Pirelli 2013

[joeyg02]

The tyre that blew on Hamilton was not flipped

http://i3.photobucket.com/albums/y62/So ... 44525e.jpg

What they mean by "flipped" isn't the left tire put on the right side. They mean when the tire is mounted on the rim the outer edge was placed on the inside, and the inside on the outer edge. They claim the tires are designed so that each side of the tire is designed to bear a different type of load and that with the tire "flipped" (the inside being on the outside of the tire) the softer edge was bearing the brunt of the force while cornering, thus wearing it down significantly faster than intended. Again, this is what I read in the article on the front page that quoted Pirelli. Whether or not Pirelli is being truthful, I have no idea.

[tpe]

Can someone post a close-up picture from the start, just to check if tyres are on the correct side of the car?

[aral]

This is not a tyre thread (pun not intended)......... but when a rh wheel is put on the lh side, the inner wall will still be the inner wall. The teams do not fit the tyres, so Pirelli will always put the outer edge to the outside. However, the direction of rotation will change, and as the tyres are manufactured to cope with rotation in a specific way, putting one on the other side will put additional stress on the tyre. The bias of the belt is what dictates the direction of rotation and if the tyre is rotating against the bias, it will suffer from increased heat.

Now, can we get back to Ferrari F138.

[joeyg02]

This is not a tyre thread (pun not intended)......... but when a rh wheel is put on the lh side, the inner wall will still be the inner wall. The teams do not fit the tyres, so Pirelli will always put the outer edge to the outside. However, the direction of rotation will change, and as the tyres are manufactured to cope with rotation in a specific way, putting one on the other side will put additional stress on the tyre. The bias of the belt is what dictates the direction of rotation and if the tyre is rotating against the bias, it will suffer from increased heat.

Now, can we get back to Ferrari F138.

All I was stating was what I read in the article on the front page. I fully agree with you, we need to get back on topic.

[Huntresa]

Can someone post a close-up picture from the start, just to check if tyres are on the correct side of the car?

[SectorOne]

This thread is so huge now that finding things will be tough but according to AMUS, Brawn stated that swapping tires was nothing new, been done since pre-season testing and even in the Bridgestone-era.

That i had no idea of. Apparently Bridgestone did not like it but Pirelli do not care to much.
It´s AMUS so maybe a pinch of salt if that conversation even happened.

http://www.auto-motor-und-sport.de/form ... 36233.html

[amc]

Can someone post a close-up picture from the start, just to check if tyres are on the correct side of the car?

I can't find anything giving a good picture of the rear tyres, but there's a goldmine on the fronts.

In parc ferme after quali, Hamilton has the the front tyres the right way round - if you zoom in you can see the 'L' on the outside of his left front.
http://www.formula1.com/wi/gi/Lm-S/sutt ... 9ju706.jpg

In the race, this photo (and others) show the tyres have remained on the same side from quali - the arrow for rotation is pointing the same direction. So the front tyres are the correct way round, at least for the first stint in the race. The rears have also remained the same way round between quali and the race, but it's tricky to say which way round they are.
http://www.hirado.hu/Formula1/Hirek/201 ... 1.jpg.ashx

However, on the way to the grid (on an old set of tyres - note the 'R6' instead of 'L2' written on them), he has the tyres the wrong way round (see the 'L' on the right). Interestingly, these tyres have the 'official' left marked as the 'Mercedes' right, whereas the quali tyres were matched correctly, having the 'official' left as the 'Mercedes' left.
http://www.formula1.com/wi/enlarge/0x0/ ... br1115.jpg
http://www.formula1.com/wi/enlarge/0x0/ ... br1051.jpg

And in practice, on the hard compounds, Rosberg had the front tyres swapped:
http://www.formula1.com/wi/enlarge/0x0/ ... 9ju519.jpg

Huntresa's post also shows the hard compound tyres being swapped at the front. It would seem then that the 'default' position is to have the tyres swapped, but for peak grip and speed - e.g. qualifying - they aren't. In turn, we can conclude that greater speed is found with the front tyres the right way round, but greater endurance if they are swapped.

[Huntresa]

This thread is so huge now that finding things will be tough but according to AMUS, Brawn stated that swapping tires was nothing new, been done since pre-season testing and even in the Bridgestone-era.

That i had no idea of. Apparently Bridgestone did not like it but Pirelli do not care to much.
It´s AMUS so maybe a pinch of salt if that conversation even happened.

http://www.auto-motor-und-sport.de/form ... 36233.html

Listening to some old drivers and experts this is done in many race series, both on other cars and way down in lower series.

[SectorOne]

Could there be a link between failures and swapped tires? (or un-swapped tires)

[Huntresa]

Could there be a link between failures and swapped tires? (or un-swapped tires)

Well it didnt help but Pirelli knew, we knew and everyone else knew. Pirelli should have atleast issued a statement so they could not be liable if teams used them in this way, like they did with camber levels at Spa.

[stefan_]

One of the Ferraris had swapped tires on the grid. I presume they use this method for both cars.



Alonso finished the race with swapped tires on the front (and I suppose on the back too).

[Sombrero]

2013 Pirelli invents the "sick" tire without even testing...

[Jersey Tom]

[raymondu999]

This is not a tyre thread (pun not intended)......... but when a rh wheel is put on the lh side, the inner wall will still be the inner wall.

Remember, the 2013 tyres have some ply-steer built in

[Cam]

The biggest issue Pirelli has is that it simply will never admit it's tyres are unsafe. That would kill their business. Answer: blame everyone else. So they're stuck in this situation now where the FIA and teams now unanimously agree to facilitate testing to solve the safety issues - while Pirelli still maintain there's no safety issue to solve. Regardless of how this pans out, Pirelli's word can never really be trusted again. What a mess.