Air pressure for Grabbers

StuckAgainSteve · Dec 22, 2011

Fur Trapper said:
Fook the manual The air pressure is on the side of the tryer from manufacture, that is what you HAVE to use. The book is old compared to what the tryer design is, with different rubber compounds and different ply/belting material that is why the manfacture has to put the psi specs on there tryers

I'm sure you have your areas of expertise but please do not spread potentially dangerous misinformation like this posted above, the correct pressure for a tyre is based entirely on the air pressure required to maintain the correct footprint - which is predominantly determined by corner weight of the vehicle - this has nothing to do with the MAXIMUM pressures stamped on the tyrewall. Unless we are talking different tyre construction completely, runflat or crossply, whatever, the construction of the tyre from manufacturer to manufacturer is negligible when it comes to determining tyre pressures.

Of course the handbook pressures are biased upwards slightly to handle the peak weight loads the vehicle could be expected to carry.

If you are running stated maximum pressures in your tyres you will have halved or even quartered the tyre footprint available depending on the vehicle and tyre combination.

lazydog · Dec 22, 2011

so are we saying I cant run my tyres at 900psi then

:doh:

Fur Trapper · Dec 22, 2011

StuckAgainSteve said:
I'm sure you have your areas of expertise but please do not spread potentially dangerous misinformation like this posted above, the correct pressure for a tyre is based entirely on the air pressure required to maintain the correct footprint - which is predominantly determined by corner weight of the vehicle - this has nothing to do with the MAXIMUM pressures stamped on the tyrewall. Unless we are talking different tyre construction completely, runflat or crossply, whatever, the construction of the tyre from manufacturer to manufacturer is negligible when it comes to determining tyre pressures.

Of course the handbook pressures are biased upwards slightly to handle the peak weight loads the vehicle could be expected to carry.

If you are running stated maximum pressures in your tyres you will have halved or even quartered the tyre footprint available depending on the vehicle and tyre combination.

So what is dangerous about following the manufacture recommendations on tyre pressure??????????? Nob head
you have to keep the tyres pressure with in the manufacturer recommendations, which is molded into the tryer not the fookin owners manual, 99% chance the factory installed tryers are not on the vehicle any more. People usually upgrade to a better tryer when the replace them so will void the owners manual air pressure guide.So Feck off

lazydog · Dec 22, 2011

FT on tyres in the usa of a it might be different but over here the presure on the side of the tyre is max pressure.

goonarmy · Dec 22, 2011

Fur Trapper said:
So what is dangerous about following the manufacture recommendations on tyre pressure??????????? Nob head
you have to keep the tyres pressure with in the manufacturer recommendations, which is molded into the tryer not the fookin owners manual, 99% chance the factory installed tryers are not on the vehicle any more. People usually upgrade to a better tryer when the replace them so will void the owners manual air pressure guide.So Feck off

running at the limit is dangerous for the tires, handling and braking.:doh:All of these make for an interesting commute.

Fur Trapper · Dec 22, 2011

James R said:
But I thought someone earlier in the thread said that the pressures shown on the tyres are the maximum pressures not the recommended pressures? How would the manufacturer know which tyre would be used at the front or rear of a car where sometimes the pressures are different?

On the tyre is a label box with the minimum and maximum psi for a tyre work with in those specs and all will be good. go outside those recommendations and you will have tyre wear and handling issues.
Now I used to drive Hgv here in the states and had 18 tyres to check every 8 hrs for psi. I have over i million accident free miles and few tyre failures due to improper air psi.

I am getting about 75-80 thousand miles on cooper atr with tyrer rotation every 6 thousand miles and weekly air psi checks. How many miles you get from your tyres? That is done by following the manufacture recommendations and adjust psi according to the load carrying conditions loaded/unloaded Psi varies between 60-80psi

kooky_guy · Dec 22, 2011

Fur Trapper said:
On the tyre is a label box with the minimum and maximum psi for a tyre work with in those specs and all will be good. go outside those recommendations and you will have tyre wear and handling issues.
Now I used to drive Hgv here in the states and had 18 tyres to check every 8 hrs for psi. I have over i million accident free miles and few tyre failures due to improper air psi.

