ECO PRO A/S Tires by Arroyo®. Season: All Season. Type: Fuel Efficient. If predictability and ease of control are what you are after, go with superior-quality Arroyo ECO PRO A-S tires. They feature a unique tread design that not only ensures maximum ride comfort and safety on wet roads but also allows you to enjoy quiet driving. Four wide longitudinal grooves will evacuate water quickly while optimized pitch width and sequence and slated grooves will effectively reduce noise. On top of this, these tires are designed to improve fuel economy.