From GummyCarbs

Tire Selection

Dual Sport Tires

Best Practices

Tube Replacement

Tubes should not be reused. They should be changed when the tire is changed.

From the the Metzeler website:

When fitting new TT (tubetype) tires, new tubes have to be used. Tubes

become stretched in service. If a used tube is fitted in a new tire, it

can crease and fail due to thinning of the tube rubber.

Tubes in Radial Tires

Tubes should not be used in radial tires.

From the Metzeler website:

Can radial tires be used with tubes inserted?

No. Motorcycle radial tires have different constructions than a bias ply tire so it is not permitted.

Tubeless Valve Replacement

When mounting tubeless tires (i.e. on tubeless rims, with no tube used), always replace the valve.

From the the same Metzeler page:

When fitting

new TL (tubeless) tires, a new valve should be fitted for safety reasons. Under acceleration and braking, as well as during continuous riding at elevated speeds, the centrifugal forces acting on the valve can bend it down up to 90°. Therefore, short valves should be used. At speeds above 200 km/h, the centrifugal forces acting on the valve insert become so high, that the preload of the valve spring might not be enough to keep the valve closed. Short valve inserts have a higher preload than long ones. Even better are short inserts with a red Teflon-ring. These have further increased spring preload. Whichever type of valve insert is used, it is

very important to carefully tighten the valve cap.

Tire Mounting Orientation

It has long been said that if there's a dot on the tire sidewall, it indicates the lightest point on the tire, and that it should be positioned adjacent to the tire valve.

From a Metzeler page:

Some METZELER tires have a red dot in the tire sidewall to indicate the lightest point which should be positioned next to the valve.

Dunlop uses a yellow dot to indicate the lightest spot:

All Dunlop street tires should be installed with the yellow balance dot at the valve.

On the other hand, This article says:

If a tire does feature color dots on the sidewall, one or two dots may be used. A red dot indicates the tire's radial runout high point. A yellow dot indicates the tire's point of least weight, from a balance standpoint.

it also goes on to say:

Times change. With the advent of styled custom wheels, the valve stem location may no longer indicate the wheel's low radial runout spot. In other words, it may no longer be viable to assume that aligning a tire's red dot to the wheel's valve stem will address any potential RFV issues.


Wheel Builders

California Bay Area

Chris at Wheel Works in Hayward
From Wheel Works The - (510) 785-4396 - 1957 W Winton Ave, Hayward, CA 94545