Mike "Wuzzy121". Rest in peace, brother

Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/70r16 vs 225/70r16 Tire Comparison Side By Side
  215/70-16 225/70-16 Difference
Diameter inches (mm) 27.85 (707.4) 28.4 (721.4) 0.55 (14) 2%
Width inches (mm) 8.46 (215) 8.86 (225) 0.39 (10) 4.7%
Circum. inches (mm) 87.49 (2222.36) 89.23 (2266.34) 1.73 (43.98) 2%
Sidewall Height inches (mm) 5.93 (150.5) 6.2 (157.5) 0.28 (7) 4.7%
Revolutions per mile (km) 724.16 (449.97) 710.11 (441.24) -14.05 (-8.73) -1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.4 mph (32.82 km/h)
25 mph (40.23 km/h)25.49 mph (41.03 km/h)
30 mph (48.28 km/h)30.59 mph (49.24 km/h)
35 mph (56.33 km/h)35.69 mph (57.44 km/h)
40 mph (64.37 km/h)40.79 mph (65.65 km/h)
45 mph (72.42 km/h)45.89 mph (73.85 km/h)
50 mph (80.47 km/h)50.99 mph (82.06 km/h)
55 mph (88.51 km/h)56.09 mph (90.27 km/h)
60 mph (96.56 km/h)61.19 mph (98.47 km/h)
65 mph (104.61 km/h)66.29 mph (106.68 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
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