Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/50r22 vs 33/12.5r22 Tire Comparison Side By Side
  285/50-22 33/12.5-22 Difference
Diameter inches (mm) 33.22 (843.8) 33.02 (838.64) -0.2 (-5.16) -0.6%
Width inches (mm) 11.22 (285) 12.52 (318) 1.3 (33) 11.6%
Circum. inches (mm) 104.37 (2650.88) 103.73 (2634.67) -0.64 (-16.21) -0.6%
Sidewall Height inches (mm) 5.61 (142.5) 5.51 (139.92) -0.1 (-2.58) -1.8%
Revolutions per mile (km) 607.1 (377.23) 610.83 (379.55) 3.74 (2.32) 0.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.88 mph (31.99 km/h)
25 mph (40.23 km/h)24.85 mph (39.99 km/h)
30 mph (48.28 km/h)29.82 mph (47.99 km/h)
35 mph (56.33 km/h)34.79 mph (55.98 km/h)
40 mph (64.37 km/h)39.76 mph (63.98 km/h)
45 mph (72.42 km/h)44.72 mph (71.98 km/h)
50 mph (80.47 km/h)49.69 mph (79.98 km/h)
55 mph (88.51 km/h)54.66 mph (87.97 km/h)
60 mph (96.56 km/h)59.63 mph (95.97 km/h)
65 mph (104.61 km/h)64.6 mph (103.97 km/h)
70 mph (112.65 km/h)69.57 mph (111.97 km/h)
75 mph (120.7 km/h)74.54 mph (119.96 km/h)
80 mph (128.75 km/h)79.51 mph (127.96 km/h)
85 mph (136.79 km/h)84.48 mph (135.96 km/h)
90 mph (144.84 km/h)89.45 mph (143.96 km/h)
95 mph (152.89 km/h)94.42 mph (151.95 km/h)
100 mph (160.93 km/h)99.39 mph (159.95 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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