Scooter Parts – Making Sense of Motor Scooter Tire Sizes

Choosing the best scooter components can usually be a difficult course of for the first-time motor scooter proprietor. Of all of the components for scooter restore or substitute, few are as initially complicated as figuring out the right scooter tire measurement to your rims. Nonetheless, when you be taught the ‘secret code’ of tire sizing, you shouldn’t have any bother choosing the best rubber to your street-legal machine.

Many of the confusion is because of two totally different methods in use concurrently; the older inch-pattern, and the newer, hybrid millimeter/inch system. A basic instance of an inch-pattern scooter tire measurement is the three.50-10. These are nonetheless quite common on classic Italian scooters, their trendy clones and look-alikes. Merely learn Three.50-10 because the inch measurement of the scooter’s rim; on this case, Three-1/2 inches by 10 inches. Different common inch-pattern sizes are Three.00-10 and three.5-Eight.

The newer hybrid millimeter/inch coding is the place it turns into a bit sophisticated. This can at all times learn as three units of numerals separated by a slash (the millimeters) and a hyphen (the inches). A typical instance is the widespread measurement 120/70-10. The numbers earlier than the slash (on this case 120) designates the width of the tire in millimeters when mounted and inflated. These two or three digits will vary from about 80 to 160.

The 2 digits following the slash are known as the Side Ratio, normally between 50 and 90, and are learn as a share. Multiply the width (the quantity earlier than the slash mark) by the facet ratio quantity, and the end result offers the tire’s top between the rim bead and the tread. For instance, multiplying 120 x.70 exhibits this tire has a top of 84 mm. The quantity following the hyphen represents the inch measurement of the rim diameter.

Thus a 120/70-10 tire can be 120mm extensive, 84mm from tread to rim, and 10 inches from high to backside of the rim. Shopping for one of the best rubber scooter components turns into actually easy whenever you be taught to learn the code.

Most of the early scooters from the 1950s and ’60s, and plenty of of at the moment’s retro-styled fashions, sported entrance and rear rims of the identical measurement. Often in an Eight or 10 inch diameter, these had been the basic ‘little wheels’ of the Golden Age of scooterdom. Sharing an attribute with their bigger bike siblings, many modern scooters require a wider and even bigger diameter tire on the rear wheel than on the entrance. That is most frequently the case with scooters bearing bigger displacement engines; the 50 and 125cc powerplants of yesterday simply did not require the identical quantity of rubber on the blacktop to make sure gyroscopic stability as at the moment’s 250cc maxi-scooters.

Most main scooter tire producers reminiscent of Kenda and Michelin have fitment charts on their web sites. Making issues easy as attainable for the scooter proprietor; you possibly can simply seek for your scooter’s make and mannequin, after which see simply what rubber is made for it. Choosing the best rubber components for scooter rims has by no means been so painless.

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