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
265/70r17 vs 275/70r17 Tire Comparison Side By Side
  265/70-17 275/70-17 Difference
Diameter inches (mm) 31.61 (802.8) 32.16 (816.8) 0.55 (14) 1.7%
Width inches (mm) 10.43 (265) 10.83 (275) 0.39 (10) 3.8%
Circum. inches (mm) 99.29 (2522.07) 101.03 (2566.05) 1.73 (43.98) 1.7%
Sidewall Height inches (mm) 7.3 (185.5) 7.58 (192.5) 0.28 (7) 3.8%
Revolutions per mile (km) 638.1 (396.5) 627.17 (389.7) -10.94 (-6.8) -1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.35 mph (32.75 km/h)
25 mph (40.23 km/h)25.44 mph (40.94 km/h)
30 mph (48.28 km/h)30.52 mph (49.12 km/h)
35 mph (56.33 km/h)35.61 mph (57.31 km/h)
40 mph (64.37 km/h)40.7 mph (65.5 km/h)
45 mph (72.42 km/h)45.78 mph (73.68 km/h)
50 mph (80.47 km/h)50.87 mph (81.87 km/h)
55 mph (88.51 km/h)55.96 mph (90.06 km/h)
60 mph (96.56 km/h)61.05 mph (98.24 km/h)
65 mph (104.61 km/h)66.13 mph (106.43 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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