Any one else got a swift, and a handbook for it ?, I have a 2004 swift charisma and in the hand book for it (it is the genuine hand book that came with the van when new) under tyre pressure it says...................see the hand book .
My 1992 Swift Challenger has 42psi per tyre, when we recently had it serviced by a mobile engineer he put the tyres down to 30 despite my other half showing him the handbook saying 42psi, he said the tyres were dangerously over inflated, anyway when I towed next the van felt very unstable behind me so much so the van began wag at the back end, when I got in touch with Swift they said the tyres must be put back to 42psi immediately, just goes to show that tyre pressure can make a huge difference to the safety and stability of the van when towing.
Hi Cariad, I dont have a accurate tyre pressure for you but my last van had a max weight of 1000kg and the tyre pressures were 38psi so I would aim for 35-38psi and you wont be far wrong my present van Swift 17/3 has 62 psi so it does vary from Manufacturer to manufacturer,hope this helps. Try Avondale themselves they may have a copy of the handbook for your Wren.
------------- Cheers Jim.I Reserve The Right To Be Wrong.
Quote: Originally posted by tartan-tearaway on 20/7/2008
Any one else got a swift, and a handbook for it ?, I have a 2004 swift charisma and in the hand book for it (it is the genuine hand book that came with the van when new) under tyre pressure it says...................see the hand book .
Ask customer services at Swift the lady who deales with the inquery is Kerry
she is very helpfull as Swift want to keep your business she supplied me with a
photocopy of the hand book free of charge, the very last page of the hand book has all the vital statistics of your van. hope this helps you.
crm at swiftleisure.co.uk this computer is driving me crackers
------------- Cheers Jim.I Reserve The Right To Be Wrong.
Quote: Originally posted by The 2 Tops on 19/7/2008
OK, Gary. Assuming that it can be accepted that the van must have the same ride/flexibility characteristics for stability, atc, then the difference in pressure for Matador Reinforced tyres must surely be due to differences in the flexibility of their tyre wall.
However, I suppose I am taking a too simplistic view, and there is more to it than that.
Bertie.
About as simplistic as I thought this tyre lark was but the more to delve into it the more complicated it gets?!
As for what your thinking then no, a certain size tyre must always remains the same dimensions outside, if it's of heavier, (thicker) construction then the inside dimensions reduce not the tyre get bigger outside.
I'm still learning on this but pressure is a consequence of the volume of air required inside the tyre to support the load, the actual volume of air required for a given load is a constant regardless of the size of tyre.
So the smaller the tyre or the thicker the carcase the more pressure required to force the air into the smaller space and visa versa.
Two simple examples are a giant earth mover tyre taking many tons of load at only 60psi
Now a push bike tyre carrying just you, this needs the same 60psi pressure or more!!
The difference is the available volume of space inside the tyre relative to the volume of air required to be squeezed in.
So you can see Matadors tyres would need to have thicker therefore stiffer side walls to require more pressure so your theory goes out the window!!
The actual reason in this case is possibly to do with 42psi for reinforced tyres being an 'industry standard' pressure rather than an 'absolute' maximum.
You can read more on why I say this under 'North American pressure and load markings'Here last two paragraphs
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Topic: Tyre Pressure
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