Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r17 vs 195/60r15 Tire Comparison Side By Side
  195/60-17 195/60-15 Difference
Diameter inches (mm) 26.21 (665.8) 24.21 (615) -2 (-50.8) -7.6%
Width inches (mm) 7.68 (195) 7.68 (195) 0 (0) 0%
Circum. inches (mm) 82.35 (2091.67) 76.07 (1932.08) -6.28 (-159.59) -7.6%
Sidewall Height inches (mm) 4.61 (117) 4.61 (117) 0 (0) 0%
Revolutions per mile (km) 769.41 (478.09) 832.96 (517.58) 63.55 (39.49) 8.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.47 mph (29.73 km/h)
25 mph (40.23 km/h)23.09 mph (37.16 km/h)
30 mph (48.28 km/h)27.71 mph (44.6 km/h)
35 mph (56.33 km/h)32.33 mph (52.03 km/h)
40 mph (64.37 km/h)36.95 mph (59.46 km/h)
45 mph (72.42 km/h)41.57 mph (66.89 km/h)
50 mph (80.47 km/h)46.19 mph (74.33 km/h)
55 mph (88.51 km/h)50.8 mph (81.76 km/h)
60 mph (96.56 km/h)55.42 mph (89.19 km/h)
65 mph (104.61 km/h)60.04 mph (96.63 km/h)
70 mph (112.65 km/h)64.66 mph (104.06 km/h)
75 mph (120.7 km/h)69.28 mph (111.49 km/h)
80 mph (128.75 km/h)73.9 mph (118.92 km/h)
85 mph (136.79 km/h)78.51 mph (126.36 km/h)
90 mph (144.84 km/h)83.13 mph (133.79 km/h)
95 mph (152.89 km/h)87.75 mph (141.22 km/h)
100 mph (160.93 km/h)92.37 mph (148.66 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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