Tire Size Calculator

Tire Size Comparison Calculator

Tire A (Original)

/
R

Tire B (New)

/
R

Visual Comparison

Original 225/45R17 New 235/40R18

Comparison Results

Specification
Tire A
Tire B
Difference
Overall Diameter
634 mm (25.0")
634 mm (25.0")
0.0%
Circumference
1992 mm (78.4")
1992 mm (78.4")
0.0%
Revs/Mile
805
805
0.0%
Revs/KM
500
500
0.0%
Speedometer at 60mph
60.0 mph
60.0 mph
Actual: 60.0 mph
Speedometer at 100km/h
100.0 km/h
100.0 km/h
Actual: 100.0 km/h