What pressure should my tires have

AdrianC

Mishomeister wrote: »

The handbook refers me back to the table at the top of this post. This table has too many numbers on it so I can't figure out which one apply to my car.

What.
Size.
Tyres.
Are.
Fitted.
To.
Your.
Car?

Each tyre size has two pairs of figures - one for lightly loaded, one for heavily loaded.
Each pair of figures is front and rear, according to the diagram of the car.

If they're <say> 185/60 14, then you look that row up in the table.
2.2bar front/2.0bar rear lightly loaded, or 2.3bar front/2.7bar rear if heavily loaded.

If you really need them in PSI, then just type "<whatever> bar in psi" into google. 2.0bar is 29psi. 2.2bar is 32psi. 2.3bar is just over 33psi. 2.7bar is 39psi.

rdr

bigadaj wrote: »

Well I certainly use kPa in my engineering calculations, lot easier than pounds force per square foot.

And in a happy coincidence, much like the near equivalence between ton and tonne, then 1 bar is pretty much 100kPa.

That's because 1 bar = 100 000 Pa = 100 kPa by definition, and probably 1 bar is about 1 atmosphere by design.

almillar

The handbook refers me back to the table at the top of this post. This table has too many numbers on it so I can't figure out which one apply to my car.

I don't want to be nasty, but you shouldn't be driving if you can't work this out with our help. Answer Adrian's question above - what size is you tyre - you've already taken a photo of part of your tyre, take a photo of another part of it with the size on it. Hopefully it'll match one of the sizes listed in the table. Then you've got ONE LINE of the table to read.

Is your car:
a) 155/80 R13
b) 165/70 R14
c) 185/60 R14
d) 185/55 R15
e) 195/50 R15
f) 205/45 R16
g) other?

reeac

rdr wrote: »

That's because 1 bar = 100 000 Pa = 100 kPa by definition, and probably 1 bar is about 1 atmosphere by design.

No probably about it. One bar is one atmosphere by definition.

DoaM

1 atm is 1.01325 bar, so it is about 1 atm not exactly it.

Wiki is always right, isn't it?

Jackmydad

In the words of the Beach Boys.
"Bar Bar Bar Bar Barbara Ann"

It's all academic without the tyre size

almillar

Also in the words of the Beach Boys -

'God only knows' (without the tyre size)

Richard53

As the tyre sings "round, round, get around, I get around".

Mobeer

Richard53 wrote: »

As the tyre sings "round, round, get around, I get around".

Don't be silly - that wasn't a tyre, that was a tea bag:
https://www.youtube.com/watch?v=g1gUxFXqcG8

Mr.Generous

Just put 33psi in and have done with it.