Tyre Pressure Confusion

[KXL]

Just for comparison got an A3 1.0 MHEV running 225/45/R17, weight listed as 1280kg, recommended tyre pressure for all 4 tyres on '3 passengers 1 luggage' is 36psi all around,

 

[SuperV8]

Just for comparison got an A3 1.0 MHEV running 225/45/R17, weight listed as 1280kg, recommended tyre pressure for all 4 tyres on '3 passengers 1 luggage' is 36psi all around,

Interesting, presuming that's 'eco' - not 'comfort'?
You have the same tyres as mine and your 100 +kg lighter - and my recommended pressures are 3psi lower

 

[Cwalker1975]

Hi I’m new on here! I recently brought my seat Leon fr 1.8 tsi 2015 3 door! Very happy with it! It came with the tyres pressures at 39 all round! Which surprised me when I checked the tyre pressure! I lowered this down to 33 all round! Cars been great with just front passengers in the car! Today we went out for the day 2 adults and kids. The car felt really heavy in the back! So went to the garage and pumped them up to 39 again! Cue the really bad road noise! The car still felt really heavy the back! Seat label says 38 41 when pressure laden! Has anyone found a good pressure to cater for weight in the back?

 

[Koulou]

Just for comparison got an A3 1.0 MHEV running 225/45/R17, weight listed as 1280kg, recommended tyre pressure for all 4 tyres on '3 passengers 1 luggage' is 36psi all around,

I guess that the A3 has softer suspension, which should make the 36psi all around feel better than on a Leon FR.

Sent from my LYA-L29 using Tapatalk

 

[BradleyH]

So I figured I'd check my tyre pressures today whilst on dinner at work, so naturally I checked the tyre pressure sticker on the passenger door, I will give the spec of the car for context, 2019 Seat Leon ST Xcellence Lux 2.0TSI DSG 190ps, this car comes with 225/45/17 tyres as standard, first of all I always thought low load and regular driving being set at 2.9 bar on the front and 2.7 bar on the back was always a little bit over the top and quite a lot higher than I expected, so I typically stuck with the 2.6 front and 2.4 back recommendation, I figured I'd try the 2.9 out to see if I preferred it or not, but then I noticed something my tyre size isn't actually listed here and from memory it doesn't list tyre pressures in the owners manual it simply say how to check and fill the tyre and to consult the sticker, but again the tyre isn't listed here which I find peculiar, so before I drive home and ruin a perfectly good set of tyres or kill them outright, are we in agreement that 2.9 bar and 2.7 bar is pretty high especially for 17" wheels?
-edit I think I've answered my own question, the tyre pressures stated below are for a spare wheel? am I correct? if so again 2.9 bar seems high to me.

 

[SRGTD]

So I figured I'd check my tyre pressures today whilst on dinner at work, so naturally I checked the tyre pressure sticker on the passenger door, I will give the spec of the car for context, 2019 Seat Leon ST Xcellence Lux 2.0TSI DSG 190ps, this car comes with 225/45/17 tyres as standard, first of all I always thought low load and regular driving being set at 2.9 bar on the front and 2.7 bar on the back was always a little bit over the top and quite a lot higher than I expected, so I typically stuck with the 2.6 front and 2.4 back recommendation, I figured I'd try the 2.9 out to see if I preferred it or not, but then I noticed something my tyre size isn't actually listed here and from memory it doesn't list tyre pressures in the owners manual it simply say how to check and fill the tyre and to consult the sticker, but again the tyre isn't listed here which I find peculiar, so before I drive home and ruin a perfectly good set of tyres or kill them outright, are we in agreement that 2.9 bar and 2.7 bar is pretty high especially for 17" wheels? View attachment 52778

The seemingly high 2.9 front / 2.7 rear tyre pressures is to reduce rolling resistance so max mpg / min CO2 emissions can be achieved and I dare say that’s what Seat will have used for official mpg / emissions testing.

2.6 front and 2.4 rear will be the ‘comfort’ tyre pressure setting for up to three passengers and their luggage - the middle of the three sets of figures on your tyre pressure sticker. The ‘i’ alongside the settings indicates there’s additional information - or there should be - in the owner’s manual. Setting pressures at 2.6 / 2.4 as opposed to 2.9 / 2.7 shouldn’t be an issue (they’re published manufacturer’s figures after all) but will probably result in a small increase in fuel consumption and emissions.

 

[SuperV8]

So I figured I'd check my tyre pressures today whilst on dinner at work, so naturally I checked the tyre pressure sticker on the passenger door, I will give the spec of the car for context, 2019 Seat Leon ST Xcellence Lux 2.0TSI DSG 190ps, this car comes with 225/45/17 tyres as standard, first of all I always thought low load and regular driving being set at 2.9 bar on the front and 2.7 bar on the back was always a little bit over the top and quite a lot higher than I expected, so I typically stuck with the 2.6 front and 2.4 back recommendation, I figured I'd try the 2.9 out to see if I preferred it or not, but then I noticed something my tyre size isn't actually listed here and from memory it doesn't list tyre pressures in the owners manual it simply say how to check and fill the tyre and to consult the sticker, but again the tyre isn't listed here which I find peculiar, so before I drive home and ruin a perfectly good set of tyres or kill them outright, are we in agreement that 2.9 bar and 2.7 bar is pretty high especially for 17" wheels?
-edit I think I've answered my own question, the tyre pressures stated below are for a spare wheel? am I correct? if so again 2.9 bar seems high to me. View attachment 52778

No - your spare is 4.2bar!

2.9/2.7 is your eco setting, and 2.6/2.4 'normal'
Older cars had a 'comfort' setting more like 2.2!

 

[BradleyH]

No - your spare is 4.2bar!

2.9/2.7 is your eco setting, and 2.6/2.4 'normal'
Older cars had a 'comfort' setting more like 2.2!

I mistyped mate, I meant to say "-edit I think I've answered my own question, the tyre sizes stated below are for a spare wheel? am I correct? if so again 2.9 bar seems high to me"
Yeah I saw the 2.2 bar in google images and thought wow!
Just surprising how much difference is in this model.
I typically use 2.6/2.4 which you are correct states comfort setting in my manual, but I figured I'd give 2.9/2.7 a go since I've had it remapped just to see if there is much difference.

 

[SuperV8]

I mistyped mate, I meant to say "-edit I think I've answered my own question, the tyre sizes stated below are for a spare wheel? am I correct? if so again 2.9 bar seems high to me"
Yeah I saw the 2.2 bar in google images and thought wow!
Just surprising how much difference is in this model.
I typically use 2.6/2.4 which you are correct states comfort setting in my manual, but I figured I'd give 2.9/2.7 a go since I've had it remapped just to see if there is much difference.

Aha ok.
FYI i'm on the same size tyres (225 45 17) My 2.0TDI 2014 ST has 2.3 for normal and 2.8 for fully loaded. I run it at normal-2.3 90% of the time and my tyre wear is even.
I'm sure the eco tyre setting on the newer cars are so they can eek out 0.05% lower emissions homologation. 0.05 x '1 million' is useful from a company point of view but for a single driver In the real world is negligible and speed/traffic/weather has a much bigger MPG effect.

 

[Glosphil]

With my 2018 Leon I found that the recommended tyre pressures resulted in tyres wearing more in the centre. Dropping the pressures to 33/31 gave even tyre wear. Usually only 1 or 2 persons in car. For longer journeys with 4 persons or 2 plus lots of luggage I up to 34/34.