Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
250/60r25 vs 250/60r16 Tire Comparison Side By Side
  250/60-25 250/60-16 Difference
Diameter inches (mm) 36.81 (935) 27.81 (706.4) -9 (-228.6) -24.4%
Width inches (mm) 9.84 (250) 9.84 (250) 0 (0) 0%
Circum. inches (mm) 115.65 (2937.39) 87.37 (2219.22) -28.27 (-718.17) -24.4%
Sidewall Height inches (mm) 5.91 (150) 5.91 (150) 0 (0) 0%
Revolutions per mile (km) 547.88 (340.44) 725.18 (450.61) 177.3 (110.17) 32.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)15.11 mph (24.32 km/h)
25 mph (40.23 km/h)18.89 mph (30.4 km/h)
30 mph (48.28 km/h)22.67 mph (36.48 km/h)
35 mph (56.33 km/h)26.44 mph (42.56 km/h)
40 mph (64.37 km/h)30.22 mph (48.63 km/h)
45 mph (72.42 km/h)34 mph (54.71 km/h)
50 mph (80.47 km/h)37.78 mph (60.79 km/h)
55 mph (88.51 km/h)41.55 mph (66.87 km/h)
60 mph (96.56 km/h)45.33 mph (72.95 km/h)
65 mph (104.61 km/h)49.11 mph (79.03 km/h)
70 mph (112.65 km/h)52.89 mph (85.11 km/h)
75 mph (120.7 km/h)56.66 mph (91.19 km/h)
80 mph (128.75 km/h)60.44 mph (97.27 km/h)
85 mph (136.79 km/h)64.22 mph (103.35 km/h)
90 mph (144.84 km/h)68 mph (109.43 km/h)
95 mph (152.89 km/h)71.77 mph (115.51 km/h)
100 mph (160.93 km/h)75.55 mph (121.59 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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