Changing Tires Project

by: Zach W. and Chandy C. Bellish 3rd 11/3/13

Car Used

2005 Chevy Silverado extended cab


Rim Information

2008 GMC stock rims


P265/70R17



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Miles Per Gallon

This Chevy pick up holds 15 miles to the gallon.


Chart for 2008 GMC Yukon rims

Width: 265 mm or 10.43 inches

Aspect Ratio: 70%

Height: 7.3 inches

Diameter: 31.6 inches

Circumfrence: 99.3 inches

Replacement Tire

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Information for GMC Yukon replacement tire

P245/75R16

Chart for GMC Yukon replacement tire

Width: 245mm or 9.6 inches

Aspect ratio: 75%

Height: 6.7 inches

Diameter: 29.4 inches

Circumfrence: 92.4 inches

"K" Ratio

Circumference of bigger tire= 99.3 inches


Circumference of smaller tire= 92.4 inches


Difference = 6.9 inches


Ratio= 1.075

Statements

1. it actually says 53,750 miles instead of 50,000

2. It will read 75 MPH instead of 70

3. It actually has 16.13 MPG instead of 15


Math

1. 50,000 X 1.075= 53,750 Miles

2. 70 X 1.075= 75 MPH

3. 15 X 1.075= 16.13 MPG