offset of a wheel is the distance from its hub mounting
surface to the centerline of the wheel. The offset
can be one of three types.
The hub mounting surface is even with the centerline
of the wheel.
The hub mounting surface is toward the front or wheel
side of the wheel. Positive offset wheels are generally
found on front wheel drive cars and newer rear drive
The hub mounting surface is toward the back or brake
side of the wheels centerline. "Deep dish"
wheels are typically a negative offset.
the offset of the wheel is not correct for the car,
the handling can be adversely affected. When the width
of the wheel changes, the offset also changes numerically.
If the offset were to stay the same while you added
width, the additional width would be split evenly
between the inside and outside. For most vehicles,
this won't work correctly.
many aftermarket alloy wheels are designed to use
your cars original lug nuts or bolts, others
require new hardware. It may be something as critical
as differences in the wheels lug seat design
as shown below, or something as simple as shorter
lug heads to allow the wheels center caps to
fit. Keep a set of your vehicles original lug
nuts or bolts in the trunk just in case you ever need
to use your spare tire or borrow a spare on a stock
Lug Nut Torquing
installation requires that the wheel lug torque be
set to the recommended specification for your vehicle.
These torque specifications can be found in your vehicles
shop manual or obtained from your vehicle dealer.
Finish tightening the lugs down with an accurate torque
wrench. Use a crisscross sequence (shown below) until
they have reached their proper torque value. Be careful
because if you over torque a wheel, you can strip
a lug nut, stretch or break a wheel stud, and cause
the wheel, brake rotor and/or brake drum to distort.
When installing new wheels you should re-torque them
after traveling the first 50 to 100 miles. This is
necessary because as the wheels are breaking
in they may compress slightly allowing their
lugs to lose some of their torque. Simply repeat the
same torque procedure listed above.