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 265/70r16 Tire Comparison Side By Side
  245/75-16 265/70-16 Difference
Diameter inches (mm) 30.47 (773.9) 30.61 (777.4) 0.14 (3.5) 0.5%
Width inches (mm) 9.65 (245) 10.43 (265) 0.79 (20) 8.2%
Circum. inches (mm) 95.72 (2431.28) 96.15 (2442.27) 0.43 (11) 0.5%
Sidewall Height inches (mm) 7.23 (183.75) 7.3 (185.5) 0.07 (1.75) 1%
Revolutions per mile (km) 661.93 (411.31) 658.95 (409.45) -2.98 (-1.85) -0.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.09 mph (32.33 km/h)
25 mph (40.23 km/h)25.11 mph (40.42 km/h)
30 mph (48.28 km/h)30.14 mph (48.5 km/h)
35 mph (56.33 km/h)35.16 mph (56.58 km/h)
40 mph (64.37 km/h)40.18 mph (64.67 km/h)
45 mph (72.42 km/h)45.2 mph (72.75 km/h)
50 mph (80.47 km/h)50.23 mph (80.83 km/h)
55 mph (88.51 km/h)55.25 mph (88.91 km/h)
60 mph (96.56 km/h)60.27 mph (97 km/h)
65 mph (104.61 km/h)65.29 mph (105.08 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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