Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/30r22 vs 285/35r22 Tire Comparison Side By Side
  305/30-22 285/35-22 Difference
Diameter inches (mm) 29.2 (741.8) 29.85 (758.3) 0.65 (16.5) 2.2%
Width inches (mm) 12.01 (305) 11.22 (285) -0.79 (-20) -6.6%
Circum. inches (mm) 91.75 (2330.43) 93.79 (2382.27) 2.04 (51.84) 2.2%
Sidewall Height inches (mm) 3.6 (91.5) 3.93 (99.75) 0.32 (8.25) 9%
Revolutions per mile (km) 690.58 (429.1) 675.55 (419.77) -15.03 (-9.34) -2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.44 mph (32.9 km/h)
25 mph (40.23 km/h)25.56 mph (41.13 km/h)
30 mph (48.28 km/h)30.67 mph (49.35 km/h)
35 mph (56.33 km/h)35.78 mph (57.58 km/h)
40 mph (64.37 km/h)40.89 mph (65.81 km/h)
45 mph (72.42 km/h)46 mph (74.03 km/h)
50 mph (80.47 km/h)51.11 mph (82.26 km/h)
55 mph (88.51 km/h)56.22 mph (90.48 km/h)
60 mph (96.56 km/h)61.33 mph (98.71 km/h)
65 mph (104.61 km/h)66.45 mph (106.93 km/h)
70 mph (112.65 km/h)71.56 mph (115.16 km/h)
75 mph (120.7 km/h)76.67 mph (123.39 km/h)
80 mph (128.75 km/h)81.78 mph (131.61 km/h)
85 mph (136.79 km/h)86.89 mph (139.84 km/h)
90 mph (144.84 km/h)92 mph (148.06 km/h)
95 mph (152.89 km/h)97.11 mph (156.29 km/h)
100 mph (160.93 km/h)102.22 mph (164.51 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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