Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/90r15 vs 135/35r15 Tire Comparison Side By Side
  135/90-15 135/35-15 Difference
Diameter inches (mm) 24.57 (624) 18.72 (475.5) -5.85 (-148.5) -23.8%
Width inches (mm) 5.31 (135) 5.31 (135) 0 (0) 0%
Circum. inches (mm) 77.18 (1960.35) 58.81 (1493.83) -18.37 (-466.53) -23.8%
Sidewall Height inches (mm) 4.78 (121.5) 1.86 (47.25) -2.92 (-74.25) -61.1%
Revolutions per mile (km) 820.95 (510.11) 1077.33 (669.42) 256.38 (159.31) 31.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)15.24 mph (24.53 km/h)
25 mph (40.23 km/h)19.05 mph (30.66 km/h)
30 mph (48.28 km/h)22.86 mph (36.79 km/h)
35 mph (56.33 km/h)26.67 mph (42.92 km/h)
40 mph (64.37 km/h)30.48 mph (49.05 km/h)
45 mph (72.42 km/h)34.29 mph (55.19 km/h)
50 mph (80.47 km/h)38.1 mph (61.32 km/h)
55 mph (88.51 km/h)41.91 mph (67.45 km/h)
60 mph (96.56 km/h)45.72 mph (73.58 km/h)
65 mph (104.61 km/h)49.53 mph (79.71 km/h)
70 mph (112.65 km/h)53.34 mph (85.84 km/h)
75 mph (120.7 km/h)57.15 mph (91.98 km/h)
80 mph (128.75 km/h)60.96 mph (98.11 km/h)
85 mph (136.79 km/h)64.77 mph (104.24 km/h)
90 mph (144.84 km/h)68.58 mph (110.37 km/h)
95 mph (152.89 km/h)72.39 mph (116.5 km/h)
100 mph (160.93 km/h)76.2 mph (122.64 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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