Tyre Pressures - 15" wheels

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vwJim
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Re: Tyre Pressures - 15" wheels

Post by vwJim » Tue Jun 27, 2017 9:07 am

I had a panel van with only a rock & roll seat in the back on the MOT brake test equipment yesterday, which weighs the vehicle.

Half a tank of fuel and me in it.

Front was 520kg.

Rear was 575kg.



Front tyres fitted are have a maximum inflation pressure of 44psi, and maximum load of 550kg

Rear tyres fitted are have a maximum inflation pressure of 44psi, and maximum load of 550kg



Now the calculation for just half full of fuel & driver;

Front Ratio = (2x 550)/520 = 1,100/520 = Front 2.12

Maximum pressure = 44/2.12 = 21 psi front tyre pressure when not loaded



Rear Ratio = (2x 550)/575 = 1,100/575 = Rear 1.91

Maximum pressure = 44/1.91 = 23 psi rear tyre pressure when not loaded


MUCH lower than would of expected....
Last edited by vwJim on Tue Jun 27, 2017 9:43 am, edited 3 times in total.
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vwJim
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Re: Tyre Pressures - 15" wheels

Post by vwJim » Tue Jun 27, 2017 9:57 pm

More info:

TYRES!!

To help identify the age of your tyres, each one is imprinted with a coded date which tells you when those tyres were manufactured.

The four-digit codes are usually located in a window on the tyre sidewall. The first two digits of the code represent the week of production during the year (from 1 to 52) while the second two digits represent the year of manufacture.

So for example....



1413 - Where the 14 denotes the week of manufacture and 13 represents the year i.e. 2013, meaning this tyre was made in the 14th week of 2013.

0710 - Where the 07 denotes the week of manufacture, The 10 represents the year, this shows that the date of manufacture is the 7th week of the year 2010



If your tyres are printed with only a 3-digit number, it means your tyres were manufactured before the year 2000 and should be replaced asap. If your tyres are older than 5 years old, you should consider replacing them.
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readyboy61
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Re: Tyre Pressures - 15" wheels

Post by readyboy61 » Wed Jun 28, 2017 10:10 am

As this is tech thread is a safety issue should it be put as a 'sticky' at the top?
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paultaylor12
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Re: Tyre Pressures - 15" wheels

Post by paultaylor12 » Mon Jul 10, 2017 6:54 am

don't go on the advice check bus manual book all information in it like front tyre air pressure and rear tyre air pressure.

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Re: Tyre Pressures - 15" wheels

Post by readyboy61 » Thu Aug 24, 2017 1:56 pm

paultaylor12 wrote:
Mon Jul 10, 2017 6:54 am
don't go on the advice check bus manual book all information in it like front tyre air pressure and rear tyre air pressure.
:lol: :lol: :lol: really, one size does not fit all, have you read the thread....thought so :lol: :lol:
Fixing VWs in my sleep, im not the only one right?

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vwJim
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Re: Tyre Pressures - 15" wheels

Post by vwJim » Thu Aug 24, 2017 5:41 pm

readyboy61 wrote:
Thu Aug 24, 2017 1:56 pm
paultaylor12 wrote:
Mon Jul 10, 2017 6:54 am
don't go on the advice check bus manual book all information in it like front tyre air pressure and rear tyre air pressure.
:lol: :lol: :lol: really, one size does not fit all, have you read the thread....thought so :lol: :lol:

I'd love to see the manual that lists the tyre pressures for all the various none standard tyres used...
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