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
245/75r16 vs 265/75r16 Tire Comparison Side By Side
  245/75-16 265/75-16 Difference
Diameter inches (mm) 30.47 (773.9) 31.65 (803.9) 1.18 (30) 3.9%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 95.72 (2431.28) 99.43 (2525.53) 3.71 (94.25) 3.9%
Sidewall Height inches (mm) 7.23 (183.75) 7.82 (198.75) 0.59 (15) 8.2%
Revolutions per mile (km) 661.93 (411.31) 637.23 (395.96) -24.7 (-15.35) -3.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.78 mph (33.43 km/h)
25 mph (40.23 km/h)25.97 mph (41.79 km/h)
30 mph (48.28 km/h)31.16 mph (50.15 km/h)
35 mph (56.33 km/h)36.36 mph (58.51 km/h)
40 mph (64.37 km/h)41.55 mph (66.87 km/h)
45 mph (72.42 km/h)46.74 mph (75.23 km/h)
50 mph (80.47 km/h)51.94 mph (83.59 km/h)
55 mph (88.51 km/h)57.13 mph (91.95 km/h)
60 mph (96.56 km/h)62.33 mph (100.3 km/h)
65 mph (104.61 km/h)67.52 mph (108.66 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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