Directional tires will have a rotation arrow branded on the tire's sidewall. The arrow indicates the direction in which the tire should turn.
Unless they are dismounted and remounted on their wheels to accommodate use on the other side of the vehicle, directional tires are to be used on one side of the vehicle and are intended to be rotated from the front axle to the rear axle. If different tire sizes are used on the front vs. rear axle, the tires become location-specific and prohibit tire rotation unless remounted.
1. Can I reuse my Original Equipment (O.E.) TPMS sensors instead of buying new sensors when I purchase new wheels?
A vehicle's O.E. sensors can be reused with new wheels. A qualified installer will need to remove the sensors from the previous wheels and install them on the new.
The following parts will need to be replaced by your installer when reusing O.E. sensors:
Rubber grommet seal
Aluminum valve nut
Aluminum or plastic TPMS-compatible valve cap with an internal O-ring seal
Nickel-plated valve core
Various valve washers or rings where required depending on the application
Some wheels are designed to fit multiple vehicle models and will use a centering ring system to reduce the bore size to match the hubs of different vehicles. These rings help to keep the wheel precisely centered on the vehicle hub as the lug hardware is torqued down. The clamping force of the lug hardware in the lug seats is what mechanically centers and secures the wheel in place on the hub.
Installing new brake pads with used, unturned, or worn rotors can also cause warping due to the uneven overheating. Most used rotors will have irregular, grooved wear patterns on the surfaces. Mating this with the flat surface, a new brake pad will generate heat and friction only on the raised areas of the brake rotor causing those sections to heat faster than the recessed areas not touching the pads. Any brake pad transfer film from the previous set of pads can also affect the new pad's ability to bed-in properly. The residue on the rotor can quickly lead to hot spots on the surface that can result in noise, vibration, dust, and warping problems.
Sticking calipers or other components can also lead to overheating rotors and excessive wear of the brake pads.