Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/60r17 vs 265/70r17 Tire Comparison Side By Side
  245/60-17 265/70-17 Difference
Diameter inches (mm) 28.57 (725.8) 31.61 (802.8) 3.03 (77) 10.6%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 89.77 (2280.17) 99.29 (2522.07) 9.52 (241.9) 10.6%
Sidewall Height inches (mm) 5.79 (147) 7.3 (185.5) 1.52 (38.5) 26.2%
Revolutions per mile (km) 705.8 (438.56) 638.1 (396.5) -67.7 (-42.06) -9.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.12 mph (35.6 km/h)
25 mph (40.23 km/h)27.65 mph (44.5 km/h)
30 mph (48.28 km/h)33.18 mph (53.4 km/h)
35 mph (56.33 km/h)38.71 mph (62.3 km/h)
40 mph (64.37 km/h)44.24 mph (71.2 km/h)
45 mph (72.42 km/h)49.77 mph (80.1 km/h)
50 mph (80.47 km/h)55.3 mph (89 km/h)
55 mph (88.51 km/h)60.83 mph (97.9 km/h)
60 mph (96.56 km/h)66.37 mph (106.8 km/h)
65 mph (104.61 km/h)71.9 mph (115.71 km/h)
70 mph (112.65 km/h)77.43 mph (124.61 km/h)
75 mph (120.7 km/h)82.96 mph (133.51 km/h)
80 mph (128.75 km/h)88.49 mph (142.41 km/h)
85 mph (136.79 km/h)94.02 mph (151.31 km/h)
90 mph (144.84 km/h)99.55 mph (160.21 km/h)
95 mph (152.89 km/h)105.08 mph (169.11 km/h)
100 mph (160.93 km/h)110.61 mph (178.01 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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