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Tyre Pressure advice please

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500bhp:
I have just fitted a set of 245/70/16 tyres to the Disco, any idea what the road pressure should be, also am I correct in thinking taking them down to 20 for off road. They are Yokohama Geolander M/T's ...thanks in advance

Bush Tucker Man:
I run my Colways A/T's at 26psi front & 36psi rear for all useage.
But then the ply-rating affect pressures

Range Rover Blues:

--- Quote from: "Bush Tucker Man" ---I run my Colways A/T's at 26psi front & 36psi rear for all useage.
But then the ply-rating affect pressures
--- End quote ---


That sounds a little light on the front, do they wear ok?

DiscoDan:
Hi ya.

The tyre pressure spec for 235/70 R16 from the Haynes manual is 28 front & 34 back. No mention of different pressures for differing bias, i.e. MT versus AT.

Is it correct that the tyre ply rating determines the category, MT/AT? or am I confusing Bush Tucker Mans post?  :?

Regards, Danny.

muddyweb:
MT = Mud Terrain
AT = All Terrain


As I've mentioned before, once you have a starting point I find the following a useful check.

Draw a line about 1" thick across the tyre tread with chalk and go for a short drive (maybe 1/4 mile)

You should see the chalk line wear evenly.  If it wears more in the centre, the tyre is over-inflated, if it wears at the edges, the tyre is under-inflated.

Adjust the pressure to suit, and once you are happy, measure it and make a note.

It's not incredibly precise, but it will give you some idea of the correct pressure for *your* vehicle and *your* tyres.

Manufacturers pressures only relate to a standard vehicle on factory tyres.  Once you start modifying, etc...  you will have an effect.

Hope that helps

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