Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
190/60r15 vs 195/70r15 Tire Comparison Side By Side
  190/60-15 195/70-15 Difference
Diameter inches (mm) 23.98 (609) 25.75 (654) 1.77 (45) 7.4%
Width inches (mm) 7.48 (190) 7.68 (195) 0.2 (5) 2.6%
Circum. inches (mm) 75.32 (1913.23) 80.89 (2054.6) 5.57 (141.37) 7.4%
Sidewall Height inches (mm) 4.49 (114) 5.37 (136.5) 0.89 (22.5) 19.7%
Revolutions per mile (km) 841.17 (522.68) 783.29 (486.71) -57.88 (-35.96) -6.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.48 mph (34.57 km/h)
25 mph (40.23 km/h)26.85 mph (43.21 km/h)
30 mph (48.28 km/h)32.22 mph (51.85 km/h)
35 mph (56.33 km/h)37.59 mph (60.49 km/h)
40 mph (64.37 km/h)42.96 mph (69.13 km/h)
45 mph (72.42 km/h)48.33 mph (77.77 km/h)
50 mph (80.47 km/h)53.69 mph (86.41 km/h)
55 mph (88.51 km/h)59.06 mph (95.05 km/h)
60 mph (96.56 km/h)64.43 mph (103.7 km/h)
65 mph (104.61 km/h)69.8 mph (112.34 km/h)
70 mph (112.65 km/h)75.17 mph (120.98 km/h)
75 mph (120.7 km/h)80.54 mph (129.62 km/h)
80 mph (128.75 km/h)85.91 mph (138.26 km/h)
85 mph (136.79 km/h)91.28 mph (146.9 km/h)
90 mph (144.84 km/h)96.65 mph (155.54 km/h)
95 mph (152.89 km/h)102.02 mph (164.19 km/h)
100 mph (160.93 km/h)107.39 mph (172.83 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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