Hmmmm... it seems that the Michelin Preceda, so highly rated in the review that mr. hanky posted has an asymmetric tread pattern....
I certainly follow jomor's logic, but there must be something more to it....there must be a smart*ss out there somewhere who knows! wink
The latest in the range, Pilot Preceda, shifts performance up a gear. While delivering high precision cornering and stability, Pilot Preceda is one of the most quiet sports tyres in the market. For a look that matches its sporty action, larger Preceda tyres can be tuned to fit smaller vehicles.
Race tested tread compound
The tread compound is especially flexible to give you exceptional grip for superb handling, braking and acceleration in all conditions.
Stress Equilibrium Construction
This high-tech network of internal wirings makes sure that even under extreme pressure, stress and load is evenly distributed throughout the tyre for improved traction and longer life.
Special rim protectors on the tyre’s sidewall create an extra sporty look. They also fend off road hazards and protect costly alloy wheels from kerb damage.
Asymmetric tread pattern
Three different tread zones or tread patterns in the one tyre ensures a quiet, comfortable ride as well as great sports performance and handling. Extra blocks on the tyre’s shoulder give you more bite. This extra grip produces remarkable performance. Wet or dry, you get high level grip, at high level speeds.
Pilot Preceda’s tread profile also adds to the tyre’s performance. Designed to give you more grip and control, it gives you powerful, predictable cornering every time.
Each block in the tread is designed to flatten every time the contact patch touches the road. It’s this incredible cushioning effect that ensures Pilot Preceda’s famously quiet, comfortable ride.