Understanding Bolt Patterns
To understand about bolt patterns, we must first learn about lug holes. The lug holes are the three or more holes surrounding the large hub bore located at the wheel’s center. The lug holes are the mechanical attachment point of the wheel to the vehicle, using lug nuts or lug bolts, often simply referred to as lugs.
The lug holes on your wheels may be small, but they perform a big task by making sure your wheels stay attached to the vehicle. These lug holes are organized in a circular pattern called a bolt pattern, and this pattern helps determine which wheels fit on your vehicle.
Remember, your vehicle will only accept a wheel with the same bolt pattern as the original equipment wheel.
There are several types of lug hole seats and they are designed to work with the precisely matched lug type. Ball-seat lugs work with wheels that have a corresponding round lug seat. Acorn-seat lugs are used with wheels that have a tapered lug seat. Torque-retention, mag, and shank style lugs all have a flat, washer-like seat area that will correspond to a flat lug seat in the wheel. When using a torque-retention, mag, or shank lug, it is important to make sure that the shankpiece is the proper length for your needs. Using lugs that don’t correspond to the lug hole seat in the wheel can lead to lug hole damage, improperly secured wheels, and even cause the wheel to detach from the vehicle: it is very important that you use the proper lugs.
Learn more about lug nuts
Your replacement lug nuts may not work with your spare wheel. Unless you buy a new wheel and tire to replace the spare, we recommend keeping enough of the original equipment lug nuts, in order to properly install the original spare should the need arise.
Measuring Bolt Patterns
|4-Lug Bolt Pattern Conversions (mm to Inches)|
|4-98mm = 4-3.86"||4-100mm = 4-3.94"||4-108mm = 4-4.25"||4-110mm = 4-4.33"||4-114.3mm = 4-4.5"|
|5-Lug Bolt Pattern Conversions (mm to Inches)|
|5-98mm = 5-3.86"||5-100mm = 5-3.94"||5-108mm = 5-4.25"||5-110mm = 5-4.33"||5-112mm = 5-4.41"|
|5-114.3mm = 5-4.5"||5-115mm = 5-4.52"||5-120mm = 5-4.72"||5-120.7mm = 5-4.75"||5-127mm = 5-5"|
|5-130mm = 5-5.12"||5-135mm = 5-5.3"||5-139.7mm = 5-5.5"||5-205mm = 5-8.07"||5-150mm = 5-5.91"|
|5-155mm = 5-6.1"||5-165.1mm = 5-6.5"|
|6-Lug Bolt Pattern Conversions (mm to Inches)|
|6-114.3mm = 6-4.5"||6-115mm = 6-4.52"||6-127mm = 6-5"||6 x 132mm = 6 x 5.2"||6-135mm = 6-5.3"|
|6-139.7mm = 6-5.5"|
|8-Lug Bolt Pattern Conversions (mm to Inches)|
|8-165.1mm = 8-6.5"||8-170mm = 8-6.69"||8-200mm = 8-7.87"|
Tire professionals classify bolt patterns using a two number system. The first number indicates how many bolt holes are in the wheel, and the second describes the diameter of the imaginary circle they make. For example, a 5-100mm bolt pattern means that the wheel has 5 bolt holes equally spaced on a 100mm circle. This distance is measured across the wheel center. Usually, large vehicles have more bolts arranged in a larger bolt circle. Smaller vehicles typically have fewer bolts arranged in a smaller circle. The most accurate ways to measure bolt patterns are depicted in the illustrations below.
4-bolt Patterns are measured in a straight line from center to center of two bolt holes sitting directly across from each other.
5-bolt These patterns can be more difficult to measure since the bolt holes are not directly across from each other. You can estimate the measurement by using a straight line from the backside of one hole to the center of the third bolt hole. The accurate measurement is depicted below and can only be measured with a special tool called a bolt pattern gauge or using a complex geometric equation.
6-bolt Patterns are measured in a straight line from center to center of two bolt holes sitting directly across from each other.
8-bolt Patterns are measured in a straight line from center to center of two bolt holes sitting directly across from each other.
Different Types of Bolt Patterns
Discount Tire sells wheels with 3, 4, 5, 6, and 8 applications, each of which are commonly equipped on certain vehicle types. Learn about each of these patterns below.
In addition to the bolt patterns listed above, many manufacturers produce wheels with dual bolt patterns.
Dual bolt patterns have an additional set of bolt holes, enabling the wheel to accept two different bolt patterns. For example, a wheel with a 5-100/114.3 millimeter bolt pattern has ten total bolt holes. It can accommodate both the 5-100 millimeter bolt pattern, and the 5-114.3 millimeter bolt pattern.
For more information or help measuring your bolt pattern, visit one of our trusted experts at your local Discount Tire store.