Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/85r14 vs 205/75r16 Tire Comparison Side By Side
  215/85-14 205/75-16 Difference
Diameter inches (mm) 28.39 (721.1) 28.11 (713.9) -0.28 (-7.2) -1%
Width inches (mm) 8.46 (215) 8.07 (205) -0.39 (-10) -4.7%
Circum. inches (mm) 89.19 (2265.4) 88.3 (2242.78) -0.89 (-22.62) -1%
Sidewall Height inches (mm) 7.19 (182.75) 6.05 (153.75) -1.14 (-29) -15.9%
Revolutions per mile (km) 710.4 (441.42) 717.57 (445.87) 7.16 (4.45) 1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.8 mph (31.87 km/h)
25 mph (40.23 km/h)24.75 mph (39.83 km/h)
30 mph (48.28 km/h)29.7 mph (47.8 km/h)
35 mph (56.33 km/h)34.65 mph (55.76 km/h)
40 mph (64.37 km/h)39.6 mph (63.73 km/h)
45 mph (72.42 km/h)44.55 mph (71.7 km/h)
50 mph (80.47 km/h)49.5 mph (79.66 km/h)
55 mph (88.51 km/h)54.45 mph (87.63 km/h)
60 mph (96.56 km/h)59.4 mph (95.6 km/h)
65 mph (104.61 km/h)64.35 mph (103.56 km/h)
70 mph (112.65 km/h)69.3 mph (111.53 km/h)
75 mph (120.7 km/h)74.25 mph (119.5 km/h)
80 mph (128.75 km/h)79.2 mph (127.46 km/h)
85 mph (136.79 km/h)84.15 mph (135.43 km/h)
90 mph (144.84 km/h)89.1 mph (143.4 km/h)
95 mph (152.89 km/h)94.05 mph (151.36 km/h)
100 mph (160.93 km/h)99 mph (159.33 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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