Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/35r17 vs 245/70r17 Tire Comparison Side By Side
  245/35-17 245/70-17 Difference
Diameter inches (mm) 23.75 (603.3) 30.5 (774.8) 6.75 (171.5) 28.4%
Width inches (mm) 9.65 (245) 9.65 (245) 0 (0) 0%
Circum. inches (mm) 74.62 (1895.32) 95.83 (2434.11) 21.21 (538.78) 28.4%
Sidewall Height inches (mm) 3.38 (85.75) 6.75 (171.5) 3.38 (85.75) 100%
Revolutions per mile (km) 849.11 (527.61) 661.16 (410.83) -187.95 (-116.79) -22.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)25.69 mph (41.34 km/h)
25 mph (40.23 km/h)32.11 mph (51.67 km/h)
30 mph (48.28 km/h)38.53 mph (62.01 km/h)
35 mph (56.33 km/h)44.95 mph (72.34 km/h)
40 mph (64.37 km/h)51.37 mph (82.67 km/h)
45 mph (72.42 km/h)57.79 mph (93.01 km/h)
50 mph (80.47 km/h)64.21 mph (103.34 km/h)
55 mph (88.51 km/h)70.63 mph (113.68 km/h)
60 mph (96.56 km/h)77.06 mph (124.01 km/h)
65 mph (104.61 km/h)83.48 mph (134.34 km/h)
70 mph (112.65 km/h)89.9 mph (144.68 km/h)
75 mph (120.7 km/h)96.32 mph (155.01 km/h)
80 mph (128.75 km/h)102.74 mph (165.35 km/h)
85 mph (136.79 km/h)109.16 mph (175.68 km/h)
90 mph (144.84 km/h)115.58 mph (186.02 km/h)
95 mph (152.89 km/h)122.01 mph (196.35 km/h)
100 mph (160.93 km/h)128.43 mph (206.68 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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