Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
220/70r14 vs 265/60r15 Tire Comparison Side By Side
  220/70-14 265/60-15 Difference
Diameter inches (mm) 26.13 (663.6) 27.52 (699) 1.39 (35.4) 5.3%
Width inches (mm) 8.66 (220) 10.43 (265) 1.77 (45) 20.5%
Circum. inches (mm) 82.08 (2084.76) 86.46 (2195.97) 4.38 (111.21) 5.3%
Sidewall Height inches (mm) 6.06 (154) 6.26 (159) 0.2 (5) 3.2%
Revolutions per mile (km) 771.96 (479.67) 732.86 (455.38) -39.09 (-24.29) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.07 mph (33.9 km/h)
25 mph (40.23 km/h)26.33 mph (42.38 km/h)
30 mph (48.28 km/h)31.6 mph (50.86 km/h)
35 mph (56.33 km/h)36.87 mph (59.33 km/h)
40 mph (64.37 km/h)42.13 mph (67.81 km/h)
45 mph (72.42 km/h)47.4 mph (76.28 km/h)
50 mph (80.47 km/h)52.67 mph (84.76 km/h)
55 mph (88.51 km/h)57.93 mph (93.24 km/h)
60 mph (96.56 km/h)63.2 mph (101.71 km/h)
65 mph (104.61 km/h)68.47 mph (110.19 km/h)
70 mph (112.65 km/h)73.73 mph (118.66 km/h)
75 mph (120.7 km/h)79 mph (127.14 km/h)
80 mph (128.75 km/h)84.27 mph (135.62 km/h)
85 mph (136.79 km/h)89.53 mph (144.09 km/h)
90 mph (144.84 km/h)94.8 mph (152.57 km/h)
95 mph (152.89 km/h)100.07 mph (161.04 km/h)
100 mph (160.93 km/h)105.33 mph (169.52 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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