The code MH90 on a motorcycle tire refers to the tire size. Specifically, MH90 is a code for the front tire, indicating that it is 80/90 metric and 2.50/2.75 inches.
The first number (80) refers to the tire’s width in millimeters, while the second number (90) refers to the tire’s aspect ratio, which is the height of the sidewall as a percentage of the tire’s width.
In the case of MH90, the aspect ratio is 90% of the tire’s width. The letter “M” in the code stands for “motorcycle.”
It is important to note that motorcycle tire codes can vary depending on the manufacturer. For example, Metzeler produces tires in sizes 80/90-21, MH90-21, and 90/90-21, which are all nominally the same size but have slightly different widths.
It is recommended to consult the motorcycle owner’s manual or a tire professional to ensure that the correct tire size is being used for a specific motorcycle model.
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