Changing Tires Project
By: Cassady Sawyers and Eni Labinjo
Factory Tire Information
Width of tire: 254 mm
Aspect ratio: 70%
17 inch rims
Replacement Tire
Tire width: 305 mm
aspect ratio: 55%
Rim: 20 inches
Factory Miles per Gallon
17 city/ 21 hwy mpg
"K" Ratio
*divide the circumference of the bigger tire but the factory tire
K= 1.1
If your odometer reading is 50,000 miles, you have actually traveled 55,000 miles on the new tires
*mutiply the k ratio (1.1) by the odometer reading (50,000)
If your speedometer reading 70, your speed is 77 miles per hour with the new tires
*multiply the k ratio (1.1) by the speedometer reading (70)
If your mile per gallon with factory tire is 21 hwy, what is your mile per gallon with the new tires?
*multiply the k ratio (1.1) by the factory mile per gallon (21 hwy)
New tire miles per gallon is 23.1 mpg