Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/80r16 vs 215/75r16 Tire Comparison Side By Side
  205/80-16 215/75-16 Difference
Diameter inches (mm) 28.91 (734.4) 28.7 (728.9) -0.22 (-5.5) -0.7%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 90.83 (2307.19) 90.15 (2289.91) -0.68 (-17.28) -0.7%
Sidewall Height inches (mm) 6.46 (164) 6.35 (161.25) -0.11 (-2.75) -1.7%
Revolutions per mile (km) 697.54 (433.43) 702.8 (436.7) 5.26 (3.27) 0.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.85 mph (31.95 km/h)
25 mph (40.23 km/h)24.81 mph (39.93 km/h)
30 mph (48.28 km/h)29.78 mph (47.92 km/h)
35 mph (56.33 km/h)34.74 mph (55.91 km/h)
40 mph (64.37 km/h)39.7 mph (63.89 km/h)
45 mph (72.42 km/h)44.66 mph (71.88 km/h)
50 mph (80.47 km/h)49.63 mph (79.86 km/h)
55 mph (88.51 km/h)54.59 mph (87.85 km/h)
60 mph (96.56 km/h)59.55 mph (95.84 km/h)
65 mph (104.61 km/h)64.51 mph (103.82 km/h)
70 mph (112.65 km/h)69.48 mph (111.81 km/h)
75 mph (120.7 km/h)74.44 mph (119.8 km/h)
80 mph (128.75 km/h)79.4 mph (127.78 km/h)
85 mph (136.79 km/h)84.36 mph (135.77 km/h)
90 mph (144.84 km/h)89.33 mph (143.76 km/h)
95 mph (152.89 km/h)94.29 mph (151.74 km/h)
100 mph (160.93 km/h)99.25 mph (159.73 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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