Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/75r15 vs 215/85r16 Tire Comparison Side By Side
  205/75-15 215/85-16 Difference
Diameter inches (mm) 27.11 (688.5) 30.39 (771.9) 3.28 (83.4) 12.1%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 85.16 (2162.99) 95.47 (2425) 10.32 (262.01) 12.1%
Sidewall Height inches (mm) 6.05 (153.75) 7.19 (182.75) 1.14 (29) 18.9%
Revolutions per mile (km) 744.04 (462.32) 663.65 (412.37) -80.39 (-49.95) -10.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.42 mph (36.09 km/h)
25 mph (40.23 km/h)28.03 mph (45.11 km/h)
30 mph (48.28 km/h)33.63 mph (54.13 km/h)
35 mph (56.33 km/h)39.24 mph (63.15 km/h)
40 mph (64.37 km/h)44.85 mph (72.17 km/h)
45 mph (72.42 km/h)50.45 mph (81.19 km/h)
50 mph (80.47 km/h)56.06 mph (90.21 km/h)
55 mph (88.51 km/h)61.66 mph (99.24 km/h)
60 mph (96.56 km/h)67.27 mph (108.26 km/h)
65 mph (104.61 km/h)72.87 mph (117.28 km/h)
70 mph (112.65 km/h)78.48 mph (126.3 km/h)
75 mph (120.7 km/h)84.08 mph (135.32 km/h)
80 mph (128.75 km/h)89.69 mph (144.34 km/h)
85 mph (136.79 km/h)95.3 mph (153.36 km/h)
90 mph (144.84 km/h)100.9 mph (162.39 km/h)
95 mph (152.89 km/h)106.51 mph (171.41 km/h)
100 mph (160.93 km/h)112.11 mph (180.43 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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