Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/65r17 vs 225/75r16 Tire Comparison Side By Side
  245/65-17 225/75-16 Difference
Diameter inches (mm) 29.54 (750.3) 29.29 (743.9) -0.25 (-6.4) -0.9%
Width inches (mm) 9.65 (245) 8.86 (225) -0.79 (-20) -8.2%
Circum. inches (mm) 92.8 (2357.14) 92.01 (2337.03) -0.79 (-20.11) -0.9%
Sidewall Height inches (mm) 6.27 (159.25) 6.64 (168.75) 0.37 (9.5) 6%
Revolutions per mile (km) 682.75 (424.24) 688.63 (427.89) 5.87 (3.65) 0.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.83 mph (31.91 km/h)
25 mph (40.23 km/h)24.79 mph (39.89 km/h)
30 mph (48.28 km/h)29.74 mph (47.87 km/h)
35 mph (56.33 km/h)34.7 mph (55.85 km/h)
40 mph (64.37 km/h)39.66 mph (63.82 km/h)
45 mph (72.42 km/h)44.62 mph (71.8 km/h)
50 mph (80.47 km/h)49.57 mph (79.78 km/h)
55 mph (88.51 km/h)54.53 mph (87.76 km/h)
60 mph (96.56 km/h)59.49 mph (95.74 km/h)
65 mph (104.61 km/h)64.45 mph (103.72 km/h)
70 mph (112.65 km/h)69.4 mph (111.69 km/h)
75 mph (120.7 km/h)74.36 mph (119.67 km/h)
80 mph (128.75 km/h)79.32 mph (127.65 km/h)
85 mph (136.79 km/h)84.27 mph (135.63 km/h)
90 mph (144.84 km/h)89.23 mph (143.61 km/h)
95 mph (152.89 km/h)94.19 mph (151.58 km/h)
100 mph (160.93 km/h)99.15 mph (159.56 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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