Common Racing Wheel Questions & Topics
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Jump To: Bolt Patterns | Lug Torque Specs
Determining the Bolt Pattern of Your Wheel - What is a Bolt Pattern?
The bolt pattern of a wheel tells us the number of lugs (or bolt holes) and the diameter of the circle the lugs sit on.
For example, a 5 on 4-1/2" bolt pattern lets us know we need a wheel with 5 lugs that are spaced out evenly on a circle that has a 4-1/2" diameter.
Measuring Wheel Width and Wheel Rear Spacing
The two key measurements to be considered before buying racing wheels
are WHEEL WIDTH and WHEEL REAR SPACING.
WHEEL WIDTH - This may be determined by measuring the distance
between the inner edges of the rim beads. See Illustration "A" at the right.
WHEEL REAR SPACING - To measure rear spacing, place wheel face down,
lay a straight edge or rule across the back of the wheel and measure down
to the mounting pad surface. See Illustration "B" at the right.
Jump To: Bolt Patterns | Diameter/Rear Spacing | Lug Nut Torque Specs
Jump To: Bolt Patterns | Diameter/Rear Spacing
* Base Info Source: Bassett Racing Wheels FAQ's (click here)
To determine the bolt pattern on a wheel,
use the number of lugs and the bolt circle:
For wheels with an EVEN number of lugs:
Measure CENTER-to-CENTER on lugs directly
across from each other
For wheels with an ODD number of lugs:
Measure from the CENTER of one hole to the
BACK of the second hole as shown at the right.
NOTE: With an odd number of lugs, there is not a lug directly opposite
any hole, so finding the circle diameter can be challenging.
Lug Nut Torque Specifications*
Most Steel Circle Track Wheels require a hardened steel 1" oversize, open-ended lug nut with a
45 degree seat chamfer. Before going to the track, always use a torque wrench and torque lugs to 85 ft-lbs. For brand new wheels, make sure to re-torque after the first use because as the powder-coat paint gets worn-off, it can cause the lug nuts to loosen slightly. A good rule of thumb for lug nut torque settings are as follows:
7/16” Wheel Stud = 75-85 ft-lbs 1/2" Wheel Stud = 85-95 ft-lbs 5/8” Wheel Stud = 130-140 ft-lbs
IMPORTANT NOTE & DISCLAIMER: Users should ALWAYS check with the wheel stud manufacturer and the wheel manufacturer for exact torque specifications they should use.
This Tech Page Is Intended To Help Customers Make An Informed Buying Decision
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