MOTORCYCLE TIRES KNOWLEDGE 

While motorcycle tires have existed for more than 100 years, their appearance has changed dramatically.
Modern motorcycles have little in common with early motorcycles that were modeled after bicycles. 
One consistent part is the tire, which has been an integral piece of the motorcycle since its inception.
Modern radial tires made by PIRELLI are high-tech and have progressed since their introduction on motorcycles of 100 years ago. 
Below you will find the various constructions that PIRELLI uses today.

SIDEWALL
MARKINGS 

The tire is the only part of the motorcycle that makes contact with the road.  That is why correct use and maintenance of your motorcycle’s tires, as well as knowledge of the tire’s characteristics, increases the lifespan of the tire, saves money and promotes safety. Always remember to ride drive safely and respect the environment.
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NAME OF PRODUCT LINE
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SIZE
180Nominal section width (mm) 55 Nominal aspect ratio ZR Structure or construction code 17 Rim diameter (inches) M/C for motorcycle use only (73W) Load and speed index code TUBELESS built in a tubeless construction RADIAL tire construction type
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ABBREVIATION OF DEPARTMENT OF TRANSPORTATION
Abbreviation for “Department of Transportation”. Serves to indicate that the tire conforms to the regulations issued by the tire regulatory agencies of USA and Canada
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HOMOLOGATION NUMBER
This information is relevant only for the European market
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DIRECTION OF ROTATION
The arrows indicate the direction of rotation of the tire according to the fitting position (front - rear)
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DOT TIN (Tire Identification Number)
This identifies the manufacturing plant and date of production for the tire, with the last 4 digits representing the week and year. Example: 1215 indicates the 12th week of 2015
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MANUFACTURER NAME
Brand name and registered trademark