Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/45r20 vs 265/35r22 Tire Comparison Side By Side
  235/45-20 265/35-22 Difference
Diameter inches (mm) 28.33 (719.5) 29.3 (744.3) 0.98 (24.8) 3.4%
Width inches (mm) 9.25 (235) 10.43 (265) 1.18 (30) 12.8%
Circum. inches (mm) 88.99 (2260.38) 92.06 (2338.29) 3.07 (77.91) 3.4%
Sidewall Height inches (mm) 4.16 (105.75) 3.65 (92.75) -0.51 (-13) -12.3%
Revolutions per mile (km) 711.98 (442.4) 688.26 (427.66) -23.72 (-14.74) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.69 mph (33.3 km/h)
25 mph (40.23 km/h)25.86 mph (41.62 km/h)
30 mph (48.28 km/h)31.03 mph (49.94 km/h)
35 mph (56.33 km/h)36.21 mph (58.27 km/h)
40 mph (64.37 km/h)41.38 mph (66.59 km/h)
45 mph (72.42 km/h)46.55 mph (74.92 km/h)
50 mph (80.47 km/h)51.72 mph (83.24 km/h)
55 mph (88.51 km/h)56.9 mph (91.57 km/h)
60 mph (96.56 km/h)62.07 mph (99.89 km/h)
65 mph (104.61 km/h)67.24 mph (108.21 km/h)
70 mph (112.65 km/h)72.41 mph (116.54 km/h)
75 mph (120.7 km/h)77.59 mph (124.86 km/h)
80 mph (128.75 km/h)82.76 mph (133.19 km/h)
85 mph (136.79 km/h)87.93 mph (141.51 km/h)
90 mph (144.84 km/h)93.1 mph (149.83 km/h)
95 mph (152.89 km/h)98.27 mph (158.16 km/h)
100 mph (160.93 km/h)103.45 mph (166.48 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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