- First asymmetric tyre developed in 1965.
- Michelins XAS offered an asymmetric carcass as well as asymmetric tread pattern.
- XAS offered exceptional road holding in the bends and dramatically improved directional stability.
- Some sizes are offered as XAS FF – formula France racing compound.
Michelin XAS Tyres 180HR15 for the Citroen DS
From its launch in 1965, the Michelin XAS tyres remained the reference tyre until the end of the 70s. The first tyre with an asymmetrical tread pattern, the inside and outside of the Michelin XAS tyres work differently to give the car a good balance. 180HR15 Michelin XAS Tires were developed to improve the directional stability of the Citroen DS.
Michelin XAS Asymmetrical Tyres are just like a foot
With the XAS, Michelin made more progress by differentiating the many elements that form the tyre, leading to the creation of the Michelin XAS which was the first tyre with an asymmetrical tread pattern. The Michelin XAS was constructed taking into account the different kinds of work done by the shoulders, sidewalls and different parts of the crown, depending on whether they are on the inside or outside relative to the car. Just like a person's foot is asymmetrical, the inside and outside of a tyre work differently to give the car good balance and sure handling.
Driving on the Michelin XAS is like running on rails
This major progress allows the XAS tyre to give:
- remarkable stability
- exceptional road holding on bends
- previously unknown levels of grip in all conditions
Michelin XAS FF
The first production tyre designed to run at 210km/h (131 mph). It had such exceptional proformance it naturally led to it being used for racing in Formula France from 1968. Named the Michelin XAS FF, it was used for circuit racing, rallies, and hill climbs. The Michelin XAS FF is still avalible today in some sizes.