I am getting about 75-80 thousand miles on cooper atr with tyrer rotation every 6 thousand miles and weekly air psi checks. How many miles you get from your tyres? That is done by following the manufacture recommendations and adjust psi according to the load carrying conditions loaded/unloaded Psi varies between 60-80psi

Not on a bleeding Rangie, it doesn't. 28 front 38 rear are the specified pressures. Try driving on the pressures you suggest and you'll be off the road and in a ditch in no time.

goonarmy · Dec 22, 2011

variations of 60 - 80 psi? on a tire that runs at 30 ish? Even on yer wagon that'll run at 110ish psi a variation of 60 means you have pressures of between 80 and 140 psi?Really?

Fur Trapper · Dec 22, 2011

goonarmy said:
variations of 60 - 80 psi? on a tire that runs at 30 ish? Even on yer wagon that'll run at 110ish psi a variation of 60 means you have pressures of between 80 and 140 psi?Really?

No.......... The minimum is 60 the max is 80psi Copper 285-70-18 load range E

goonarmy · Dec 22, 2011

Fur Trapper said:
No.......... The minimum is 60 the max is 80psi Copper 285-70-18 load range E

so your saying a grabber should be run between 60 and 80 psi?

Fur Trapper · Dec 22, 2011

goonarmy said:
so your saying a grabber should be run between 60 and 80 psi?

what is the load range?? are they lt or a p tyre

goonarmy · Dec 22, 2011

**** knows. but they defo shouldnt be run at 60-80 psi!

Fur Trapper · Dec 22, 2011

goonarmy said:
**** knows. but they defo shouldnt be run at 60-80 psi!

If they are load range E then yes. But doubt anyone would put them on a land rover

Do you know what load range E is for????????????

kieronf · Dec 22, 2011

In the US of A it is a legal requirement that tyre manufacturers specify on the tyre wall the safe minimum and maximum operating pressures within the load capacity of the tyre.

We don't have that here in the UK, instead the EU requires that the absolute maximum inflation pressure (before the tyre destructs) is shown for safety guidance.

Hope this helps sort some of the confusion.

goonarmy · Dec 22, 2011

Fur Trapper said:
If they are load range E then yes. But doubt anyone would put them on a land rover

Do you know what load range E is for????????????

nope and i care not seeing as its a american system.:doh:

Fur Trapper · Dec 22, 2011

goonarmy said:
nope and i care not seeing as its a american system.:doh:

same rating as yours

goonarmy · Dec 22, 2011

Fur Trapper said:
same rating as yours

trigger, i refer you to post 34.

Fur Trapper · Dec 22, 2011

goonarmy said:
trigger, i refer you to post 34.

looked at this and they are similar you call them different names. But what I use are what you call extra load.

Tyre sidewall marking guide. Size, speed ratings and load index for tyres from North Staffs Tyre & Battery

goonarmy · Dec 22, 2011

similar and same......do you know how use a dictionary trig?
Dave.

lowfat · Dec 22, 2011

What you have to remember is that in the nanny state of Europe you are not allowed to think..... If the those glorious MEP.s of our,s have there way you will fit what tire the car designer says and that would be final....
My Norwegian car had the tire and wheel sizes specified on the insurance certificate.

The car has passed conformity test within Europe which include what size tires and pressures at what loads and speeds.

You CAN fit Carlos Fandango wheels and tires and run them at whatever pressure you like....
BUT be involved in a fatal accident and not comply with the car Manufacturers specs and you are liable...

Just because somebody sells you something doesn't mean its legal to fit it in this "where there's blame, theres a claim"culture we live today.

Just my take.....and I run General grabbers on mine at the manual pressures.

Air pressure for Grabbers

Well-Known Member

Well-Known Member

Banned

Well-Known Member

Beer tester

Banned

Well-Known Member

Beer tester

Banned

Beer tester

Banned

Beer tester

Banned

New Member

Beer tester

Banned

Beer tester

Banned

Beer tester

Active Member

Similar threads