Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/75r16 vs 35/12.5r17 Tire Comparison Side By Side
  265/75-16 35/12.5-17 Difference
Diameter inches (mm) 31.65 (803.9) 35.03 (889.72) 3.38 (85.82) 10.7%
Width inches (mm) 10.43 (265) 12.52 (318) 2.09 (53) 20%
Circum. inches (mm) 99.43 (2525.53) 110.04 (2795.14) 10.61 (269.61) 10.7%
Sidewall Height inches (mm) 7.82 (198.75) 9.01 (228.96) 1.19 (30.21) 15.2%
Revolutions per mile (km) 637.23 (395.96) 575.77 (357.76) -61.47 (-38.19) -9.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.14 mph (35.62 km/h)
25 mph (40.23 km/h)27.67 mph (44.53 km/h)
30 mph (48.28 km/h)33.2 mph (53.43 km/h)
35 mph (56.33 km/h)38.74 mph (62.34 km/h)
40 mph (64.37 km/h)44.27 mph (71.25 km/h)
45 mph (72.42 km/h)49.8 mph (80.15 km/h)
50 mph (80.47 km/h)55.34 mph (89.06 km/h)
55 mph (88.51 km/h)60.87 mph (97.96 km/h)
60 mph (96.56 km/h)66.41 mph (106.87 km/h)
65 mph (104.61 km/h)71.94 mph (115.77 km/h)
70 mph (112.65 km/h)77.47 mph (124.68 km/h)
75 mph (120.7 km/h)83.01 mph (133.59 km/h)
80 mph (128.75 km/h)88.54 mph (142.49 km/h)
85 mph (136.79 km/h)94.07 mph (151.4 km/h)
90 mph (144.84 km/h)99.61 mph (160.3 km/h)
95 mph (152.89 km/h)105.14 mph (169.21 km/h)
100 mph (160.93 km/h)110.68 mph (178.12 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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