Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
220/70r14 vs 195/70r15 Tire Comparison Side By Side
  220/70-14 195/70-15 Difference
Diameter inches (mm) 26.13 (663.6) 25.75 (654) -0.38 (-9.6) -1.4%
Width inches (mm) 8.66 (220) 7.68 (195) -0.98 (-25) -11.4%
Circum. inches (mm) 82.08 (2084.76) 80.89 (2054.6) -1.19 (-30.16) -1.4%
Sidewall Height inches (mm) 6.06 (154) 5.37 (136.5) -0.69 (-17.5) -11.4%
Revolutions per mile (km) 771.96 (479.67) 783.29 (486.71) 11.33 (7.04) 1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.71 mph (31.72 km/h)
25 mph (40.23 km/h)24.64 mph (39.65 km/h)
30 mph (48.28 km/h)29.57 mph (47.58 km/h)
35 mph (56.33 km/h)34.49 mph (55.51 km/h)
40 mph (64.37 km/h)39.42 mph (63.44 km/h)
45 mph (72.42 km/h)44.35 mph (71.37 km/h)
50 mph (80.47 km/h)49.28 mph (79.3 km/h)
55 mph (88.51 km/h)54.2 mph (87.23 km/h)
60 mph (96.56 km/h)59.13 mph (95.16 km/h)
65 mph (104.61 km/h)64.06 mph (103.09 km/h)
70 mph (112.65 km/h)68.99 mph (111.02 km/h)
75 mph (120.7 km/h)73.92 mph (118.95 km/h)
80 mph (128.75 km/h)78.84 mph (126.89 km/h)
85 mph (136.79 km/h)83.77 mph (134.82 km/h)
90 mph (144.84 km/h)88.7 mph (142.75 km/h)
95 mph (152.89 km/h)93.63 mph (150.68 km/h)
100 mph (160.93 km/h)98.55 mph (158.61 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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