Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
365/75r16 vs 375/75r16 Tire Comparison Side By Side
  365/75-16 375/75-16 Difference
Diameter inches (mm) 37.56 (953.9) 38.15 (968.9) 0.59 (15) 1.6%
Width inches (mm) 14.37 (365) 14.76 (375) 0.39 (10) 2.7%
Circum. inches (mm) 117.98 (2996.77) 119.84 (3043.89) 1.86 (47.12) 1.6%
Sidewall Height inches (mm) 10.78 (273.75) 11.07 (281.25) 0.3 (7.5) 2.7%
Revolutions per mile (km) 537.03 (333.69) 528.71 (328.53) -8.31 (-5.17) -1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.31 mph (32.69 km/h)
25 mph (40.23 km/h)25.39 mph (40.87 km/h)
30 mph (48.28 km/h)30.47 mph (49.04 km/h)
35 mph (56.33 km/h)35.55 mph (57.21 km/h)
40 mph (64.37 km/h)40.63 mph (65.39 km/h)
45 mph (72.42 km/h)45.71 mph (73.56 km/h)
50 mph (80.47 km/h)50.79 mph (81.73 km/h)
55 mph (88.51 km/h)55.86 mph (89.91 km/h)
60 mph (96.56 km/h)60.94 mph (98.08 km/h)
65 mph (104.61 km/h)66.02 mph (106.25 km/h)
70 mph (112.65 km/h)71.1 mph (114.43 km/h)
75 mph (120.7 km/h)76.18 mph (122.6 km/h)
80 mph (128.75 km/h)81.26 mph (130.77 km/h)
85 mph (136.79 km/h)86.34 mph (138.95 km/h)
90 mph (144.84 km/h)91.42 mph (147.12 km/h)
95 mph (152.89 km/h)96.49 mph (155.29 km/h)
100 mph (160.93 km/h)101.57 mph (163.47 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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