Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/40r17 vs 195/50r17 Tire Comparison Side By Side
  195/40-17 195/50-17 Difference
Diameter inches (mm) 23.14 (587.8) 24.68 (626.8) 1.54 (39) 6.6%
Width inches (mm) 7.68 (195) 7.68 (195) 0 (0) 0%
Circum. inches (mm) 72.7 (1846.63) 77.53 (1969.15) 4.82 (122.52) 6.6%
Sidewall Height inches (mm) 3.07 (78) 3.84 (97.5) 0.77 (19.5) 25%
Revolutions per mile (km) 871.5 (541.53) 817.28 (507.83) -54.23 (-33.69) -6.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.33 mph (34.32 km/h)
25 mph (40.23 km/h)26.66 mph (42.9 km/h)
30 mph (48.28 km/h)31.99 mph (51.48 km/h)
35 mph (56.33 km/h)37.32 mph (60.06 km/h)
40 mph (64.37 km/h)42.65 mph (68.65 km/h)
45 mph (72.42 km/h)47.99 mph (77.23 km/h)
50 mph (80.47 km/h)53.32 mph (85.81 km/h)
55 mph (88.51 km/h)58.65 mph (94.39 km/h)
60 mph (96.56 km/h)63.98 mph (102.97 km/h)
65 mph (104.61 km/h)69.31 mph (111.55 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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