Technical Help

Basic wheel maintenance
How to measure bolt patterns
Wheel offsets and back spacing
How to safely torque wheels
Common wheel terminology


wheel_careBasic Wheel Maintenance

Important! All warranty claims will be voided if improper maintenance or improper cleaning agents are used. You or your customer have invested in a product of the highest quality and workmanship. Custom wheels do require care to maintain their factory appearance. We strongly suggest that you take a few reasonable steps to protect your investment. Make sure your customers are aware of proper maintenance techniques before they leave your shop. This will avoid warranty issues, and keep your customers happy!

  • Regular Cleaning. Typical road soils trap moisture which can cause corrosion over a period of time. Brake dust, caused by friction of your cars braking system, is itself corrosive, and can cause pitting of the wheels finish. These soils must be removed regularly – preferably weekly – depending on your driving habits.
  • Use of Proper Cleaning Agents. We recommend a mild dishwashing soap and water to clean your wheels. Your wheels finish should be treated as you would treat the finish of your car. Most household cleaning agents are too harsh for the finish of your wheels, and must be avoided. There are a vast number of commercially available wheel cleaners on the market today, but we urge extreme caution regarding their use, since they tend to be acid or lye based.
  • Additional Tips. To prevent scratching of the wheels finish, never clean your wheels with scouring pads or dense metal polishes. If you use automatic car washes, tell them not to use steam cleaners or strong chemicals to clean your wheels. They can cause permanent staining or corrosion. Use caution when cleaning tires with steel wool or a bristle brush. These types of abrasive materials must not come in contact with the wheels as they will damage the appearance of the wheel permanently. Never spray cold water on extremely hot wheels. Always allow time to cool before cleaning with soap and water.

How to measure bolt patterns

bolt


Wheel offsets and back spacing

backspaceThe easiest way to measure backspace is to lay the wheel face down onto the ground so the backside of the wheel is facing up. Take a straight edge and lay it diagonally across the inboard flange of the wheel. Take a tape measure and measure the distance from where the straight edge contacts the inboard flange to the hub mounting pad of the wheel. This measurement is backspace. The above photo shows three wheels with 2″,3″, & 4″ backspace.

offsetTo calculate offset you’ll need the following measurements:
::: Wheel backspace
::: Wheel Width
::: Wheel Center line (wheel width / 2)

Subtract:
Wheel center line from Wheel backspace to get offset. If backspace is less than the wheel centerline the offset is negative If backspace is greater than the wheel centerline the offset is positive.

Tip:
::: To convert from inches to mm multiply by 25.4
::: To convert from mm to inches divide by 25.4
conversion


How to safely torque wheels

torqueIMPORTANT NOTICE: As with all types of wheels retorque lug nuts after the first 25 miles & at 100 mile intervals until lug torque is maintained.

Note: Always refer to Owner’s Manual for proper factory specifications that take precedence over the listed recommendations.


Common wheel terminology

terminologyBolt pattern or lug pattern or bolt circle is determined by the number of bolt holes and the bolt circle diameter.

Hub Diameter or center bore is the hole at the center of the wheel.

Rear spacing or back spacing is the distance from the backside of the wheel mounting pad to the outside of the rim flange.

Offset: The distance from the centerline of the wheel to the mounting surface of the wheel.

Negative offset: When the back of the bolt pad is closer to the inside of the wheel; when mounting surface is inboard of the rim centerline.

Positive offset: When the back of the bolt pad is closer to the street side of the wheel; when the mounting surface is outboard of the rim centerline.