Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/75r16 vs 215/85r16 Tire Comparison Side By Side
  215/75-16 215/85-16 Difference
Diameter inches (mm) 28.7 (728.9) 30.39 (771.9) 1.69 (43) 5.9%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 90.15 (2289.91) 95.47 (2425) 5.32 (135.09) 5.9%
Sidewall Height inches (mm) 6.35 (161.25) 7.19 (182.75) 0.85 (21.5) 13.3%
Revolutions per mile (km) 702.8 (436.7) 663.65 (412.37) -39.15 (-24.33) -5.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.18 mph (34.09 km/h)
25 mph (40.23 km/h)26.47 mph (42.61 km/h)
30 mph (48.28 km/h)31.77 mph (51.13 km/h)
35 mph (56.33 km/h)37.06 mph (59.65 km/h)
40 mph (64.37 km/h)42.36 mph (68.17 km/h)
45 mph (72.42 km/h)47.65 mph (76.69 km/h)
50 mph (80.47 km/h)52.95 mph (85.21 km/h)
55 mph (88.51 km/h)58.24 mph (93.74 km/h)
60 mph (96.56 km/h)63.54 mph (102.26 km/h)
65 mph (104.61 km/h)68.83 mph (110.78 km/h)
70 mph (112.65 km/h)74.13 mph (119.3 km/h)
75 mph (120.7 km/h)79.42 mph (127.82 km/h)
80 mph (128.75 km/h)84.72 mph (136.34 km/h)
85 mph (136.79 km/h)90.01 mph (144.86 km/h)
90 mph (144.84 km/h)95.31 mph (153.39 km/h)
95 mph (152.89 km/h)100.6 mph (161.91 km/h)
100 mph (160.93 km/h)105.9 mph (170.43 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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