Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/95r14 vs 29/10r14 Tire Comparison Side By Side
  185/95-14 29/10-14 Difference
Diameter inches (mm) 27.84 (707.1) 29 (736.6) 1.16 (29.5) 4.2%
Width inches (mm) 7.28 (185) 10 (254) 2.72 (69) 37.3%
Circum. inches (mm) 87.46 (2221.42) 91.11 (2314.1) 3.65 (92.68) 4.2%
Sidewall Height inches (mm) 6.92 (175.75) 7.5 (190.5) 0.58 (14.75) 8.4%
Revolutions per mile (km) 724.47 (450.16) 695.45 (432.13) -29.01 (-18.03) -4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.83 mph (33.53 km/h)
25 mph (40.23 km/h)26.04 mph (41.91 km/h)
30 mph (48.28 km/h)31.25 mph (50.29 km/h)
35 mph (56.33 km/h)36.46 mph (58.68 km/h)
40 mph (64.37 km/h)41.67 mph (67.06 km/h)
45 mph (72.42 km/h)46.88 mph (75.44 km/h)
50 mph (80.47 km/h)52.09 mph (83.82 km/h)
55 mph (88.51 km/h)57.29 mph (92.21 km/h)
60 mph (96.56 km/h)62.5 mph (100.59 km/h)
65 mph (104.61 km/h)67.71 mph (108.97 km/h)
70 mph (112.65 km/h)72.92 mph (117.35 km/h)
75 mph (120.7 km/h)78.13 mph (125.74 km/h)
80 mph (128.75 km/h)83.34 mph (134.12 km/h)
85 mph (136.79 km/h)88.55 mph (142.5 km/h)
90 mph (144.84 km/h)93.75 mph (150.88 km/h)
95 mph (152.89 km/h)98.96 mph (159.27 km/h)
100 mph (160.93 km/h)104.17 mph (167.65 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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