Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
250/70r17 vs 200/60r17 Tire Comparison Side By Side
  250/70-17 200/60-17 Difference
Diameter inches (mm) 30.78 (781.8) 26.45 (671.8) -4.33 (-110) -14.1%
Width inches (mm) 9.84 (250) 7.87 (200) -1.97 (-50) -20%
Circum. inches (mm) 96.7 (2456.1) 83.09 (2110.52) -13.61 (-345.58) -14.1%
Sidewall Height inches (mm) 6.89 (175) 4.72 (120) -2.17 (-55) -31.4%
Revolutions per mile (km) 655.24 (407.15) 762.53 (473.82) 107.29 (66.67) 16.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.19 mph (27.66 km/h)
25 mph (40.23 km/h)21.48 mph (34.57 km/h)
30 mph (48.28 km/h)25.78 mph (41.49 km/h)
35 mph (56.33 km/h)30.08 mph (48.4 km/h)
40 mph (64.37 km/h)34.37 mph (55.32 km/h)
45 mph (72.42 km/h)38.67 mph (62.23 km/h)
50 mph (80.47 km/h)42.96 mph (69.15 km/h)
55 mph (88.51 km/h)47.26 mph (76.06 km/h)
60 mph (96.56 km/h)51.56 mph (82.97 km/h)
65 mph (104.61 km/h)55.85 mph (89.89 km/h)
70 mph (112.65 km/h)60.15 mph (96.8 km/h)
75 mph (120.7 km/h)64.45 mph (103.72 km/h)
80 mph (128.75 km/h)68.74 mph (110.63 km/h)
85 mph (136.79 km/h)73.04 mph (117.55 km/h)
90 mph (144.84 km/h)77.34 mph (124.46 km/h)
95 mph (152.89 km/h)81.63 mph (131.38 km/h)
100 mph (160.93 km/h)85.93 mph (138.29 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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