How to measure bolt pattern on rims

Counting the Bolts 1. Lay the rim down with the bolts facing you.

The conversion of inches to mm is 1 inch to 254 mm.

How to measure bolt pattern on rims. Counting the Bolts 1. Park the vehicle and turn off the engine. You dont want your vehicle or trailer to move while youre measuring the.

Use a screwdriver to remove the hubcap from 1 of the tires. The wheels on your vehicle may have a cap over the hub. Count all of the bolts in the.

Namely 4 lugs wheels have four holes that are symmetrical therefore measuring the bolt pattern is not a hard thing to do. All you need to do in order to measure precisely is to start from the midpoint of one circle. Next you need to draw a line to the opposite circle to the center point as well.

The easiest way to estimate the 5 lug bolt pattern is to measure from the back of a hole to the center of the second hole. For a 4 lug wheel measure center to center of two holes directly across from each other. Measuring a 6 bolt wheel requires you to measure center to center of two holes directly across from each other.

Calculating the Bolt Pattern 1. Lay the rim down with the bolts facing you. Place your rim flat on the work surface so that the bolts in the middle.

Count the bolts to determine whether it is a 4 5 6 or 8-lug pattern. Count the number of bolts that go around the. Measure from the middle.

The first step in determining your wheel bolt pattern is counting how many bolts or lugs your wheel has. Typically this will be 4 5 6 or 8. Next youll measure how many inches apart the bolt holes are.

These two steps together will give you your bolt hole pattern. Bolt patterns are classified 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 video shows how to measure the bolt pattern of a 6-lug trailer wheel. Or any other wheel.

Measure using the metric side of the ruler in millimeters. So if you have a four-lug hub and the measurement came out to 100mm the bolt pattern is 4 X 100 which means that you have four lugs and that the separation is 100mm. Its really very simple to measure your wheels bolt patter with a tape measure or ruler.

This is sometimes called the Bolt Circle or some such thing. One other trick is to to use a straight edge block across the BACK of two of the lugs a and then set the ruler on that and measure up to the center of the bolt like in the picture. If you would like to determine the bolt pattern of your car or a set of rims the first thing you need to do is count the number of studs.

If there are 46 or 8 studs simply measure the center to center distance between two studs that are across the hub from each other. That measurement is your bolt pattern diameter. The diagram is an example of the proper method for measuring bolt patterns.

The conversion of inches to mm is 1 inch to 254 mm. The bolt pattern or bolt circle is the diameter of an imaginary circle formed by the centers of the wheel lugs. Bolt patterns can be 4 5 6 7 or 8 lug holes however tuner applications are typically 4 or 5 lug.

Tire rim bolt holes are measured center-to-center meaning you are measuring the distance between the center the middle of the hole the center of another hole. If you are measuring the wheel the easiest way is to measure the distance between the center of one lug hole to the center of the lug hole adjacent to it then look on the chart and if that measurement is 2-58 inches the bolt pattern is 5 on 4-12. If it measures 3 inches the bolt pattern would be 5 on 5.

This is the way to measure the bolt pattern on your vehicle if it is not a 5 lug so 4 lug 6 lug and 8 lug all need to be measured this way. Remove the existing wheel the rear wheel is usually the easiest to measure because the hub normally wont be in the way. Use a ruler or tape measure that shows 32 nd s of an inch.

Measuring 5-lug go-kart wheels is also relatively simple. Select 2 bolts that have a 1 bolt spacing on either side. Now start at the outer wall of the bolt hole and measure all the way to the center of the other bolt hole.

This distance will give you the bolt circle diameter for a 5-lug go-kart wheel. Before worrying about equations remember the easiest way to get BCD for a bolt pattern with even numbers of bolts is direct measurement. Strait across from one bolt or hole to the opposite bolt or hole on the other side of the hub.

If you dont want to calculate use this table.