Wheels Articles Useful information

How to Identify the correct lug nut and wheel lock for your vehicle

 There are five main components to identify the correct lug nut or wheel lock:

  • Thread Size
  • Thread Pitch
  • Seat Type
  • Length/Dimensions
  • Finish/Color

 

How to read sidewall tire numbers and markings

How to read sidewall tire numbers and markings

The sidewall of your tires is filled with important information that tells you everything you need to know about your tire. The numbers can be a bit overwhelming to the untrained eye, so the best way to understand tire markings is to take an example and break it down, bit by bit.

Below are tips and information to help you learn how to read tire size and other tire markings commonly seen in the U.S.

Centre Bore

Centre Bore

The centre bore is the size of the hole in the centre of the wheel where the spigot fits through.  The centre bore, (also known as spigot size), is the diameter of this hole, usually measured in millimetres.

Bolt Pattern/Pitch Circle Diameter (PCD)

Bolt Pattern/Pitch Circle Diameter (PCD)

PCD (Pitch Circle Diameter) is the measurement of the diameter of the imaginary circle drawn through all of the wheel bolts or studs on a wheel.  It is also known as the 'bolt circle'.

Offset

Offset

The offset of a vehicle's wheel is the distance between the centerline of the wheel and the plane of the hub-mounting surface of the wheel. It can thus be either positive or negative, and is typically measured in millimeters. Offset has a significant effect on many elements of a vehicle's suspension, including suspension geometry, clearance between the tire and suspension elements, the scrub radius of the steering system, and visually, the width of the wheel faces relative to the car's bodywork.

Tire Sizing System

Tire Sizing System

There are a number of different systems in use today that describe the various tire sizes used on performance, passenger and light truck vehicles. An attempt is currently underway to develop a worldwide system, but presently you must be familiar with several different systems.

How to change a tire

How to change a tire

Have you ever been stuck on the side of the road with a flat tire? Do you want to be able to change a tire without having to ask for help?

Fortunately, changing a tire is a pretty simple task, provided you're prepared and willing to exert a little effort.

Tire Repairs

Tire Repairs

A flat tire requires immediate attention. A flat should be replaced with your vehicle's OEM (Original Equipment Manufacture) spare wheel/tire right away, until your tire has been inspected for punctures and leaks. If a puncture is found, it should be repaired promptly to prevent any further tearing. Tire patches should be applied carefully, to both the inner and outer parts of the tire. Unless you have the proper equipment and experience, a qualified mechanic should perform these procedures as they require dismounting the damaged tire from the wheel.

Tire Temperature

Tire Temperature

A tire's temperature grade indicates how well the tire can dissipate heat under test conditions, assuming proper inflation and maintenance of the tire.

Air Pressure

Air Pressure

Optimal tire performance requires correct inflation. Tire pressure can change over time due to climate changes, natural air loss, or other factors. To maintain proper inflation, you should check your tires periodically. Under inflation of tires can lead to early or uneven wear, traction problems, and stability problems.