Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
226/60r16 vs 225/65r15 Tire Comparison Side By Side
  226/60-16 225/65-15 Difference
Diameter inches (mm) 26.68 (677.6) 26.52 (673.5) -0.16 (-4.1) -0.6%
Width inches (mm) 8.9 (226) 8.86 (225) -0.04 (-1) -0.4%
Circum. inches (mm) 83.81 (2128.74) 83.3 (2115.86) -0.51 (-12.88) -0.6%
Sidewall Height inches (mm) 5.34 (135.6) 5.76 (146.25) 0.42 (10.65) 7.9%
Revolutions per mile (km) 756.01 (469.76) 760.61 (472.62) 4.6 (2.86) 0.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.88 mph (31.99 km/h)
25 mph (40.23 km/h)24.85 mph (39.99 km/h)
30 mph (48.28 km/h)29.82 mph (47.99 km/h)
35 mph (56.33 km/h)34.79 mph (55.99 km/h)
40 mph (64.37 km/h)39.76 mph (63.98 km/h)
45 mph (72.42 km/h)44.73 mph (71.98 km/h)
50 mph (80.47 km/h)49.7 mph (79.98 km/h)
55 mph (88.51 km/h)54.67 mph (87.98 km/h)
60 mph (96.56 km/h)59.64 mph (95.98 km/h)
65 mph (104.61 km/h)64.61 mph (103.97 km/h)
70 mph (112.65 km/h)69.58 mph (111.97 km/h)
75 mph (120.7 km/h)74.55 mph (119.97 km/h)
80 mph (128.75 km/h)79.52 mph (127.97 km/h)
85 mph (136.79 km/h)84.49 mph (135.97 km/h)
90 mph (144.84 km/h)89.46 mph (143.96 km/h)
95 mph (152.89 km/h)94.43 mph (151.96 km/h)
100 mph (160.93 km/h)99.39 mph (159.96 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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