Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
115/70r16 vs 195/60r16 Tire Comparison Side By Side
  115/70-16 195/60-16 Difference
Diameter inches (mm) 22.34 (567.4) 25.21 (640.4) 2.87 (73) 12.9%
Width inches (mm) 4.53 (115) 7.68 (195) 3.15 (80) 69.6%
Circum. inches (mm) 70.18 (1782.54) 79.21 (2011.88) 9.03 (229.34) 12.9%
Sidewall Height inches (mm) 3.17 (80.5) 4.61 (117) 1.44 (36.5) 45.3%
Revolutions per mile (km) 902.84 (561) 799.92 (497.05) -102.92 (-63.95) -11.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.57 mph (36.33 km/h)
25 mph (40.23 km/h)28.22 mph (45.41 km/h)
30 mph (48.28 km/h)33.86 mph (54.49 km/h)
35 mph (56.33 km/h)39.5 mph (63.57 km/h)
40 mph (64.37 km/h)45.15 mph (72.66 km/h)
45 mph (72.42 km/h)50.79 mph (81.74 km/h)
50 mph (80.47 km/h)56.43 mph (90.82 km/h)
55 mph (88.51 km/h)62.08 mph (99.9 km/h)
60 mph (96.56 km/h)67.72 mph (108.98 km/h)
65 mph (104.61 km/h)73.36 mph (118.07 km/h)
70 mph (112.65 km/h)79.01 mph (127.15 km/h)
75 mph (120.7 km/h)84.65 mph (136.23 km/h)
80 mph (128.75 km/h)90.29 mph (145.31 km/h)
85 mph (136.79 km/h)95.94 mph (154.39 km/h)
90 mph (144.84 km/h)101.58 mph (163.48 km/h)
95 mph (152.89 km/h)107.22 mph (172.56 km/h)
100 mph (160.93 km/h)112.87 mph (181.64 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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