Tyre Pressures and chart

by Backtrax Sat Oct 05, 2013 9:55 am

Forgive me for seeming daft, but I cannot seem to interpret the Tyre Pressure chart that has been posted and referred to many times.
I am unsure where the table for CP tyres shows front driven wheel pressures.
My Broadway is on a Peugeot Boxer front wheel drive, single rear axle base.
Tyres fitted are Continental 215/70 R15CP (109R)
Axle loading is - Front 1500Kg Rear 1800Kg

Would any of the more experienced members please advise what pressures you would interpret the chart to be recommending.

Thanks

by Paulmold Sat Oct 05, 2013 10:08 am

You are not daft at all. I've not had CP tyres on my van before so the light commercial chart was the one for me and that appears straight forward. I've now got CP tyres on my new-to-me Nuevo and I admit I too am confused by the CP chart. I'll see what I can find out, if nothing then I suggest an email to the tyre manufacturers quoting your axle weights (not the max on your weight plate, but actual from a weighbridge with your van loaded up ready for a trip).

by Backtrax Sat Oct 05, 2013 10:17 am

Paulmold,
Thanks for you quick reply.
I was rather hoping you would get involved, since you seem to have been at the centre of most other threads I have read on this topic.

Having repeatedly studied the chart and getting nowhere I was beginning to think I had lost the plot!!

I have as you suggested sent an email to Continental Tyres UK giving them all the tyre and weight details.
I also just tried to ring them on the number published on their web site, but got 'NU' tone. I shall try again on Monday.

I shall keep you posted on any response I get and would appreciate any further input you are able to find out.

by Backtrax Tue Oct 08, 2013 9:40 am

I have just spoken to some very helpful people at Continental Tyres uk regarding recommended pressures for their tyres.

My Broadway is fitted with Continental 215/70 R15CP tyres all round.

My touring weight is 3300 Kg - Front 1500Kg and Rear 1800Kg.

The pressures they have given me are Front 3.25bar (47.10 psi) and Rear 4.75bar (68.80 psi)

This is way adrift from what I have been running with - particularly the large difference front to rear.

I did question the figures re it being front wheel drive vehicle and also that the tyres are marked for a max pressure of 69 psi.

They said these pressures are correct and not to worry about the max 69psi since this is just for 'American market requirements' - whatever that means!

They are going to send me their data book which gives figures for all their tyre sizes which I shall scan and submit for publication on the forum.

by mikethebike Tue Oct 08, 2013 6:14 pm

Backtrax wrote:Forgive me for seeming daft, but I cannot seem to interpret the Tyre Pressure chart that has been posted and referred to many times.
I am unsure where the table for CP tyres shows front driven wheel pressures.
My Broadway is on a Peugeot Boxer front wheel drive, single rear axle base.
Tyres fitted are Continental 215/70 R15CP (109R)
Axle loading is - Front 1500Kg Rear 1800Kg

Would any of the more experienced members please advise what pressures you would interpret the chart to be recommending.

Thanks
Hi Backtrax,
Yes its a minefield. 44 threads on this subject!!
I would suggest IMO that 58 front and 68 rear would be adequate.
I assume you have got these axle wts from a weighbridge.
Tyre pressures are always a compromise.
Its most important to check pressures regularly as low pressure is dangerous.
Low pressure heats the tyre up and can cause it to fail.

Hope this helps
Mike

by Backtrax Wed Oct 09, 2013 1:09 pm

I have now received the 2013 : 2014 Technical Databook from Continental tyres.
This provides recommended tyre pressures for all sizes and types of tyre in their portfolio and for a range of front and rear axle loads.

The book is over 100 pages, so I do no t propose to scan all of it.

For now I have scanned the 4 double pages which deals with all CP and most C tyres.
I shall get this posted in the technical section of the forum for anyone interested.

mod edit: these are posted in factsheet section so the data doesnt get "lost" in posts - roli

by AlanT Fri Oct 11, 2013 11:28 am

Hi Backtrax

I'm very interested to see the Continental tech data, but haven't been able to see your posting in the Technical Section, possibly I'm being a bit premature?

Please would you post here a link to your scanned docs once available?

Many thanks
AlanT allthumbz

by **roli** Fri Oct 11, 2013 12:37 pm

The Continental Tyre Data has been posted in the Factsheets section for anyone interested

by mikethebike Fri Oct 11, 2013 1:00 pm

Hi , That's no change for my Symphony.
Still comes out at 44 or 3 bar. That's what Auto Sleeper had for my vehicle.

thanks
Mike

by AlanT Fri Oct 11, 2013 2:16 pm

Thanks, Backtrax. Just the job!

Best Wishes
AlanT

by daveH Sun Oct 13, 2013 9:53 pm

Hi guys, I've got a 2005 Auto-Sleeper Symbol - can anyone tell me what the front and rear tyre pressure should be?

Many thanks for any help you can give.

Dave

by **roli** Sun Oct 13, 2013 10:01 pm

Read the pressure chart that is posted in the factsheet section and mentioned in the above postings

by daveH Mon Oct 14, 2013 9:43 am

Hi roli,

I've looked at the chart but it doesn't make much sense to me. I thought that if you owned a Peugeot Auto-Sleeper Symbol then there would be a set of figures for front and rear tyre pressures as there is with cars?

Dave

Castle Douglas

by mikethebike Mon Oct 14, 2013 1:32 pm

Hi DaveH,
Not that simple. You should have your tyre pressures recorded in one of your door areas.
Its also noted in your handbook.
However many people like to use a pressure related to the load carried.
To use that chart you need to know your tyre size and axle loading front and rear.
Hope this helps.
regards
Mike

by Backtrax Mon Oct 14, 2013 3:02 pm

DaveH,
Beware of the tyre pressures stamped on labels in the door area.
These are often pressures related to the maximum load of the base vehicle.
As mike has said, the pressure to use is the one related to the axel load and on the specific make and size of tyre.

Ken

by Backtrax Mon Oct 14, 2013 3:03 pm

ps
This is no different to cars - they too have different pressures for different loading

by daveH Wed Oct 23, 2013 9:11 pm

Hi guys,

I had my Symbol weighed today to determine the front and rear axle loadings in order to get the correct tyre pressures. Now I require a copy of the chart that mike the bike refers to - how do I get hold of the relavent section of the chart?

Dave

by mikethebike Wed Oct 23, 2013 9:30 pm

members fact sheet section.

Mike

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