Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/82r15 vs 235/95r15 Tire Comparison Side By Side
  165/82-15 235/95-15 Difference
Diameter inches (mm) 25.65 (651.6) 32.58 (827.5) 6.93 (175.9) 27%
Width inches (mm) 6.5 (165) 9.25 (235) 2.76 (70) 42.4%
Circum. inches (mm) 80.59 (2047.06) 102.35 (2599.67) 21.76 (552.61) 27%
Sidewall Height inches (mm) 5.33 (135.3) 8.79 (223.25) 3.46 (87.95) 65%
Revolutions per mile (km) 786.17 (488.5) 619.06 (384.66) -167.12 (-103.84) -21.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)25.4 mph (40.88 km/h)
25 mph (40.23 km/h)31.75 mph (51.09 km/h)
30 mph (48.28 km/h)38.1 mph (61.31 km/h)
35 mph (56.33 km/h)44.45 mph (71.53 km/h)
40 mph (64.37 km/h)50.8 mph (81.75 km/h)
45 mph (72.42 km/h)57.15 mph (91.97 km/h)
50 mph (80.47 km/h)63.5 mph (102.19 km/h)
55 mph (88.51 km/h)69.85 mph (112.41 km/h)
60 mph (96.56 km/h)76.2 mph (122.63 km/h)
65 mph (104.61 km/h)82.55 mph (132.85 km/h)
70 mph (112.65 km/h)88.9 mph (143.07 km/h)
75 mph (120.7 km/h)95.25 mph (153.28 km/h)
80 mph (128.75 km/h)101.6 mph (163.5 km/h)
85 mph (136.79 km/h)107.95 mph (173.72 km/h)
90 mph (144.84 km/h)114.3 mph (183.94 km/h)
95 mph (152.89 km/h)120.65 mph (194.16 km/h)
100 mph (160.93 km/h)127 mph (204.38 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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