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 215/60r16 Tire Comparison Side By Side
  215/85-14 215/60-16 Difference
Diameter inches (mm) 28.39 (721.1) 26.16 (664.4) -2.23 (-56.7) -7.9%
Width inches (mm) 8.46 (215) 8.46 (215) 0 (0) 0%
Circum. inches (mm) 89.19 (2265.4) 82.18 (2087.27) -7.01 (-178.13) -7.9%
Sidewall Height inches (mm) 7.19 (182.75) 5.08 (129) -2.12 (-53.75) -29.4%
Revolutions per mile (km) 710.4 (441.42) 771.03 (479.09) 60.63 (37.67) 8.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.43 mph (29.66 km/h)
25 mph (40.23 km/h)23.03 mph (37.07 km/h)
30 mph (48.28 km/h)27.64 mph (44.48 km/h)
35 mph (56.33 km/h)32.25 mph (51.9 km/h)
40 mph (64.37 km/h)36.85 mph (59.31 km/h)
45 mph (72.42 km/h)41.46 mph (66.73 km/h)
50 mph (80.47 km/h)46.07 mph (74.14 km/h)
55 mph (88.51 km/h)50.68 mph (81.55 km/h)
60 mph (96.56 km/h)55.28 mph (88.97 km/h)
65 mph (104.61 km/h)59.89 mph (96.38 km/h)
70 mph (112.65 km/h)64.5 mph (103.8 km/h)
75 mph (120.7 km/h)69.1 mph (111.21 km/h)
80 mph (128.75 km/h)73.71 mph (118.62 km/h)
85 mph (136.79 km/h)78.32 mph (126.04 km/h)
90 mph (144.84 km/h)82.92 mph (133.45 km/h)
95 mph (152.89 km/h)87.53 mph (140.87 km/h)
100 mph (160.93 km/h)92.14 mph (148.28 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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