kieronf
New Member
- Posts
- 223
- Location
- Holsworthy, Devon
Getting mine shod in new Grabber At's tomorrow (255/55/18/109V). Any recommendations as to pressures would be most welcome.
the air pressur is on the side of the tyre use the manufacturer recommendations . simpleGetting mine shod in new Grabber At's tomorrow (255/55/18/109V). Any recommendations as to pressures would be most welcome.
yep, but everyone here has tried and tested pressures for various tyre brands. I've been running at 28 front 36 rear, just wondered what worked best for these tyres when fitted to a P38...............
Tyre pressures are determined by the car (load weight etc.) not the brand of tyre.
on tyre - max pressure before it goes bang.
Tyres on car - chalk test at fitters suggested 28 front and 36 rear for best footprint. As an aside, the tyres they took off were all at 6psi higher than the garage air guage I regularly used had suggested.
The meter at the tyre fitters was done by trading standards ( I think it was them) only last Tuesday and so is bang on. Just goes to show these bloody garages don't calibrate their guages too often.
I have a similar problem with my own guages. I have 3 and they all show different readings - no idea which one is right if any. Anyone recommend a decent reliable guage?
Dunno if it's my imagination, but I haven't felt or heard the ABS kick in since switching to Grabber ATs, the Pirelli Scorpions were always scrabbling for grip over wet drain covers or whathaveyou. I expected the Grabbers to be inferior on tarmac but better off road - it seems to me they're better on-road as well!
Regarding tyre pressures and handbook values, the prosecutions case against a driver involved in a fatal loss of control.Hinged on the incorrect pressures found on the vehicle,compared to the vehicle handbook.
So disregard the vehicle handbook at your own risk......
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 tryersBut what do you do if the size of tyre you are using are not in the manual. Ah, got you there!
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
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?
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