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Specifications subject to change without notice - Check our website for valuable information including videos, workshop and operations manuals. www.jjamusements.com
503-304-8899
ENDURANCE CL
UTCH PLA
TES
TM
TUBES
The J&J Bigfoot tire was designed to give maximum tread life and sidewall integrity. The tube is a key piece of the
design and has a special size and valve stem configuration. Always use J&J tubes (#00780-M) for best results and to
avoid possible premature failure of the tire and/or tube.
RIMS
Over the years, J&J has used two distinct styles of wheel rims. They have the same look and are the same size and
basic design. The difference lies in the style of the lug nuts used. Please note, the lug nuts are not interchangable from
one wheel design to the other.
Old style
New style
DISC-LOCK LOCKING NUT INSTALLATION & REMOVAL
J&J uses the Disc-Lock locking nut on our bead-lock wheel rims. The Disc-lock safety wheel nut is a free spinning,
vibration-proof wheel nut, specifically designed to prevent wheel loss on commercial vehicles such as trucks, trailers
and buses with hub-piloted wheel systems.
They are used only on J&J serrated bead lock rims.
(#1-50-0189)
The system is essentially a double nut with ramps on two mating halves. When the inner hex of
the nut tries to loosen, it works against the incline of the outer hex. This is a simple and very posi-
tive way to help insure that lug nuts will not work loose.
To install the Disc-Lock locking nut, follow the same procedure for conventional nuts
and torque to normal specifications. To remove the Disc-Lock locking nut, place the wrench
or socket over both hexes and loosen. It is critical that the socket is seated over both halves of the nut
as shown in the illustration below.
(Use a 15mm deep/thin wall, 6-point socket.)
15mm
Note: If the two parts “pop” apart they can usually be reassembled with a light tap. if the two halves will not stay
together, the nut must be replaced.
Outer hex
Inner hex
OLD STYLE: Raised lug stud holes to
match the tapered lug nuts.
NEW STYLE: Rim is flat around the
lug stud holes and uses a flange type
“Disc-Lock” lug nut. Rims also have a
serrated bead area to help prevent tire/
bead slippage.
J&J SPECIAL TOOL
#1-60-A0311
This 15mm socket is machined
to fit within the tight confines
of the wheel assembly.
