Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/80r16 vs 215/70r16 Tire Comparison Side By Side
  195/80-16 215/70-16 Difference
Diameter inches (mm) 28.28 (718.4) 27.85 (707.4) -0.43 (-11) -1.5%
Width inches (mm) 7.68 (195) 8.46 (215) 0.79 (20) 10.3%
Circum. inches (mm) 88.86 (2256.92) 87.49 (2222.36) -1.36 (-34.56) -1.5%
Sidewall Height inches (mm) 6.14 (156) 5.93 (150.5) -0.22 (-5.5) -3.5%
Revolutions per mile (km) 713.07 (443.08) 724.16 (449.97) 11.09 (6.89) 1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.69 mph (31.69 km/h)
25 mph (40.23 km/h)24.62 mph (39.62 km/h)
30 mph (48.28 km/h)29.54 mph (47.54 km/h)
35 mph (56.33 km/h)34.46 mph (55.46 km/h)
40 mph (64.37 km/h)39.39 mph (63.39 km/h)
45 mph (72.42 km/h)44.31 mph (71.31 km/h)
50 mph (80.47 km/h)49.23 mph (79.24 km/h)
55 mph (88.51 km/h)54.16 mph (87.16 km/h)
60 mph (96.56 km/h)59.08 mph (95.08 km/h)
65 mph (104.61 km/h)64 mph (103.01 km/h)
70 mph (112.65 km/h)68.93 mph (110.93 km/h)
75 mph (120.7 km/h)73.85 mph (118.85 km/h)
80 mph (128.75 km/h)78.78 mph (126.78 km/h)
85 mph (136.79 km/h)83.7 mph (134.7 km/h)
90 mph (144.84 km/h)88.62 mph (142.62 km/h)
95 mph (152.89 km/h)93.55 mph (150.55 km/h)
100 mph (160.93 km/h)98.47 mph (158.47 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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