Is it legal to repair a steer tire?

A steer axle tire with a puncture repair in the crown area that is 3/8 inch or less in diameter can be repaired using a rubber stem and a repair unit. If the injury is larger than that or in the shoulder or sidewall, the tire can be repaired with a section repair but it cannot be returned to the steer axle.

Is there an age limit to casings?

The simple answer is no. You cannot determine the retreadability of a casing based solely on age. Air pressure maintenance, the number of repairs, and the number of retreads also play important roles, so age is just another component of the inspection criteria. Most truck tire manufacturers have at least a five-year warranty on their casings, but it’s not uncommon to see the lifespan of a well-maintained casing perform beyond that time period.

Why should I pay extra to properly repair a flat tire when plugging is so much cheaper?

Any damage on the inside of the tire cannot be detected when plugging the tire on the rim. By removing the tire from the rim, inspecting the interior, and repairing the damage with a rubber stem and a repair unit, the integrity of the tire can be restored or potential problems can be identified. Proper tire repair also protects the casing, so the tire can either be retreaded or returned for credit.

Why should I check the lug nuts 50 to 100 miles after the wheels have been installed?

When wheels are installed, the bolted joint that encompasses the stud, hub/drum, wheels, and fastener is going to flex as soon as the axle is loaded. The initial flexing results in joint settling that can cause the wheels to become loose. By checking the lug nuts after the first 50 to 100 miles of service, any joint settling that has occurred can be corrected by tightening or replacing the fasteners.

What are the red/yellow dots on a sidewall for?

A red dot applied to the sidewall of a new radial medium commercial truck tire indicates the high point of radial runout, and must be considered for optimal match mounting of the assembly. For steel wheels, align the red dot with the dimple. For aluminum wheels, align the red dot with the valve stem. Some new tires have only yellow dots and they should be mounted with the yellow dot aligned to the valve stem, on both steel and aluminum wheels. Always ignore the yellow dots on new tires that have both red and yellow dots. Red dots always override yellow dots.

Must I replace my present tires with the same size tires?

Never choose a smaller size than those that came with the vehicle. Tires should always be replaced with the same size (or approved options) as recommended by the vehicle manufacturer.

When buying just two new tires, should they be put on the front or rear?

When radial tires are used with bias or bias belted tires on the same vehicle, the radials must always be placed on the rear axle. Never mix radial and bias-ply tires on the same axle. When you select a pair of replacement tires in the same size and construction as those on the vehicle, we recommend you put them on the rear axle. A single new tire should be paired on the rear axle with the tire having the most tread depth of the other three.

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