Hopefully I should be collecting my MY11 Superb combi on Saturday, I am seriously thinking about taking my winter wheels and tyres with me and changing them straight away (as it seems silly to have them sitting around here if it is going to be icy or snowing).

However i am aware that the tyre pressures are only on the fuel filler flap and not in the manual, so can someone please tell me what the revised pressures are (after the elk test's) for the 225/40/18 and more importantly the 205/55/16 (as fitted to the 2.0 TDi CR140 in the S trim level or even a greenline's pressures)

I am aware that I need to increase the winter tyres by 0.2BAR, but from what??

(FWIW mine is a BW43, 2.0 TDi CR170 manual Elegance)

Edited 29 November, 201015 yr by Gizmo68

It is normal load 2.2 bar front and rear.

Fully loaded with passengers and luggage 2.6 bar front 3.1 bar rear.

Hope this helps, Phil.

It would appear that the Elk test was only specific to that particular countries fitted tyres and was performed on a fully laden car (that's my conclusion), so I don't think it applies to us in the UK.

I have settled for 2.4 Bar front & rear for normal load conditions, that's 35 psi to us. I tried higher amounts but it made the ride jiggly, I've gone a bit higher than the Skoda figures, simply because of previous experience with these tyres sizes.

If your unsure stick to the figures on the fuel flap, it is the "offical" figures after all.

Edited 30 November, 201015 yr by Tankdave

please tell me what the revised pressures are (after the elk test's)

The revised pressures are exactly the same for a normal loaded car.

If, however, you have a high load AND 18" (which I presume you only use in the summer-time) you should add 0,2bars extra to the back tires and 0,3bars extra to the front tires. (that would be 0,2 and 0,3 MORE than what it says on the fuel-cap for a loaded car.)

Note again that this is only if you have a fully loaded car.

It would appear that the Elk test was only specific to that particular countries fitted tyres and was performed on a fully laden car (that's my conclusion), so I don't think it applies to us in the UK.

You are correct that the car failed with swedish fitted tyres, however the safety margins were too low.

The tyres used had a load-index of 92 (which means 630kg). add that up for the 2 tyres at the back and you have a max-load of 1260kg.

Now.. the max axel-load for the back is 1250kg. (of course it can withstand more, but yet, it leaves only 10kg from max axel to max tyre weight..

When they later on weighed the car, they noticed that they'd loaded it with 60kg too much according to the max-load (no problem for the axel, but then again the main reason why the tyres wrenched off)

What skoda SHOULD do tho, is raise the max-axel weight with 11kg (to 1261kg). then you'd have to use reinforced tyres with a load-index of 95 instead, and you'd be dead safe even if you accidently overloaded your car.

Edited 30 November, 201015 yr by wamp

Thanks to everyone who has replied, so the preassures do not alter between a 225/40/18 and a 205/55/16, with both being 2.2bar?

Correct, the car needs the same pressure, regardless of the volume of air used to inflate the tyre to the given pressure (for the same given payload).

It would appear that the Elk test was only specific to that particular countries fitted tyres and was performed on a fully laden car (that's my conclusion), so I don't think it applies to us in the UK.

I have settled for 2.4 Bar front & rear for normal load conditions, that's 35 psi to us. I tried higher amounts but it made the ride jiggly, I've gone a bit higher than the Skoda figures, simply because of previous experience with these tyres sizes.

If your unsure stick to the figures on the fuel flap, it is the "offical" figures after all.

Hi!

As I understood it, one of the main reason for the failure was that Skoda didn't have their numbers right regarding the weight of the car. All the extras pushed the estimated weight over into the wrong side and the recommended tire pressure wasn't enough to keep the 18 inch tire on in that maneuver. All other sizes went trough. Winter roads will probably not give any tire this kind of grip though. I will most likely stick to what I have for my present Mondeo, 2.5 all around on my 16 inch wheels.

/Suberbjoser

Thanks to everyone who has replied, so the preassures do not alter between a 225/40/18 and a 205/55/16, with both being 2.2bar?

Correct, the car needs the same pressure, regardless of the volume of air used to inflate the tyre to the given pressure (for the same given payload).

OK as a definite answer on this one it appears that the tyre size DOES make a difference to the tyre pressures.

This is taken from my fuel flap on my MY11 (BW43) Superb Combi 2.0 TDI CR 170 Elegance.

For a 'normal' load'

205/55/16 = 2.4 bar (increased by 0.2 bar to 2.6 bar for WINTER tyres - as recommended by Skoda and the tyre manufacturers)

225/40/18 = 2.2 bar (std fit tyres)

HTH