Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/65r16 vs 265/70r17 Tire Comparison Side By Side
  245/65-16 265/70-17 Difference
Diameter inches (mm) 28.54 (724.9) 31.61 (802.8) 3.07 (77.9) 10.7%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 89.66 (2277.34) 99.29 (2522.07) 9.64 (244.73) 10.7%
Sidewall Height inches (mm) 6.27 (159.25) 7.3 (185.5) 1.03 (26.25) 16.5%
Revolutions per mile (km) 706.68 (439.11) 638.1 (396.5) -68.57 (-42.61) -9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.15 mph (35.65 km/h)
25 mph (40.23 km/h)27.69 mph (44.56 km/h)
30 mph (48.28 km/h)33.22 mph (53.47 km/h)
35 mph (56.33 km/h)38.76 mph (62.38 km/h)
40 mph (64.37 km/h)44.3 mph (71.29 km/h)
45 mph (72.42 km/h)49.84 mph (80.2 km/h)
50 mph (80.47 km/h)55.37 mph (89.11 km/h)
55 mph (88.51 km/h)60.91 mph (98.03 km/h)
60 mph (96.56 km/h)66.45 mph (106.94 km/h)
65 mph (104.61 km/h)71.99 mph (115.85 km/h)
70 mph (112.65 km/h)77.52 mph (124.76 km/h)
75 mph (120.7 km/h)83.06 mph (133.67 km/h)
80 mph (128.75 km/h)88.6 mph (142.58 km/h)
85 mph (136.79 km/h)94.13 mph (151.49 km/h)
90 mph (144.84 km/h)99.67 mph (160.41 km/h)
95 mph (152.89 km/h)105.21 mph (169.32 km/h)
100 mph (160.93 km/h)110.75 mph (178.23 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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