Best Tyre Pressures ?

[jonathaneuk]

Hi All,

Only had My Insignia few days but not sure on what the correct tyre pressures should be.
Tyres are 245/45/18. Insignia 1.4T Sri.

The settings its on the OBC is 'Light' so not sure whats best pressures for them.

Thanks all

Jonny

[Howy]

Check n/s pillar decal or owners manual

[jonathaneuk]

Check n/s pillar decal or owners manual

Did do mate. But. It's recommending 39psi. But I'm wanting to know what you guys think is best and the setting to choose on the OBC

Jonny

[Howy]

Running my 16t on 34psi all round.

[jonathaneuk]

Running my 16t on 34psi all round.

That on 18s too?

Jonny

[Howy]

[marko301]

Running my 18" on 32psi cold I have tpms set on light. They tend to run at about 34-35 psi when warm from driving.

[jonathaneuk]

Running my 18" on 32psi cold I have tpms set on light. They tend to run at about 34-35 psi when warm from driving.

Nice. I think mine are currently set to eco as when there warm the pressures are 37/38.

Only had it few days and don't think garage have looked at them

Jonny

[Langy]

granted mine are 17's but i tend to take the size of the wheel (17) and double it..(34) then add a couple extra pounds..(36).. not sure if this helps,

[jonathaneuk]

granted mine are 17's but i tend to take the size of the wheel (17) and double it..(34) then add a couple extra pounds..(36).. not sure if this helps,

Wow...thats countdown stuff ! Hahaha

Jonny

[Chewy1971]

Did do mate. But. It's recommending 39psi. But I'm wanting to know what you guys think is best and the setting to choose on the OBC

Jonny

I'm sure you've mis-read the manual just a little. I think the 39psi will be for recommended ECO pressure setting. You're most likely 32psi front, 29psi rear. Or for heavy loads 32psi front and 39psi rear.

[jonathaneuk]

Never read manual just side of the door. Will grab a picture later mate

Jonny

I'm sure you've mis-read the manual just a little. I think the 39psi will be for recommended ECO pressure setting. You're most likely 32psi front, 29psi rear. Or for heavy loads 32psi front and 39psi rear.

[Plym Ian]

Run my 18’s on 39 front and 42 rear that’s the eco pressures but sometimes find them quite hard

[Chewy1971]

I run mine slightly higher at 35psi - 19". It's all horses for courses, but anywhere in between the manual figures should be fine.

[2000rpm]

1.4T, all rim/tyre combinations:
Comfort: 32PSI front, 34PSI rear.
Economy: 39PSI front, 42PSI rear.
Full load: 32PSI front, 42PSI rear.

Personally I'd set at about 35PSI front and 37PSI rear. In winter it'll drop a couple of PSI and in summer it'll increase by a couple of PSI due to weather conditions (temperature) so being in the middle of the range allows a bit of temperature-related variation.

Note that each engine variant has different recommended pressures; mine recommends 39PSI in the front regardless of comfort/eco/full load, with rear varying from 35-46PSI according to comfort and load being carried. Mine's usually set at 39PSI front and 37PSI rear.