Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
36/12.5r16.5 vs 295/85r16 Tire Comparison Side By Side
  36/12.5-16.5 295/85-16 Difference
Diameter inches (mm) 36.03 (915.18) 35.74 (907.9) -0.29 (-7.28) -0.8%
Width inches (mm) 12.52 (318) 11.61 (295) -0.91 (-23) -7.2%
Circum. inches (mm) 113.19 (2875.12) 112.29 (2852.25) -0.9 (-22.87) -0.8%
Sidewall Height inches (mm) 9.77 (248.04) 9.87 (250.75) 0.11 (2.71) 1.1%
Revolutions per mile (km) 559.75 (347.81) 564.24 (350.6) 4.49 (2.79) 0.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.84 mph (31.93 km/h)
25 mph (40.23 km/h)24.8 mph (39.91 km/h)
30 mph (48.28 km/h)29.76 mph (47.9 km/h)
35 mph (56.33 km/h)34.72 mph (55.88 km/h)
40 mph (64.37 km/h)39.68 mph (63.86 km/h)
45 mph (72.42 km/h)44.64 mph (71.84 km/h)
50 mph (80.47 km/h)49.6 mph (79.83 km/h)
55 mph (88.51 km/h)54.56 mph (87.81 km/h)
60 mph (96.56 km/h)59.52 mph (95.79 km/h)
65 mph (104.61 km/h)64.48 mph (103.78 km/h)
70 mph (112.65 km/h)69.44 mph (111.76 km/h)
75 mph (120.7 km/h)74.4 mph (119.74 km/h)
80 mph (128.75 km/h)79.36 mph (127.72 km/h)
85 mph (136.79 km/h)84.32 mph (135.71 km/h)
90 mph (144.84 km/h)89.28 mph (143.69 km/h)
95 mph (152.89 km/h)94.24 mph (151.67 km/h)
100 mph (160.93 km/h)99.2 mph (159.65 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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