Archive for Wheel Markings

Offset and Custom Wheels

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Where wheels are concerned, offset is a measurement from the mounting surface to the centerline. Offset is a determining factor in fitting wheels to your car, and it determines whether the wheels you choose will hit your frame, rub your fenders or fill your wheel wells nicely. Here, you will learn about offset and its role in wheel selection.

Offset Types

There are three offset types: zero, positive and negative. Zero offset wheels have a mounting surface that’s in the center of the wheel, while positive offset wheels have a mounting surface that’s outside of the centerline. Negative offset wheels have a mounting surface closer to the vehicle’s center.

Wire Wheels

Wire car wheels are available in front wheel drive, reverse and standard offsets. Standard offsets fit best on rear wheel drive cars; it’s a positive offset, but not by much. Standard offset wheels are typically larger in diameter, and fit nicely in most vehicles’ wheel wells.

Deep Dish Wheels

Reverse offset custom wheels are sometimes referred to as “deep dish”, and it means that spokes sit further back. Reverse offset wheels give the deep-lipped look that many people are looking for, and many use reverse offset wheels in a smaller diameter to avoid rubbing in the wheel well. However, reverse offset wheels are available in diameters up to 22”.

FWD Offset Wheels

These wheels have a high positive offset, and as their name implies, they’re designed just for vehicles with front wheel drive. Hubs on most FWD vehicles protrude farther than those on rear-wheel-drive cars, and using another offset can wear parts out faster than normal.

Wheel Markings

If you take a close look at any wheel, you will find numbers and letters stamped on the surface. The markings will read something like this: 22×8 135-6-40. The numbers break down as follows:

  • 22×8: the diameter & width of the wheels in inches
  • 135: PCD (bolt pattern measured in millimeters)
  • 5: bolt holes
  • 40: Millimeter measurement of offset

The numbers vary from one wheel to the next, and depend largely on your wheel size and your vehicle. The numbers and information above can be used to determine whether a set of wheels will fit your vehicle. Hopefully the information given here will help you learn about wheel offset and make an informed decision when buying. I just purchased a set of Simmons wheels online and found an amazing deal at AutoCraze. Be sure to check them out if you’re looking for cheap Simmons wheels.