Manufacturer pressures vs tire company pressure (vredestein)
Discussion
Hi all,
I've recently had 4 new tires put on, and I am noticing quite a lot of rear roll. Aside from planning getting the geo checked, I looked to see if the tire company recommended pressures were different and perhaps that was adding to/causing the problem.
I did, and for my car (mk3 MR2) and my model of tire (sportrac 5), the pressures suggested were up from the handbook 32 at the rear, to 37 2.6bar , and fronts up from 26 to 33 2.3 bar.
That seemed a rather high jump to me, especially at the front with a 7psi gain on the handbook.
Ive changed the rear psi from the standard 32 to 35, and there is a difference - reduced roll - good times. But I am tentative about going to the full Vredestein recommended pressures all round as they seem high and I am weary of over inflation.
Dose anyone have any advice, as Ive always stuck to standard psi on my old tires and never really did any experimenting with pressures!
Thanks
I've recently had 4 new tires put on, and I am noticing quite a lot of rear roll. Aside from planning getting the geo checked, I looked to see if the tire company recommended pressures were different and perhaps that was adding to/causing the problem.
I did, and for my car (mk3 MR2) and my model of tire (sportrac 5), the pressures suggested were up from the handbook 32 at the rear, to 37 2.6bar , and fronts up from 26 to 33 2.3 bar.
That seemed a rather high jump to me, especially at the front with a 7psi gain on the handbook.
Ive changed the rear psi from the standard 32 to 35, and there is a difference - reduced roll - good times. But I am tentative about going to the full Vredestein recommended pressures all round as they seem high and I am weary of over inflation.
Dose anyone have any advice, as Ive always stuck to standard psi on my old tires and never really did any experimenting with pressures!
Thanks
Out of curiosity I looked mine up on the Continental website.
Porsche say 2.0 Front, 2.5 Rear
Continental say 2.5 Front, 3.0 Rear.
Very large difference there. Anyone want to clue me in?
Link I used was http://www.continental-tyres.co.uk/www/download/ty...
Porsche say 2.0 Front, 2.5 Rear
Continental say 2.5 Front, 3.0 Rear.
Very large difference there. Anyone want to clue me in?
Link I used was http://www.continental-tyres.co.uk/www/download/ty...
You inflate according to what the car manufacturer states, because the pressure needs to take into consideration the load (weight of the particular car) on the tyre. I think that tyre manu's figures are just ass covering figures in case some numpty underinflates and the tyre fails or even comes off the rim. I see no other use for them.
Fantuzzi said:
Hi all,
I've recently had 4 new tires put on, and I am noticing quite a lot of rear roll. Aside from planning getting the geo checked, I looked to see if the tire company recommended pressures were different and perhaps that was adding to/causing the problem.
I did, and for my car (mk3 MR2) and my model of tire (sportrac 5), the pressures suggested were up from the handbook 32 at the rear, to 37 2.6bar , and fronts up from 26 to 33 2.3 bar.
That seemed a rather high jump to me, especially at the front with a 7psi gain on the handbook.
Ive changed the rear psi from the standard 32 to 35, and there is a difference - reduced roll - good times. But I am tentative about going to the full Vredestein recommended pressures all round as they seem high and I am weary of over inflation.
Dose anyone have any advice, as Ive always stuck to standard psi on my old tires and never really did any experimenting with pressures!
Thanks
I'd stick with the OEM pressures. Tire compounds vary, but as long as the tires have the proper specs as specified by the OEM (for street use), the label on the car is usually your best bet. Most of the charts from the tire companies seem to specify pressures near the "full load" OEM pressures, when "half load" is usually what you want for normal driving.I've recently had 4 new tires put on, and I am noticing quite a lot of rear roll. Aside from planning getting the geo checked, I looked to see if the tire company recommended pressures were different and perhaps that was adding to/causing the problem.
I did, and for my car (mk3 MR2) and my model of tire (sportrac 5), the pressures suggested were up from the handbook 32 at the rear, to 37 2.6bar , and fronts up from 26 to 33 2.3 bar.
That seemed a rather high jump to me, especially at the front with a 7psi gain on the handbook.
Ive changed the rear psi from the standard 32 to 35, and there is a difference - reduced roll - good times. But I am tentative about going to the full Vredestein recommended pressures all round as they seem high and I am weary of over inflation.
Dose anyone have any advice, as Ive always stuck to standard psi on my old tires and never really did any experimenting with pressures!
Thanks
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