Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r15 vs 195/65r15 Tire Comparison Side By Side
  195/60-15 195/65-15 Difference
Diameter inches (mm) 24.21 (615) 24.98 (634.5) 0.77 (19.5) 3.2%
Width inches (mm) 7.68 (195) 7.68 (195) 0 (0) 0%
Circum. inches (mm) 76.07 (1932.08) 78.48 (1993.34) 2.41 (61.26) 3.2%
Sidewall Height inches (mm) 4.61 (117) 4.99 (126.75) 0.38 (9.75) 8.3%
Revolutions per mile (km) 832.96 (517.58) 807.36 (501.67) -25.6 (-15.91) -3.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.63 mph (33.21 km/h)
25 mph (40.23 km/h)25.79 mph (41.51 km/h)
30 mph (48.28 km/h)30.95 mph (49.81 km/h)
35 mph (56.33 km/h)36.11 mph (58.11 km/h)
40 mph (64.37 km/h)41.27 mph (66.42 km/h)
45 mph (72.42 km/h)46.43 mph (74.72 km/h)
50 mph (80.47 km/h)51.59 mph (83.02 km/h)
55 mph (88.51 km/h)56.74 mph (91.32 km/h)
60 mph (96.56 km/h)61.9 mph (99.62 km/h)
65 mph (104.61 km/h)67.06 mph (107.92 km/h)
70 mph (112.65 km/h)72.22 mph (116.23 km/h)
75 mph (120.7 km/h)77.38 mph (124.53 km/h)
80 mph (128.75 km/h)82.54 mph (132.83 km/h)
85 mph (136.79 km/h)87.7 mph (141.13 km/h)
90 mph (144.84 km/h)92.85 mph (149.43 km/h)
95 mph (152.89 km/h)98.01 mph (157.74 km/h)
100 mph (160.93 km/h)103.17 mph (166.04 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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