Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/60r16 vs 215/50r17 Tire Comparison Side By Side
  205/60-16 215/50-17 Difference
Diameter inches (mm) 25.69 (652.4) 25.46 (646.8) -0.22 (-5.6) -0.9%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 80.69 (2049.58) 80 (2031.98) -0.69 (-17.59) -0.9%
Sidewall Height inches (mm) 4.84 (123) 4.23 (107.5) -0.61 (-15.5) -12.6%
Revolutions per mile (km) 785.21 (487.91) 792.01 (492.13) 6.8 (4.22) 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 (55.84 km/h)
40 mph (64.37 km/h)39.66 mph (63.82 km/h)
45 mph (72.42 km/h)44.61 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 (87.75 km/h)
60 mph (96.56 km/h)59.48 mph (95.73 km/h)
65 mph (104.61 km/h)64.44 mph (103.71 km/h)
70 mph (112.65 km/h)69.4 mph (111.69 km/h)
75 mph (120.7 km/h)74.36 mph (119.66 km/h)
80 mph (128.75 km/h)79.31 mph (127.64 km/h)
85 mph (136.79 km/h)84.27 mph (135.62 km/h)
90 mph (144.84 km/h)89.23 mph (143.6 km/h)
95 mph (152.89 km/h)94.18 mph (151.58 km/h)
100 mph (160.93 km/h)99.14 mph (159.55 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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