I always bought gommadiretto because of the new ti...

I always bought gommadiretto because of the new tires to max 10 months ... have difficulty balancing are punctual precise ... what happened ??? in March 2019 I purchased a tire for the bike arrived on time but two years old as photos ... on a bike you feel the difference, especially if it is two-compound, the rubber is dry. I hope that it was a case and not getting worse as quality.