5
28
Single and wide
base wheel, stud
located, ball seat
mounting
(continued)
NOTICE: Do not exceed
maximum wheel load.
Cus tomer must compare
OEM vehicle load rating to
maximum wheel load rating.
Refer to tire manufacturer’s
recommendation for proper
tire pressure. Be fore mounting
the tire perform a wheel
fitment check to insure
proper clearance from any ob-
structions.
NOTICE: Check for and
replace bent, broken, cracked
or damaged studs. When
replacing broken studs, always
replace the studs on each
side of the broken stud. If two
or more studs are broken,
replace all the studs for that
wheel position. Check with
the stud manufacturer for
regular maintenance and stud
replacement practices.
All wheel fastener hardware
should be grade 8 or metric
conversion 10.9. Follow the
hardware manufacturer’s
recommendations when
replacing studs.
Dualed wheels, stud
located, ball seat
mounting
5-6
Rear wheels are most frequently mounted as duals. Each inner aluminum wheel is attached by 10 inner
cap nuts. Alcoa recommends use of inner cap nuts 5978R, 5978L, or 5988R, 5988L
(see 5-2, page 26).
Cap nuts recommended by Alcoa are compatible with Alcoa wheels. Hardware of equal dimensions and
strength may be used.
Continued on next page.
Correct wide base wheel mount-
ing with 1-1/8-inch
stud located, ball seat mount.
1-1/8" Stud
Drum
Alcoa Aluminum Wide Base Wheel
Disc Mate (when used)
Outer Cap Nut
P/N 5996R or L
(See 5-2, page 26)
Hub
1.8 inch
minimum
stud standout
Correct single mounting with
3/4-inch stud located, ball seat
mount.
3/4" Stud
Single Alcoa Aluminum Wheel
Disc Mate (when used)
Drum
Outer Cap Nut
P/N 5995R or L
(See 5-2, page 26)
Hub
1.8 inch
minimum
stud standout
Correct wide base wheel mount-
ing with 3/4-inch
stud located, ball seat mount.
3/4" Stud
Alcoa Aluminum Wide Base Wheel
Disc Mate (when used)
Drum
Outer Cap Nut
P/N 5995R or L
(See 5-2, page 26)
Hub
1.8 inch
minimum
stud standout
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