Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/50r20 vs 265/35r22 Tire Comparison Side By Side
  255/50-20 265/35-22 Difference
Diameter inches (mm) 30.04 (763) 29.3 (744.3) -0.74 (-18.7) -2.5%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 94.37 (2397.04) 92.06 (2338.29) -2.31 (-58.75) -2.5%
Sidewall Height inches (mm) 5.02 (127.5) 3.65 (92.75) -1.37 (-34.75) -27.3%
Revolutions per mile (km) 671.39 (417.18) 688.26 (427.66) 16.87 (10.48) 2.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.51 mph (31.4 km/h)
25 mph (40.23 km/h)24.39 mph (39.25 km/h)
30 mph (48.28 km/h)29.26 mph (47.1 km/h)
35 mph (56.33 km/h)34.14 mph (54.95 km/h)
40 mph (64.37 km/h)39.02 mph (62.8 km/h)
45 mph (72.42 km/h)43.9 mph (70.65 km/h)
50 mph (80.47 km/h)48.77 mph (78.5 km/h)
55 mph (88.51 km/h)53.65 mph (86.34 km/h)
60 mph (96.56 km/h)58.53 mph (94.19 km/h)
65 mph (104.61 km/h)63.41 mph (102.04 km/h)
70 mph (112.65 km/h)68.28 mph (109.89 km/h)
75 mph (120.7 km/h)73.16 mph (117.74 km/h)
80 mph (128.75 km/h)78.04 mph (125.59 km/h)
85 mph (136.79 km/h)82.92 mph (133.44 km/h)
90 mph (144.84 km/h)87.79 mph (141.29 km/h)
95 mph (152.89 km/h)92.67 mph (149.14 km/h)
100 mph (160.93 km/h)97.55 mph (156.99 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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