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 265/55r10 Tire Comparison Side By Side
  255/40-10 265/55-10 Difference
Diameter inches (mm) 18.03 (458) 21.48 (545.5) 3.44 (87.5) 19.1%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 56.65 (1438.85) 67.47 (1713.74) 10.82 (274.89) 19.1%
Sidewall Height inches (mm) 4.02 (102) 5.74 (145.75) 1.72 (43.75) 42.9%
Revolutions per mile (km) 1118.49 (695) 939.08 (583.52) -179.41 (-111.48) -16%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.82 mph (38.34 km/h)
25 mph (40.23 km/h)29.78 mph (47.92 km/h)
30 mph (48.28 km/h)35.73 mph (57.5 km/h)
35 mph (56.33 km/h)41.69 mph (67.09 km/h)
40 mph (64.37 km/h)47.64 mph (76.67 km/h)
45 mph (72.42 km/h)53.6 mph (86.26 km/h)
50 mph (80.47 km/h)59.55 mph (95.84 km/h)
55 mph (88.51 km/h)65.51 mph (105.42 km/h)
60 mph (96.56 km/h)71.46 mph (115.01 km/h)
65 mph (104.61 km/h)77.42 mph (124.59 km/h)
70 mph (112.65 km/h)83.37 mph (134.18 km/h)
75 mph (120.7 km/h)89.33 mph (143.76 km/h)
80 mph (128.75 km/h)95.28 mph (153.34 km/h)
85 mph (136.79 km/h)101.24 mph (162.93 km/h)
90 mph (144.84 km/h)107.19 mph (172.51 km/h)
95 mph (152.89 km/h)113.15 mph (182.1 km/h)
100 mph (160.93 km/h)119.1 mph (191.68 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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