Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/50r15 vs 295/50r15 Tire Comparison Side By Side
  265/50-15 295/50-15 Difference
Diameter inches (mm) 25.43 (646) 26.61 (676) 1.18 (30) 4.6%
Width inches (mm) 10.43 (265) 11.61 (295) 1.18 (30) 11.3%
Circum. inches (mm) 79.9 (2029.47) 83.61 (2123.72) 3.71 (94.25) 4.6%
Sidewall Height inches (mm) 5.22 (132.5) 5.81 (147.5) 0.59 (15) 11.3%
Revolutions per mile (km) 792.99 (492.74) 757.8 (470.87) -35.19 (-21.87) -4.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.93 mph (33.68 km/h)
25 mph (40.23 km/h)26.16 mph (42.1 km/h)
30 mph (48.28 km/h)31.39 mph (50.52 km/h)
35 mph (56.33 km/h)36.63 mph (58.94 km/h)
40 mph (64.37 km/h)41.86 mph (67.36 km/h)
45 mph (72.42 km/h)47.09 mph (75.78 km/h)
50 mph (80.47 km/h)52.32 mph (84.2 km/h)
55 mph (88.51 km/h)57.55 mph (92.62 km/h)
60 mph (96.56 km/h)62.79 mph (101.05 km/h)
65 mph (104.61 km/h)68.02 mph (109.47 km/h)
70 mph (112.65 km/h)73.25 mph (117.89 km/h)
75 mph (120.7 km/h)78.48 mph (126.31 km/h)
80 mph (128.75 km/h)83.72 mph (134.73 km/h)
85 mph (136.79 km/h)88.95 mph (143.15 km/h)
90 mph (144.84 km/h)94.18 mph (151.57 km/h)
95 mph (152.89 km/h)99.41 mph (159.99 km/h)
100 mph (160.93 km/h)104.64 mph (168.41 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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