Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/60r17 vs 265/70r17 Tire Comparison Side By Side
  235/60-17 265/70-17 Difference
Diameter inches (mm) 28.1 (713.8) 31.61 (802.8) 3.5 (89) 12.5%
Width inches (mm) 9.25 (235) 10.43 (265) 1.18 (30) 12.8%
Circum. inches (mm) 88.29 (2242.47) 99.29 (2522.07) 11.01 (279.6) 12.5%
Sidewall Height inches (mm) 5.55 (141) 7.3 (185.5) 1.75 (44.5) 31.6%
Revolutions per mile (km) 717.67 (445.94) 638.1 (396.5) -79.56 (-49.44) -11.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.49 mph (36.2 km/h)
25 mph (40.23 km/h)28.12 mph (45.25 km/h)
30 mph (48.28 km/h)33.74 mph (54.3 km/h)
35 mph (56.33 km/h)39.36 mph (63.35 km/h)
40 mph (64.37 km/h)44.99 mph (72.4 km/h)
45 mph (72.42 km/h)50.61 mph (81.45 km/h)
50 mph (80.47 km/h)56.23 mph (90.5 km/h)
55 mph (88.51 km/h)61.86 mph (99.55 km/h)
60 mph (96.56 km/h)67.48 mph (108.6 km/h)
65 mph (104.61 km/h)73.1 mph (117.65 km/h)
70 mph (112.65 km/h)78.73 mph (126.7 km/h)
75 mph (120.7 km/h)84.35 mph (135.75 km/h)
80 mph (128.75 km/h)89.97 mph (144.8 km/h)
85 mph (136.79 km/h)95.6 mph (153.85 km/h)
90 mph (144.84 km/h)101.22 mph (162.9 km/h)
95 mph (152.89 km/h)106.85 mph (171.95 km/h)
100 mph (160.93 km/h)112.47 mph (181 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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