Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
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100/80r10 vs 110/70r12 Tire Comparison Side By Side
  100/80-10 110/70-12 Difference
Diameter inches (mm) 16.3 (414) 18.06 (458.8) 1.76 (44.8) 10.8%
Width inches (mm) 3.94 (100) 4.33 (110) 0.39 (10) 10%
Circum. inches (mm) 51.21 (1300.62) 56.75 (1441.36) 5.54 (140.74) 10.8%
Sidewall Height inches (mm) 3.15 (80) 3.03 (77) -0.12 (-3) -3.8%
Revolutions per mile (km) 1237.37 (768.86) 1116.54 (693.79) -120.82 (-75.08) -9.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.16 mph (35.67 km/h)
25 mph (40.23 km/h)27.71 mph (44.59 km/h)
30 mph (48.28 km/h)33.25 mph (53.5 km/h)
35 mph (56.33 km/h)38.79 mph (62.42 km/h)
40 mph (64.37 km/h)44.33 mph (71.34 km/h)
45 mph (72.42 km/h)49.87 mph (80.26 km/h)
50 mph (80.47 km/h)55.41 mph (89.17 km/h)
55 mph (88.51 km/h)60.95 mph (98.09 km/h)
60 mph (96.56 km/h)66.49 mph (107.01 km/h)
65 mph (104.61 km/h)72.03 mph (115.93 km/h)
70 mph (112.65 km/h)77.57 mph (124.84 km/h)
75 mph (120.7 km/h)83.12 mph (133.76 km/h)
80 mph (128.75 km/h)88.66 mph (142.68 km/h)
85 mph (136.79 km/h)94.2 mph (151.6 km/h)
90 mph (144.84 km/h)99.74 mph (160.51 km/h)
95 mph (152.89 km/h)105.28 mph (169.43 km/h)
100 mph (160.93 km/h)110.82 mph (178.35 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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