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Post Info TOPIC: Tyres AGAIN
dave48


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Tyres AGAIN
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I know this subject has been done to death but I have a query. The tyres on our motorhome are supposed to be run at 80 psi. I understand if I go down corrugated roads etc it's good sense to reduce this. As we are about to set off for the best part of the year travelling my question is this. How do you pump up the tyres again when you get to the sealed roads. Got a small compressor on board for emergencies but I doubt there are many compressors that can go that high. Thanks for any thoughts in advance

Dave



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Peter_n_Margaret


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You need a decent compressor.

Is 80psi really correct for the highway pressures?

You don't tell us what your rig is. There are a variety of compressor options depending on space, weight, existing equipment and budget.

Cheers,
Peter



-- Edited by Peter_n_Margaret on Sunday 3rd of April 2016 12:49:49 PM

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OKA196, 4x4 'C' Class, DIY, self contained motorhome. 960W of solar, 400Ah of AGMs, 310L water, 280L fuel. https://www.oka4wd.com/forum/members-vehicles-public/569-oka196-xt-motorhome
 

 
Aus-Kiwi


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Aim for compressor rated at 150 lb . Even some stations don't have pressures higher than 80 lb ..

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dave48


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Thanks guys and yes peter some info would help. It's a Knaus Skywave 650mf and that's correct 80 psi. Checked everywhere and it is correct. I have a little 12V compressor Aus-Kiwi and it's rated up to 300psi but do they really do that. Used it once to pump a car tyre to 30psi and it worked ok. But 80 is a bit different

Dave7993.jpg



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Woody n Sue


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May I suggest the obvious Dave Hook up your compressor to one of your tyres the spare for instance and see if it will put more pressure in your tyre that should answer your question.
and I see no reason that 80 psi would not be correct what some people seem to forget is that the tyres do NOT hold up your car / bus /van ect they hold the air that holds it all up
Woody

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dave48


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You know Woody. I think that's the nicest way I've been called an idiot. And you are right. Ha Ha Ha . Sometimes the answer is so simple we don't even think about it. Thanks
Dave

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Woody n Sue


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That's ok Dave some times we can't see the trees for the forest may suggest that you have the compressor running before connecting it to the tyre due to the high starting pressure
Woody


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Peter_n_Margaret


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dave48 wrote:

Thanks guys and yes peter some info would help. It's a Knaus Skywave 650mf and that's correct 80 psi. Checked everywhere and it is correct. I have a little 12V compressor Aus-Kiwi and it's rated up to 300psi but do they really do that. Used it once to pump a car tyre to 30psi and it worked ok. But 80 is a bit different

Dave

 My brief searches suggest this vehicle has 215/70R15CP tyres fitted. Is this correct? Are the rears single or duals?

http://www.knaus.de/en/motorhomes/sky-wave/layout-plans/650-mf.html

Those tyres have a load rating of 109, a maximum load of 1030kg each at a maximum of 65psi.

All of this information will be on the sidewall of the tyre. Please check it.

That vehicle also has a maximum weight of 3,500kg. Do you know what it actually weighs, front axle and rear axle separately?

 

Cheers,

Peter



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OKA196, 4x4 'C' Class, DIY, self contained motorhome. 960W of solar, 400Ah of AGMs, 310L water, 280L fuel. https://www.oka4wd.com/forum/members-vehicles-public/569-oka196-xt-motorhome
 

 
dave48


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Single rear axle and they are 225/75 R16CP. Fully loaded with everything in it I put it on the weigh bridge and it was 3800 kg. It's rated up to 4250kg.
Dave

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Peter_n_Margaret


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Can you read the tyre maximum load/pressure information written on the tyres?
You are 400kg below the maximum weight of the vehicle and the tyres have a max load of 1250kg each (5T for the vehicle if all loaded fully).

Cheers,
Peter


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OKA196, 4x4 'C' Class, DIY, self contained motorhome. 960W of solar, 400Ah of AGMs, 310L water, 280L fuel. https://www.oka4wd.com/forum/members-vehicles-public/569-oka196-xt-motorhome
 

 
dave48


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Hi

Don't know whether this is too late but we had a minor hiccup with the grandkids that had to be sorted out. SO Peter I apologise for ignoring your post but family comes first.

The tyres are stamped on the side ( very small writing ) for 80 psi.

Dave



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