know what's best

I gave up trying to get this information after 3 emails and no reply.

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

 

[Bart]

I have same tyres and Michelin told me to run 65 front and 75 rear. I only ever believe the tyre maker. They do make them, so do know what's best

BTW what is your axle weights usually

 

[WillH]

I run a little over 3500kg. Got fed up with the hard ride and poor handling.

 

[PP Bear]

Michelin Safety Data Sheet.

Worth a read regarding motorhome tyres, especially the part that talks about the under inflation of tyres and how it equates to load.

Page 4 covers motorhome's.

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

 

[Mr Chrysalis]

I got a quick reply from Michelin. My Agilis are 225/75/15 112. My weights are 1950 rear, 2240 front, 4000 total. Michelin advice is 65 front and 80 rear. Note that these are COLD pressures, and should be set when you have not been driving it for more than a mile or so. It is normal for them to increase in pressure ( by about 10%) as the temperature increases. At 70mph, mine typically get up to 72 and 90 at around 30-35deg C. I have my TyrePal alarm set at 15% high and 20% low and they don’t reach that.

 

[Reallyretired]

No doubt Michelin know what they are talking about, and my tyres are Continental and the advice is, not surprisingly, totally different. However I am surprised that the tyres with the least load have the highest pressures, I would expect the other way round as mine are.

 

[Bart]

I got a quick reply from Michelin. My Agilis are 225/75/15 112. My weights are 1950 rear, 2240 front, 4000 total. Michelin advice is 65 front and 80 rear. Note that these are COLD pressures, and should be set when you have not been driving it for more than a mile or so. It is normal for them to increase in pressure ( by about 10%) as the temperature increases. At 70mph, mine typically get up to 72 and 90 at around 30-35deg C. I have my TyrePal alarm set at 15% high and 20% low and they don’t reach that.

Thanks I'm glad to see them say a 10% increase in pressure is normal

No doubt Michelin know what they are talking about, and my tyres are Continental and the advice is, not surprisingly, totally different. However I am surprised that the tyres with the least load have the highest pressures, I would expect the other way round as mine are.

I'm sure he prob just got it mixed up as the higher the load = more pressure

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