Poison Spyder JK ROCKBRAWLER II REAR BUMPER WITH TIRE CARRIER - Manual (Page 5)

INSTALLATION INSTRUC
TIO
NS
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Poison Spyder Customs • JK ROCKBRAWLER II REAR BUMPER Page 5
everything tight while the tailgate is shut.
Once the tie rod has been properly adjusted,
tighten both jam nuts.
FIGURE 9
28. Measure the overall height of your spare
tire (NOT one of the mounted tires on your
Jeep!), divide that measurement in half, then
add one inch. The resulting number will be
your Tire Mount Height measurement. With
the tire carrier closed and latched, measure
upward from the recessed step surface of the
bumper, and make a small mark on the tire
carrier at the tire mount height measurement.
29. Use (4) 7/16-14 x 1 Gr8 Hex Head Cap
Screws with (4) 7/16 Flat Washers and (4)
7/16-14 Nylon Insert Lock Nuts to attach
the Tire Mount - Carrier Side to the Tire
Carrier, centered on the mark you made in
the previous step. The slots in the tire carrier
allow for some adjustment, however if there
isn’t enough adjustment to center the Tire
Mount exactly centered on your mark, move
it up slightly to the next set of slotted holes
in the carrier. Tighten the four bolts/nuts to
approximately 50 ft.-lbs.
30. Look at the Tire Mount - Tire Side, and
note that there are wheel stud holes for
several different bolt patterns. Use the Bolt
Pattern Template provided at the end of these
instructions to determine which THREE holes
to use for your specific bolt pattern. Once
the three holes are correctly identified, mark
them with a felt-tip marker.
31. Use a shop press or hammer to drive the
three provided Wheel Studs into the mounting
plate, using the holes that were marked in the
previous step. Make sure the studs point
in the opposite direction from the V-channel
piece that is welded to the back of the plate.
32. Lay your spare tire on the floor with the
mounting surface of the wheel pointed up.
Lay a long straight edge (yardstick, level, or
other suitable item) across the middle of the
tire. Measure the vertical distance from the
straight edge to the wheel mounting surface.
This is the Overall Offset measurement,
including any bulge in the tire sidewall.
33. Fit the Tire Mount - Tire Side channel on to
the corresponding beam of the Tire Mount -
Carrier Side. Use (3) 7/16-14 X 3 Gr8 Hex
Head Cap Screws with (6) 7/16 Flat Washers
and (3) 7/16-14 Nylon Insert Lock Nuts to
secure the Tire Mount-Tire Side to the Tire
Mount - Carrier Side, using the slotted holes
provided. Adjust the position of the mounting
surface of the distance between the Tire
Mount and the surface of the tire carrier frame
is 1/4 to 1/2 inch LESS THAN the Overall
Offset measurement found in the previous
step. Once properly adjusted, tighten the
three bolts/nuts to approximately 50 ft.-lbs.
NOTE: Some tire/wheel combinations, such
as 12.50 wide tires on stock Jeep wheels,
may require more Overall Offset than the
adjustment in the Tire Mount components allows
(approximately 4-3/4” to 6-3/4”). In these cases,
source a wheel spacer of suitable thickness to
make up the difference.
34. With the help of a friend, lift the spare tire
onto the Tire Mount - Tire Side, and fit the
previously installed lug studs through the
holes in the wheel. Tighten the (3) Lug
Nuts. This will draw the sides of the tire
tightly against the frame of the Tire Carrier, to
prevent rattles and squeaks.
35. Use (4) 1/4-20 X 3/4 SS Button Head Cap
Screws, (4) 1/4 Flat Washers and (4) 1/4-20
Nylon Insert Lock Nuts to fasten your license
plate to the License Plate Mount.
36. Use the 1/4-20 X 3/4 Hex Head Cap Screws
with 1/4 Flat Washer and 1/4-20 Wing Nut to
fasten the License Plate Mount to the Tire
Mount at the center of the spare tire. Note
that you will need to keep these wrenches
available in the vehicle in order to remove the
license plate mount to access your spare tire
in the future.