Pirelli P Zero Asimmetrico question

They can be swapped from side to side on the car - the same outer edge will obviously still be on the outer side.

MPSS have the same these days, no longer dictated by rotational direction.

How is this possible? Ya got me there!

 

The P Zero Corsa Asimmetrico tread design features a semi-slick, low void ratio and a large external shoulder structure with a minimum number of grooves to eliminate the blocky structure of a conventional pattern. The P Zero Corsa System Asimmetrico asymmetric and directional tread design requires separate left and right side tires for the vehicle as branded on each tire's sidewall. The tire’s internal structure includes highly flexible steel belts reinforced by spirally wound nylon to enhance cornering stability and provide high-speed capability while reducing weight.

 

TireRack:- http://www.tirerack.com/tires/tires.jsp?tireMake=Pirelli&tireModel=P+Zero+System


The P Zero System is Pirelli's Max Performance Summer tire system offering the possibility of selecting from two different tire designs tuned to be used separately or in unison depending on the type of car, driving conditions and driving style. Designed to heighten performance in the dry and especially in the wet, P Zero System tires were originally developed for some of the world's fastest cars, such as Lamborghini, Ferrari, and Porsche. Like all summer tires, P Zero System tires are not intended to be driven in near-freezing temperatures, through snow or on ice.

The P Zero System's two different options include the P Zero Asimmetrico and P Zero Direzionale. P Zero Asimmetrico all-position or rear-axle tires feature an asymmetrical tread design to focus on transmitting torque to the road with specialized features enhancing cornering power. P Zero Direzionale front position tires feature a directional tread design to focus on hydroplaning resistance and wet surface road holding for cars fitted with wide section width front tires. Both tires' internal structure features twin steel belts reinforced with nylon cap plies on top of a rayon casing to blend responsive handling with high-speed durability.

Configuration Options:

Asymmetric Front and Rear


This configuration is particularly suited where dry surface performance outweighs the demand for resistance to hydroplaning during high-speed road and/or track use. This configuration is well suited to cars with medium to narrow section front tires and is a must for front-engine front-wheel and four-wheel drive cars.

Directional Front and Asymmetrical Rear


This configuration is particularly suited to mid- or rear-engine cars, front engine or rear-drive axle cars with wide wheels and tires for high-speed use in variable wet and dry conditions.

 

Not really opposite of the other. Each tyre, correctly mounted has the same pattern/compound on the inside edge and the same pattern/compound on the outer edge, yes they're going to rotate in different ways, effectively reversing the pattern but there is still quite a lot of symmetry going on.

You'll normally see noticeably larger blocks of rubber on the outside edge, often with a harder rubber compound too. On the inner section you tend to get smaller blocks which are less stiff and move around and warm up more. The idea is the outer blocks give greater cornering grip and the inner ones are better for producing grip in wet or cold conditions.

If you look at the ring of rubber immediately in from each edge you'll see it's almost continuous on the outer side and regularly broken on the inner side.