Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/70r13 vs 195/70r14 Tire Comparison Side By Side
  165/70-13 195/70-14 Difference
Diameter inches (mm) 22.09 (561.2) 24.75 (628.6) 2.65 (67.4) 12%
Width inches (mm) 6.5 (165) 7.68 (195) 1.18 (30) 18.2%
Circum. inches (mm) 69.41 (1763.06) 77.75 (1974.81) 8.34 (211.74) 12%
Sidewall Height inches (mm) 4.55 (115.5) 5.37 (136.5) 0.83 (21) 18.2%
Revolutions per mile (km) 912.81 (567.19) 814.94 (506.38) -97.87 (-60.82) -10.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.4 mph (36.05 km/h)
25 mph (40.23 km/h)28 mph (45.07 km/h)
30 mph (48.28 km/h)33.6 mph (54.08 km/h)
35 mph (56.33 km/h)39.2 mph (63.09 km/h)
40 mph (64.37 km/h)44.8 mph (72.11 km/h)
45 mph (72.42 km/h)50.4 mph (81.12 km/h)
50 mph (80.47 km/h)56 mph (90.13 km/h)
55 mph (88.51 km/h)61.61 mph (99.14 km/h)
60 mph (96.56 km/h)67.21 mph (108.16 km/h)
65 mph (104.61 km/h)72.81 mph (117.17 km/h)
70 mph (112.65 km/h)78.41 mph (126.18 km/h)
75 mph (120.7 km/h)84.01 mph (135.2 km/h)
80 mph (128.75 km/h)89.61 mph (144.21 km/h)
85 mph (136.79 km/h)95.21 mph (153.22 km/h)
90 mph (144.84 km/h)100.81 mph (162.24 km/h)
95 mph (152.89 km/h)106.41 mph (171.25 km/h)
100 mph (160.93 km/h)112.01 mph (180.26 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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