Tires & Fuel Economy Calculators

http://www.ecopiatrucktires.com/Calculator   (Big Rig-Bridgestone)

http://www.michelintruck.com/michelintruck/toolbox/FuelSavcalculator.jsp (Big Rig-Michelin)

http://www.yokohamatire.com/fuel_calculator/  (Big Rig-Yokohama)

http://www.continental-truck.com/www/transport_us_en/themes/calculator.html (Big Rig- Continental)

http://www.goodyear.com/truck/technology/calculator.html  (Big Rig-Goodyear)