Mike "Wuzzy121". Rest in peace, brother

Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/75r16 vs 265/70r17 Tire Comparison Side By Side
  265/75-16 265/70-17 Difference
Diameter inches (mm) 31.65 (803.9) 31.61 (802.8) -0.04 (-1.1) -0.1%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 99.43 (2525.53) 99.29 (2522.07) -0.14 (-3.46) -0.1%
Sidewall Height inches (mm) 7.82 (198.75) 7.3 (185.5) -0.52 (-13.25) -6.7%
Revolutions per mile (km) 637.23 (395.96) 638.1 (396.5) 0.87 (0.54) 0.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.97 mph (32.14 km/h)
25 mph (40.23 km/h)24.97 mph (40.18 km/h)
30 mph (48.28 km/h)29.96 mph (48.21 km/h)
35 mph (56.33 km/h)34.95 mph (56.25 km/h)
40 mph (64.37 km/h)39.95 mph (64.29 km/h)
45 mph (72.42 km/h)44.94 mph (72.32 km/h)
50 mph (80.47 km/h)49.93 mph (80.36 km/h)
55 mph (88.51 km/h)54.92 mph (88.39 km/h)
60 mph (96.56 km/h)59.92 mph (96.43 km/h)
65 mph (104.61 km/h)64.91 mph (104.46 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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