- Low Rolling Resistance - Toyo engineers designed Proxes A20 tires to maximize your vehicle's fuel efficiency by reducing their rolling resistance. The silica compound and cap/base tread compound reduce the amount of energy the vehicle needs to burn in moving the car. That can translate to less fuel burned per mile you drive. According to the U.S. Department of Energy, you can also save up to $0.34 per gallon simply by keeping your engine properly tuned, keeping your tires inflated to your automaker's specifications, and using the recommended grade of motor oil for your vehicle. - Dry and Wet Braking - The 4 tread grooves in the design of these tires remove water from underneath the tires in rainy driving conditions. If your tires don't have adequate drainage built into their design, you may hydroplane, which could cause you to lose control of your vehicle.