Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
90/90r10 vs 100/90r10 Tire Comparison Side By Side
  90/90-10 100/90-10 Difference
Diameter inches (mm) 16.38 (416) 17.09 (434) 0.71 (18) 4.3%
Width inches (mm) 3.54 (90) 3.94 (100) 0.39 (10) 11.1%
Circum. inches (mm) 51.45 (1306.9) 53.68 (1363.45) 2.23 (56.55) 4.3%
Sidewall Height inches (mm) 3.19 (81) 3.54 (90) 0.35 (9) 11.1%
Revolutions per mile (km) 1231.42 (765.17) 1180.35 (733.43) -51.07 (-31.74) -4.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.87 mph (33.58 km/h)
25 mph (40.23 km/h)26.08 mph (41.97 km/h)
30 mph (48.28 km/h)31.3 mph (50.37 km/h)
35 mph (56.33 km/h)36.51 mph (58.76 km/h)
40 mph (64.37 km/h)41.73 mph (67.16 km/h)
45 mph (72.42 km/h)46.95 mph (75.55 km/h)
50 mph (80.47 km/h)52.16 mph (83.95 km/h)
55 mph (88.51 km/h)57.38 mph (92.34 km/h)
60 mph (96.56 km/h)62.6 mph (100.74 km/h)
65 mph (104.61 km/h)67.81 mph (109.13 km/h)
70 mph (112.65 km/h)73.03 mph (117.53 km/h)
75 mph (120.7 km/h)78.25 mph (125.92 km/h)
80 mph (128.75 km/h)83.46 mph (134.32 km/h)
85 mph (136.79 km/h)88.68 mph (142.71 km/h)
90 mph (144.84 km/h)93.89 mph (151.11 km/h)
95 mph (152.89 km/h)99.11 mph (159.5 km/h)
100 mph (160.93 km/h)104.33 mph (167.9 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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