Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r17 vs 35/12.5r17 Tire Comparison Side By Side
  265/70-17 35/12.5-17 Difference
Diameter inches (mm) 31.61 (802.8) 35.03 (889.72) 3.42 (86.92) 10.8%
Width inches (mm) 10.43 (265) 12.52 (318) 2.09 (53) 20%
Circum. inches (mm) 99.29 (2522.07) 110.04 (2795.14) 10.75 (273.07) 10.8%
Sidewall Height inches (mm) 7.3 (185.5) 9.01 (228.96) 1.71 (43.46) 23.4%
Revolutions per mile (km) 638.1 (396.5) 575.77 (357.76) -62.34 (-38.74) -9.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.17 mph (35.67 km/h)
25 mph (40.23 km/h)27.71 mph (44.59 km/h)
30 mph (48.28 km/h)33.25 mph (53.51 km/h)
35 mph (56.33 km/h)38.79 mph (62.43 km/h)
40 mph (64.37 km/h)44.33 mph (71.34 km/h)
45 mph (72.42 km/h)49.87 mph (80.26 km/h)
50 mph (80.47 km/h)55.41 mph (89.18 km/h)
55 mph (88.51 km/h)60.95 mph (98.1 km/h)
60 mph (96.56 km/h)66.5 mph (107.02 km/h)
65 mph (104.61 km/h)72.04 mph (115.93 km/h)
70 mph (112.65 km/h)77.58 mph (124.85 km/h)
75 mph (120.7 km/h)83.12 mph (133.77 km/h)
80 mph (128.75 km/h)88.66 mph (142.69 km/h)
85 mph (136.79 km/h)94.2 mph (151.61 km/h)
90 mph (144.84 km/h)99.74 mph (160.52 km/h)
95 mph (152.89 km/h)105.29 mph (169.44 km/h)
100 mph (160.93 km/h)110.83 mph (178.36 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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