M66 Tour King

Features a directional tread pattern for better wet conditions.

Directional arrow is located on the side walls for easier directional mounting.

Features a balancing dot that is aligned with the valve stem to make balancing easier.

6 ply rating to increase carrying capacity

Intermediate tread compound for good mileage and great traction on all road conditions.

Advanced pattern prevent wobble in rain grooves.

H-Speed Rated

M66 Touring Fronts

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80-90-21 $75
alpha numeric method size system MH90

100-90-19 $77
alpha numeric method size system MM90

130-90-16 $85
alpha numeric method size system MT90
 

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M66 Touring Rear

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130-90-16 $86
alpha numeric method size system MT90

140-90-15 $93
alpha numeric method size system MU90

140-90-16 $95
alpha numeric method size system MU90

150-80-16 $95
alpha numeric method size system MV85

150-90-15 $95
alpha numeric method size system MV85

170-80-15 $104

Tire size

First off, there's those big numbers and letters that may read something like 130/90 16, or MT90 16. These numbers indicate the size of the tire, and the rim it's designed to go on. In this case, these are both the same size tires.

How can we tell?

Let's start with the first series of numbers, 130/90 16, otherwise known as the metric designation. This is the most popular nomenclature today and it's practically a standard in the automotive world.

The 130 designates the tire's width in millimeters, measured in a straight line through the tire from one edge of the tire's tread to the other. The second number, 90, is a bit trickier to understand. This represents the aspect ratio between the tire's width and its height, or how tall a tire is in relationship to its width. Simply put, the higher this number is, the taller the tire will be. In this case, the tire is 90 percent as tall as its width, or 117mm.

The last number, 16, is the tire's rim diameter expressed in inches.

The width on some tires may be expressed in inches as well, but usually the aspect ratio is left off.

The other series of numbers and letters, MT90 16, represents the same tire size, but it's expressed in an alphabetical code. M means the tire is designated for motorcycle use, T is the tire width code, 90 is the aspect ratio and 16 is the rim diameter.

Size conversion chart
Front tires Rear tires
Metric Alphanumeric Metric Alphanumeric
80/90 MH90 110/90 MN90
90/90 MJ90 120/80 MP85
100/90 MM90 120/90 MP85
110/90 MN90 130/90 MT90
120/90 MR90 140/90 MU90
130/90 MT90 150/80 MV85
    150/90 MV85

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