Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/70r16 vs 265/70r16 Tire Comparison Side By Side
  245/70-16 265/70-16 Difference
Diameter inches (mm) 29.5 (749.4) 30.61 (777.4) 1.1 (28) 3.7%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 92.69 (2354.31) 96.15 (2442.27) 3.46 (87.96) 3.7%
Sidewall Height inches (mm) 6.75 (171.5) 7.3 (185.5) 0.55 (14) 8.2%
Revolutions per mile (km) 683.57 (424.75) 658.95 (409.45) -24.62 (-15.3) -3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.75 mph (33.39 km/h)
25 mph (40.23 km/h)25.93 mph (41.74 km/h)
30 mph (48.28 km/h)31.12 mph (50.08 km/h)
35 mph (56.33 km/h)36.31 mph (58.43 km/h)
40 mph (64.37 km/h)41.49 mph (66.78 km/h)
45 mph (72.42 km/h)46.68 mph (75.13 km/h)
50 mph (80.47 km/h)51.87 mph (83.47 km/h)
55 mph (88.51 km/h)57.05 mph (91.82 km/h)
60 mph (96.56 km/h)62.24 mph (100.17 km/h)
65 mph (104.61 km/h)67.43 mph (108.52 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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