Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/65r17 vs 255/30r22 Tire Comparison Side By Side
  225/65-17 255/30-22 Difference
Diameter inches (mm) 28.52 (724.3) 28.02 (711.8) -0.49 (-12.5) -1.7%
Width inches (mm) 8.86 (225) 10.04 (255) 1.18 (30) 13.3%
Circum. inches (mm) 89.58 (2275.46) 88.04 (2236.19) -1.55 (-39.27) -1.7%
Sidewall Height inches (mm) 5.76 (146.25) 3.01 (76.5) -2.75 (-69.75) -47.7%
Revolutions per mile (km) 707.26 (439.47) 719.68 (447.19) 12.42 (7.72) 1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.65 mph (31.63 km/h)
25 mph (40.23 km/h)24.57 mph (39.54 km/h)
30 mph (48.28 km/h)29.48 mph (47.45 km/h)
35 mph (56.33 km/h)34.4 mph (55.36 km/h)
40 mph (64.37 km/h)39.31 mph (63.26 km/h)
45 mph (72.42 km/h)44.22 mph (71.17 km/h)
50 mph (80.47 km/h)49.14 mph (79.08 km/h)
55 mph (88.51 km/h)54.05 mph (86.99 km/h)
60 mph (96.56 km/h)58.96 mph (94.89 km/h)
65 mph (104.61 km/h)63.88 mph (102.8 km/h)
70 mph (112.65 km/h)68.79 mph (110.71 km/h)
75 mph (120.7 km/h)73.71 mph (118.62 km/h)
80 mph (128.75 km/h)78.62 mph (126.53 km/h)
85 mph (136.79 km/h)83.53 mph (134.43 km/h)
90 mph (144.84 km/h)88.45 mph (142.34 km/h)
95 mph (152.89 km/h)93.36 mph (150.25 km/h)
100 mph (160.93 km/h)98.27 mph (158.16 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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