Tire Size Comparison Tools
Compare tire sizes, calculate diameter differences, and see how changes affect your speedometer reading.
Original Tire
Example: 205/55R16
New Tire
Example: 225/50R17
Comparison Results
Original Diameter
--
inches
New Diameter
--
inches
Original Width
--
inches
New Width
--
inches
Differences
Diameter Change:
--
Width Change:
--
Circumference Change:
--
Revs/Mile Change:
--
Sidewall Height Change:
--
📊 Speedometer Reading
When your speedometer reads 60 mph,
your actual speed will be --
your actual speed will be --
Visual Comparison
Front View
Side View
Original Tire
Front View
Side View
New Tire