This Moroso 7/16-
20 wheel stud
measures 2 7/8
inches long. It has a
0.560 inch knurled
shank and presses
into the wheel
hub. The stud also
has a quick start
or “bullet” nose to
facilitate lug nut
installation. It is
intended for use
on the front axle
of a race car. You
should use a larger
stud out back if you
have aftermarket
axles.
Here’s another stud
type you might
come across. Initially
designed for NASCAR
competition,
it
has a “quick start”
segment machined
on the nose so
a stock car-style
quick start or acorn
type lug nut can be
installed
quickly
without
cross
threading. This stud
is also installed from
the backside of the
axle, using a lock
washer for retention.
This is a 1/2-20 x 3 1/2 inch long axle
stud for use on rear axles. It screws
into the backside of the axle and
is held in place with a lock washer.
The stud head on this stud must
be torqued to 65 lbs.-ft. It is a good
idea to use a “severe service” thread
locking compound like red
Loctite on the bolt/flange
(not on the actual lug
segment of the
stud!)
Often referred to as a drive stud, this axle
stud has a 5/8-18 inch thread on each end
with an 11/16 inch shoulder in between. The
shorter threaded segment fits in the axle flange
and is secured with a jam nut. The shoulder (see the
pointer) is the same OD as the lug hole ID found on
most aluminium racing wheels. This ensures that the
stud actually does the driving of the wheel, not the lug nut.
Several manufacturers offer a series of lug
nuts including the standard flanged model
on the left and a series of reduced hex
nuts. Made for use with drive studs, these
nuts have a 7/8 inch hex head and require
special thickness washers.
13 fastlane