Dunlop issue......

[RedRobin]

^^^^
Indeed my GTI did originally come with Monza 17's, and Conti's.

My VW dealer usually inflates my new tyres to 39 psi (~2.7 bar) and I have recently started doing the same.

[Teutonic_Tamer]

Phil, was it all four which went like that?    If it was just the fronts, I'd advise on pumping the fronts even higher than the 41 psi you increased them too.  When I had Dunlops on mine, I found that 46 psi up front kept the deformation at bay, and didn't affect the way they wore either.

Anyway, you have just witnessed the 'static deformation' which I previously mentioned. 

And I'm sure you know it makes sence not to use them again when they wear out! 

Thankyou shaun, glad youve Replied .

As always, you are most welcome.

It  was the rear tyres which have showed most deformation.

Oh!  Do you normally have peeps in the back, or keep tools in the boot?  If so, you should really be using the 'fully laden' pressures on the fuel flap sticker all the time.

What about the 'load index' on the tyres - maybe the rears arn't the 'eXtra Load' rating - the tyres for the 18" rims should have a load index of 92Y.

Would pressure would you say is best in the tyres? ive set them to 41psi allround currently. Tire roar is lesser aswell now ive noticed.

I think the full load pressure for the rears is 44psi.  But you just need to experiment.  Modern low profile radial tyres should never really have the characteristic 'bulges' on the sidewalls where the tyres touch the ground - and a good way to check for 'correct' pressures is to monitor carefully the depth of tread across the width of the tyres - though you really need a proper pencil-type tyre depth guage.

HTH 

[Teutonic_Tamer]

....

On the subject of tyre pressures I thought that the label on the inside of the fuel filler cap stated 2.5 bar (~36 psi) though I noticed that my VW dealer gave me 39 psi when I recently had new tyres.

Perhaps he was taking into account those big APs !! 

But seriously though, the latest advice from the actual tyre manufacturers is to actually run on the 'fully loaded' pressures at all times, even when just one person is in the car.  This is to help reduce rolling resistance, and therefore improve not only fuel economy, but also the generall 'efficiency' of getting maximum efficiency from the engine and brakes.

So wouldn't 40+ psi result in uneven tread wear?

No.  Modern quality radial tyres which use steel belting in the tread plies won't really 'baloon' from being over inflated.  Obviously, if the plies are damaged, then increasing the pressure will noticeably show up worse - but for normal 'healthy' tyres, there is absolutely no problem with over-inflation. 

But under-inflation - well that is a very different issue.   

[Teutonic_Tamer]

Even 2.5 bar seems a little low. I know the R is a little heavier than the GTI but mine states 3.2 Bar all round 

All that extra lard eh!  Must be like having John Prescott sitting in the boot! 

[Teutonic_Tamer]

My GTI came originally on Monza 17's and Continental tyres - Would this make any difference?

That sticker is exactly the same as mine - and mine was factory fit 18" Monza IIs - with Dunflops.

[Teutonic_Tamer]

Whats is that in Psi!. Bar is not whats on the forecourt pumps!

....If you examine most forecourt pumps you'll see that by pressing a button to select bar and then punching in your bar value they will then convert that to psi and display that for the duration as your 'End' limit.

The UK is supposed to be metric!!

You you ask for 568 mililitres of Wadworths 6X ?      Mine's a PINT, thanks! 

[andrewl]

havnt been on for a few weeks;
Use to have Dunlop sport maxx on my edition 30 and they are quite simply rubbish, ive got 4 Goodyear"s on now and they have totally transformed my car in every area. in the dry they just stick to the road and in the wet they are just as good. I would say i can take corners 5 mph faster than the Dunlop"s. They are an old tyre and not in the same league and should be treated as budget tyres imo.

[nick30]

....

On the subject of tyre pressures I thought that the label on the inside of the fuel filler cap stated 2.5 bar (~36 psi) though I noticed that my VW dealer gave me 39 psi when I recently had new tyres.

Perhaps he was taking into account those big APs !! 

But seriously though, the latest advice from the actual tyre manufacturers is to actually run on the 'fully loaded' pressures at all times, even when just one person is in the car.  This is to help reduce rolling resistance, and therefore improve not only fuel economy, but also the generall 'efficiency' of getting maximum efficiency from the engine and brakes.

So wouldn't 40+ psi result in uneven tread wear?

No.  Modern quality radial tyres which use steel belting in the tread plies won't really 'baloon' from being over inflated.  Obviously, if the plies are damaged, then increasing the pressure will noticeably show up worse - but for normal 'healthy' tyres, there is absolutely no problem with over-inflation. 

But under-inflation - well that is a very different issue.   

eeek *runs off to pump up tyres*

i was under the impression that its better to have them just under to increase grip etc

and phil i have pzero neros and for 10,000 miles they are still about 6mm and great grip in the wet and dry so i will be sticking with them they arent expensive really either i remember robin said he had them aswell but changed for goodyears not sure why tho michelins are good but theyre a bit expensive so got for F1's or pzero imo  

[Teutonic_Tamer]

....

On the subject of tyre pressures I thought that the label on the inside of the fuel filler cap stated 2.5 bar (~36 psi) though I noticed that my VW dealer gave me 39 psi when I recently had new tyres.

Perhaps he was taking into account those big APs !! 

But seriously though, the latest advice from the actual tyre manufacturers is to actually run on the 'fully loaded' pressures at all times, even when just one person is in the car.  This is to help reduce rolling resistance, and therefore improve not only fuel economy, but also the generall 'efficiency' of getting maximum efficiency from the engine and brakes.

So wouldn't 40+ psi result in uneven tread wear?

No.  Modern quality radial tyres which use steel belting in the tread plies won't really 'baloon' from being over inflated.  Obviously, if the plies are damaged, then increasing the pressure will noticeably show up worse - but for normal 'healthy' tyres, there is absolutely no problem with over-inflation. 

But under-inflation - well that is a very different issue.   

eeek *runs off to pump up tyres*

i was under the impression that its better to have them just under to increase grip etc

Maybe if you are crawling along at snails pace through some sand dunes!

But on the road, whatever the weather (even snow) - you should never, ever lower the pressures.  Lowering pressures will not increase grip, but it will make the car less stable, make the car use more fuel, and certainly reduce the life of your tyres.

and phil i have pzero neros and for 10,000 miles they are still about 6mm and great grip in the wet and dry so i will be sticking with them they arent expensive really either i remember robin said he had them aswell but changed for goodyears not sure why tho michelins are good but theyre a bit expensive so got for F1's or pzero imo  

Pirelli = 

Sorry, but they are aweful tyres!

[Saint Steve]

Thanx for everyones advice, i think F1's up nxt or Ps2's as they seem to be People's 1st choice's.