Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/70r16 vs 195/65r15 Tire Comparison Side By Side
  215/70-16 195/65-15 Difference
Diameter inches (mm) 27.85 (707.4) 24.98 (634.5) -2.87 (-72.9) -10.3%
Width inches (mm) 8.46 (215) 7.68 (195) -0.79 (-20) -9.3%
Circum. inches (mm) 87.49 (2222.36) 78.48 (1993.34) -9.02 (-229.02) -10.3%
Sidewall Height inches (mm) 5.93 (150.5) 4.99 (126.75) -0.94 (-23.75) -15.8%
Revolutions per mile (km) 724.16 (449.97) 807.36 (501.67) 83.2 (51.7) 11.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.94 mph (28.87 km/h)
25 mph (40.23 km/h)22.42 mph (36.09 km/h)
30 mph (48.28 km/h)26.91 mph (43.3 km/h)
35 mph (56.33 km/h)31.39 mph (50.52 km/h)
40 mph (64.37 km/h)35.88 mph (57.74 km/h)
45 mph (72.42 km/h)40.36 mph (64.96 km/h)
50 mph (80.47 km/h)44.85 mph (72.17 km/h)
55 mph (88.51 km/h)49.33 mph (79.39 km/h)
60 mph (96.56 km/h)53.82 mph (86.61 km/h)
65 mph (104.61 km/h)58.3 mph (93.83 km/h)
70 mph (112.65 km/h)62.79 mph (101.04 km/h)
75 mph (120.7 km/h)67.27 mph (108.26 km/h)
80 mph (128.75 km/h)71.76 mph (115.48 km/h)
85 mph (136.79 km/h)76.24 mph (122.7 km/h)
90 mph (144.84 km/h)80.73 mph (129.91 km/h)
95 mph (152.89 km/h)85.21 mph (137.13 km/h)
100 mph (160.93 km/h)89.69 mph (144.35 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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