Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/75r15 vs 245/75r16 Tire Comparison Side By Side
  245/75-15 245/75-16 Difference
Diameter inches (mm) 29.47 (748.5) 30.47 (773.9) 1 (25.4) 3.4%
Width inches (mm) 9.65 (245) 9.65 (245) 0 (0) 0%
Circum. inches (mm) 92.58 (2351.48) 95.72 (2431.28) 3.14 (79.8) 3.4%
Sidewall Height inches (mm) 7.23 (183.75) 7.23 (183.75) 0 (0) 0%
Revolutions per mile (km) 684.4 (425.26) 661.93 (411.31) -22.46 (-13.96) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.68 mph (33.28 km/h)
25 mph (40.23 km/h)25.85 mph (41.6 km/h)
30 mph (48.28 km/h)31.02 mph (49.92 km/h)
35 mph (56.33 km/h)36.19 mph (58.24 km/h)
40 mph (64.37 km/h)41.36 mph (66.56 km/h)
45 mph (72.42 km/h)46.53 mph (74.88 km/h)
50 mph (80.47 km/h)51.7 mph (83.2 km/h)
55 mph (88.51 km/h)56.87 mph (91.52 km/h)
60 mph (96.56 km/h)62.04 mph (99.84 km/h)
65 mph (104.61 km/h)67.21 mph (108.16 km/h)
70 mph (112.65 km/h)72.38 mph (116.48 km/h)
75 mph (120.7 km/h)77.55 mph (124.8 km/h)
80 mph (128.75 km/h)82.71 mph (133.12 km/h)
85 mph (136.79 km/h)87.88 mph (141.44 km/h)
90 mph (144.84 km/h)93.05 mph (149.76 km/h)
95 mph (152.89 km/h)98.22 mph (158.08 km/h)
100 mph (160.93 km/h)103.39 mph (166.4 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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