Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/60r16 vs 215/70r16 Tire Comparison Side By Side
  235/60-16 215/70-16 Difference
Diameter inches (mm) 27.1 (688.4) 27.85 (707.4) 0.75 (19) 2.8%
Width inches (mm) 9.25 (235) 8.46 (215) -0.79 (-20) -8.5%
Circum. inches (mm) 85.14 (2162.67) 87.49 (2222.36) 2.35 (59.69) 2.8%
Sidewall Height inches (mm) 5.55 (141) 5.93 (150.5) 0.37 (9.5) 6.7%
Revolutions per mile (km) 744.15 (462.39) 724.16 (449.97) -19.99 (-12.42) -2.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.55 mph (33.08 km/h)
25 mph (40.23 km/h)25.69 mph (41.34 km/h)
30 mph (48.28 km/h)30.83 mph (49.61 km/h)
35 mph (56.33 km/h)35.97 mph (57.88 km/h)
40 mph (64.37 km/h)41.1 mph (66.15 km/h)
45 mph (72.42 km/h)46.24 mph (74.42 km/h)
50 mph (80.47 km/h)51.38 mph (82.69 km/h)
55 mph (88.51 km/h)56.52 mph (90.96 km/h)
60 mph (96.56 km/h)61.66 mph (99.23 km/h)
65 mph (104.61 km/h)66.79 mph (107.49 km/h)
70 mph (112.65 km/h)71.93 mph (115.76 km/h)
75 mph (120.7 km/h)77.07 mph (124.03 km/h)
80 mph (128.75 km/h)82.21 mph (132.3 km/h)
85 mph (136.79 km/h)87.35 mph (140.57 km/h)
90 mph (144.84 km/h)92.48 mph (148.84 km/h)
95 mph (152.89 km/h)97.62 mph (157.11 km/h)
100 mph (160.93 km/h)102.76 mph (165.38 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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