Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r16 vs 317/70r17 Tire Comparison Side By Side
  265/70-16 317/70-17 Difference
Diameter inches (mm) 30.61 (777.4) 34.47 (875.6) 3.87 (98.2) 12.6%
Width inches (mm) 10.43 (265) 12.48 (317) 2.05 (52) 19.6%
Circum. inches (mm) 96.15 (2442.27) 108.3 (2750.78) 12.15 (308.5) 12.6%
Sidewall Height inches (mm) 7.3 (185.5) 8.74 (221.9) 1.43 (36.4) 19.6%
Revolutions per mile (km) 658.95 (409.45) 585.05 (363.53) -73.9 (-45.92) -11.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.53 mph (36.25 km/h)
25 mph (40.23 km/h)28.16 mph (45.32 km/h)
30 mph (48.28 km/h)33.79 mph (54.38 km/h)
35 mph (56.33 km/h)39.42 mph (63.44 km/h)
40 mph (64.37 km/h)45.05 mph (72.51 km/h)
45 mph (72.42 km/h)50.68 mph (81.57 km/h)
50 mph (80.47 km/h)56.32 mph (90.63 km/h)
55 mph (88.51 km/h)61.95 mph (99.7 km/h)
60 mph (96.56 km/h)67.58 mph (108.76 km/h)
65 mph (104.61 km/h)73.21 mph (117.82 km/h)
70 mph (112.65 km/h)78.84 mph (126.88 km/h)
75 mph (120.7 km/h)84.47 mph (135.95 km/h)
80 mph (128.75 km/h)90.11 mph (145.01 km/h)
85 mph (136.79 km/h)95.74 mph (154.07 km/h)
90 mph (144.84 km/h)101.37 mph (163.14 km/h)
95 mph (152.89 km/h)107 mph (172.2 km/h)
100 mph (160.93 km/h)112.63 mph (181.26 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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