Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r16 vs 215/95r17 Tire Comparison Side By Side
  135/80-16 215/95-17 Difference
Diameter inches (mm) 24.5 (622.4) 33.08 (840.3) 8.58 (217.9) 35%
Width inches (mm) 5.31 (135) 8.46 (215) 3.15 (80) 59.3%
Circum. inches (mm) 76.98 (1955.33) 103.93 (2639.88) 26.95 (684.55) 35%
Sidewall Height inches (mm) 4.25 (108) 8.04 (204.25) 3.79 (96.25) 89.1%
Revolutions per mile (km) 823.06 (511.42) 609.63 (378.8) -213.43 (-132.62) -25.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)27 mph (43.46 km/h)
25 mph (40.23 km/h)33.75 mph (54.32 km/h)
30 mph (48.28 km/h)40.5 mph (65.18 km/h)
35 mph (56.33 km/h)47.25 mph (76.05 km/h)
40 mph (64.37 km/h)54 mph (86.91 km/h)
45 mph (72.42 km/h)60.75 mph (97.77 km/h)
50 mph (80.47 km/h)67.5 mph (108.64 km/h)
55 mph (88.51 km/h)74.26 mph (119.5 km/h)
60 mph (96.56 km/h)81.01 mph (130.37 km/h)
65 mph (104.61 km/h)87.76 mph (141.23 km/h)
70 mph (112.65 km/h)94.51 mph (152.09 km/h)
75 mph (120.7 km/h)101.26 mph (162.96 km/h)
80 mph (128.75 km/h)108.01 mph (173.82 km/h)
85 mph (136.79 km/h)114.76 mph (184.69 km/h)
90 mph (144.84 km/h)121.51 mph (195.55 km/h)
95 mph (152.89 km/h)128.26 mph (206.41 km/h)
100 mph (160.93 km/h)135.01 mph (217.28 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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