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 245/75r16 Tire Comparison Side By Side
  265/75-16 245/75-16 Difference
Diameter inches (mm) 31.65 (803.9) 30.47 (773.9) -1.18 (-30) -3.7%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 99.43 (2525.53) 95.72 (2431.28) -3.71 (-94.25) -3.7%
Sidewall Height inches (mm) 7.82 (198.75) 7.23 (183.75) -0.59 (-15) -7.5%
Revolutions per mile (km) 637.23 (395.96) 661.93 (411.31) 24.7 (15.35) 3.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.25 mph (30.99 km/h)
25 mph (40.23 km/h)24.07 mph (38.73 km/h)
30 mph (48.28 km/h)28.88 mph (46.48 km/h)
35 mph (56.33 km/h)33.69 mph (54.23 km/h)
40 mph (64.37 km/h)38.51 mph (61.97 km/h)
45 mph (72.42 km/h)43.32 mph (69.72 km/h)
50 mph (80.47 km/h)48.13 mph (77.46 km/h)
55 mph (88.51 km/h)52.95 mph (85.21 km/h)
60 mph (96.56 km/h)57.76 mph (92.96 km/h)
65 mph (104.61 km/h)62.57 mph (100.7 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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