Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/85r16 vs 215/85r16 Tire Comparison Side By Side
  195/85-16 215/85-16 Difference
Diameter inches (mm) 29.05 (737.9) 30.39 (771.9) 1.34 (34) 4.6%
Width inches (mm) 7.68 (195) 8.46 (215) 0.79 (20) 10.3%
Circum. inches (mm) 91.27 (2318.18) 95.47 (2425) 4.21 (106.81) 4.6%
Sidewall Height inches (mm) 6.53 (165.75) 7.19 (182.75) 0.67 (17) 10.3%
Revolutions per mile (km) 694.23 (431.37) 663.65 (412.37) -30.58 (-19) -4.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.92 mph (33.67 km/h)
25 mph (40.23 km/h)26.15 mph (42.09 km/h)
30 mph (48.28 km/h)31.38 mph (50.51 km/h)
35 mph (56.33 km/h)36.61 mph (58.92 km/h)
40 mph (64.37 km/h)41.84 mph (67.34 km/h)
45 mph (72.42 km/h)47.07 mph (75.76 km/h)
50 mph (80.47 km/h)52.3 mph (84.18 km/h)
55 mph (88.51 km/h)57.53 mph (92.59 km/h)
60 mph (96.56 km/h)62.76 mph (101.01 km/h)
65 mph (104.61 km/h)67.99 mph (109.43 km/h)
70 mph (112.65 km/h)73.23 mph (117.85 km/h)
75 mph (120.7 km/h)78.46 mph (126.26 km/h)
80 mph (128.75 km/h)83.69 mph (134.68 km/h)
85 mph (136.79 km/h)88.92 mph (143.1 km/h)
90 mph (144.84 km/h)94.15 mph (151.52 km/h)
95 mph (152.89 km/h)99.38 mph (159.93 km/h)
100 mph (160.93 km/h)104.61 mph (168.35 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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