Tyre pressure. Car manufacturer or tyre manufacturer?

Matt82

Matt82

Matt82

Soldato
Joined
13 Mar 2004
Posts
16,649
Put air in the tyres today as they were new recently and bound to be completely wrong.

I went on the tyre manufacturer website and their recommendation for that size on that car is as follows

F 2.5 BAR / R 2.9 BAR

VW recommends

F 2.1 BAR / R 1.9 BAR

Very very different.

is there any possible way the tyre manufacture knows better?
 
On the mk3 Golf i ran miles out of spec for years, but today the other half was taking the car 220 miles up north in heavy rain and strong winds. I personally would have sucked it and seen (as it were) but i defaulted the car back to a previously known safe setting of 2.2 BAR front and rear which is super docile.

Id expect the car to be pretty fidgety with nearly 50% more air in there
 
Matt82 said:
Put air in the tyres today as they were new recently and bound to be completely wrong.

I went on the tyre manufacturer website and their recommendation for that size on that car is as follows

F 2.5 BAR / R 2.9 BAR

VW recommends

F 2.1 BAR / R 1.9 BAR

Very very different.

is there any possible way the tyre manufacture knows better?
Click to expand...

Different cars weigh different, also some have heavier front ends, so tge manufacturer guidelines should be considered, also pressure should technically be adjusted between fully loaded or just a driver.

I don't compute bar though, what's the difference in psi? Also check that the tyre manufacturer is quoting maximum pressure, which might be the case.

There's always some leeway, if you do a lot of motorway milees peo often put a few extra psi in.
 
The tyre pressures that are specified in your car's handbooks or on the door sills are based on the weight of the car and how that weight is distributed differently from front to back, that's why I'd go with them rather than the tyre manufacturer.
 
mattyfez said:
Different cars weigh different, also some have heavier front ends, so tge manufacturer guidelines should be considered, also pressure should technically be adjusted between fully loaded or just a driver.

I don't compute bar though, what's the difference in psi? Also check that the tyre manufacturer is quoting maximum pressure, which might be the case.

There's always some leeway, if you do a lot of motorway milees peo often put a few extra psi in.
Click to expand...

I don't know about all but I just checked continental's site and they have specs for a vast majority of car makes/models so not just quoting this tyre should be this all the time
 
Matt82 said:
OEM
F 30.4 PSI / R 27.5 PSI

Vredestein

F I / R 42 PSi

huuuuge difference
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Weird.. Front engined cars usually have slightly higher at the front due to the engine weight maybe someone knows better .. But id go with the manufacturer as the Vredestein pressure seems alittle high unless they are very low profile.

What car/tyre size? 42 in the rear seems high..
 
Last edited:
mk4 Golf, 1.8t (so not a boat anchor out the front)

205/55/16

Bet youd really notice the ride change over small bumps too
 
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