Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/40r10 vs 70/70r10 Tire Comparison Side By Side
  255/40-10 70/70-10 Difference
Diameter inches (mm) 18.03 (458) 13.86 (352) -4.17 (-106) -23.1%
Width inches (mm) 10.04 (255) 2.76 (70) -7.28 (-185) -72.5%
Circum. inches (mm) 56.65 (1438.85) 43.54 (1105.84) -13.11 (-333.01) -23.1%
Sidewall Height inches (mm) 4.02 (102) 1.93 (49) -2.09 (-53) -52%
Revolutions per mile (km) 1118.49 (695) 1455.31 (904.29) 336.82 (209.29) 30.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)15.37 mph (24.74 km/h)
25 mph (40.23 km/h)19.21 mph (30.92 km/h)
30 mph (48.28 km/h)23.06 mph (37.11 km/h)
35 mph (56.33 km/h)26.9 mph (43.29 km/h)
40 mph (64.37 km/h)30.74 mph (49.48 km/h)
45 mph (72.42 km/h)34.59 mph (55.66 km/h)
50 mph (80.47 km/h)38.43 mph (61.84 km/h)
55 mph (88.51 km/h)42.27 mph (68.03 km/h)
60 mph (96.56 km/h)46.11 mph (74.21 km/h)
65 mph (104.61 km/h)49.96 mph (80.4 km/h)
70 mph (112.65 km/h)53.8 mph (86.58 km/h)
75 mph (120.7 km/h)57.64 mph (92.77 km/h)
80 mph (128.75 km/h)61.48 mph (98.95 km/h)
85 mph (136.79 km/h)65.33 mph (105.13 km/h)
90 mph (144.84 km/h)69.17 mph (111.32 km/h)
95 mph (152.89 km/h)73.01 mph (117.5 km/h)
100 mph (160.93 km/h)76.86 mph (123.69 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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