How To Read Motorcycle Tires | Motorcycle Tire Codes

How To Read Motorcycle Tires | Motorcycle Tire Codes

  • 1 Nominal section width, expressed in metric, inch or alpha.

    See size chart below.
  • 2 Ratio between tire section height and nominal section width. This ratio is not indicated when section width is expressed in inches (eg. 3.50-18).
  • 3 Code for tire construction (- = Bias, R = Radial, B = Bias Belted).
  • 4 Nominal rim diameter size in inches.
  • 5 “Motorcycle” in abbreviated form. Differentiates motorcycle tires and rims from those designed for other vehicles. Not shown on all models.
  • 6 Expresses the tire’s maximum load capacity (pounds) at the pressure indicated (psi).

    See load index chart below.
  • 7 Speed symbol. Indicates the tire’s speed.

    See speed rating chart below.
  • 8 Tubeless (TL) or tubetype (TT), as applicable.
  • 9 The arrows indicated the direction of rotation of the tire according to the fitting position (front-rear); applicable for directional tires only.
  • 10 Number of plies and material.
  • 11 Abbreviation of “US Department of Transportation.” Serves to indicate that the tire conforms to the regulations issued by the US Department of Transportation. Includes the serial # for the tire, and the last 3 or 4 numbers represent the date. Example 3805 means the tire was produced in the 38th week of 2005.
  • 12 Tread Wear Indicator, as applicable
  • 13 Brand name and registered trademark.
  • 14 Type of tread pattern and/or product line.
  • 15 Indicates where the tire was produced.

Size Chart

Size may be indicated in inches, metric, or by letters (alpha). The chart shows the approximate comparison of the different size indications.

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Street Tire Size Conversion Chart

  • Inch
  • Metric
  • Alpha
  • 2.75/3.00
  • 80
  • MH
  • 3.25
  • 90
  • MJ
  • 3.50
  • 100
  • MM
  • 3.75/4.00
  • 110
  • MN/MP
  • 4.25/4.50
  • 120
  • MR
  • 5.00/5.10
  • 130
  • MT
  • 5.50
  • 140
  • MU
  • 6.00
  • 150
  • MV

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Load Index Chart

  • 47 = 386 lb.
  • 48 = 397 lb.
  • 49 = 408 lb.
  • 50 = 414 lb.
  • 51 = 430 lb.
  • 52 = 441 lb.
  • 53 = 454 lb.
  • 54 = 467 lb.
  • 55 = 481 lb.
  • 56 = 494 lb.
  • 57 = 507 lb.
  • 58 = 520 lb.
  • 59 = 536 lb.
  • 60 = 551 lb.
  • 61 = 567 lb.
  • 62 = 584 lb.
  • 63 = 600 lb.
  • 64 = 617 lb.
  • 65 = 639 lb.
  • 66 = 661 lb.
  • 67 = 677 lb.
  • 68 = 694 lb.
  • 69 = 716 lb.
  • 70 = 739 lb.
  • 71 = 761 lb.
  • 72 = 783 lb.
  • 73 = 805 lb.
  • 74 = 827 lb.
  • 75 = 853 lb.
  • 76 = 882 lb.
  • 77 = 908 lb.
  • 78 = 937 lb.
  • 79 = 963 lb.
  • 80 = 992 lb.
  • 81 = 1,019 lb.
  • 82 = 1,047 lb.
  • 83 = 1,074 lb.
  • 84 = 1,102 lb.
  • 85 = 1,135 lb.
  • 86 = 1,168 lb.
  • 87 = 1,202 lb.
  •  

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Speed Rating Chart

  • Rating
  • MPH
  • Rating
  • MPH
  • J
  • 62
  • L
  • 74
  • M
  • 81
  • P
  • 93
  • Q
  • 100
  • R
  • 106
  • S
  • 112
  • T
  • 118
  • H
  • 130
  • V/VB
  • 149
  • (V)/(VB)
  • 149+
  • W
  • 168
  • (W)
  • 168+

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