TireSize&SpeedometerCorrector

Calculate tire diameter, circumference, and speedometer error when changing tire sizes.

Width (mm)

Aspect Ratio

Rim Diameter (in)

Tire Diameter

25.97" / 660mm

Circumference

82"

Revs per Mile

777

Old Tire (current)

Width

Aspect

Rim

New Tire

Width

Aspect

Rim

Speedometer Reading (mph)

Actual Speed

61.72 mph

Within safe tolerance (2.87% error)

About This Tool

Calculate tire diameter, circumference, and speedometer error when changing tire sizes.