14 • Important: Always read and follow the operating instructions.
Performance, Custom,
and Aluminum Wheels
To avoid personal injury or damage to com-
ponents only tire technicians with experi-
ence and training on custom wheels should
attempt to service expensive custom alloy
or aluminum wheels, high-performance
low-profi le tires and EMT/run-fl at tires.
Many tires/wheels have pressure sensor
devices that are manufactured by differ-
ent companies, there are no standards on
type or mounting; therefore, follow the in-
structions that apply to the sensor being
serviced. For further information on these
devices, contact the individual sensor man-
ufacturer.
Pre-Operation Notes:
• Ensure all weights have been removed.
• Assistance will be required on wide wheels.
• Clamp wheel from the outside.
• Use ample lubricant for mounting and demounting
• Always review wheel nicks and/or scratches with
the owner before servicing.
Performance Tires & Wheels • Demounting
Follow these instructions for performance type tires
and wheels, including run-fl at tires and their associated
wheels, and asymmetrical hump wheels.
1.
Remove the valve core and completely defl ate the
tire. On many performance wheels a valve type sensor
may be inside of the rim. These devices are expensive
and should be serviced with care. After defl ating the
tire, loosen and remove the retaining nut and then tap
lightly with a hammer to allow the valve sensor to fall
inside the tire before further service work (fi gure 24).
Figure 24 - Rim with a Valve Type Sensor (Tire Removed for
Clarity)
2.
Some wheels have a low-pressure sensor/trans-
mitter strapped to the wheel. This is especially true on
run-fl at tire/wheel systems. To avoid damaging the sen-
sor, always loosen the top bead with the valve stem at
the 2 o’clock position fi rst, to determine sensor loca-
tion. Then loosen the bottom bead and the remaining
circumference of the beads as necessary at a location
that will not damage the sensor. (Figure 25).
Figure 25 - Wheel with Strapped on Low Pressure Sensor/
Transmitter
3.
Wheels with an asymmetrical hump have a larger
“ledge” type hump around the wheel except at the
valve hole making them more diffi cult to mount and
demount loosen bead (Figure 26).
Figure 26 - Asymmetrical Hump Wheel
4.
Pull the bead loosener shoe away from the ma-
chine and roll the tire in position with the valve stem in
the 2 o’clock position (above the bead loosener shoe).
Always loosen the bead on the narrow/mounting side
of the wheel fi rst (fi gures 2 and 27).
Figure 27 - Position Tire for Bead Loosening
Smooth
Hump At
Valve Hole
Ledge
Hump Rest
of Wheel
Valve Stem
Sensor
Valv
e St
em
