Bolt patterns are written with 2 measurements: the number of bolts and the diameter from center to center. Bolt pattern measurements are typically taken in millimeters. When measuring the distance between the bolt holes on any wheel, it is important to keep in mind that that patterns with an even number bolt holes (4, 6, or 8 holes) are a lot easier to measure than patterns with an odd number bolt holes (3, 5 or 7 bolt holes). So a 4x100 bolt pattern means that there are 4 lugs, with a diameter of 100 millimetres (3.9 in). The majority of boat trailers on the road have a 4, 5 or 6 lug pattern. 4 X 156 Bolt Pattern Measurement and Specifications. Lowest price guaranteed. If you don’t have the template handy, you measure from the center of any hole, skip a hole in either direction and then measure to the outside edge of that hole. How to Measure Backspacing. 5-lug bolt patterns are a little trickier to measure since the bolt holes aren’t directly across from each other. The 4 X 156 Bolt Pattern or Pitch Circle Diameter (PCD) is made up of the stud count (4) and the bolt circle measurement (156), the notional circle determined by the center position of the studs.. How To Measure 4 Lug Bolt Patterns. Below are a few diagrams to help you measure your bolt pattern with a normal ruler or measuring tape. You can also determine your 5 bolt pattern by measuring the distance between the center of one bolt hole, to the center of the bolt hole next to it. A bolt circle of 5x114.3 mm would indicate a 5 lug pattern on a circle with a diameter of 114.3mm (or 4.5"). Here’s the cheat sheet. Bolt Circle Diameter (BCD) is the diameter of the circle that goes through the center of all of the bolts on your chainring. Bolt Circle Diameter . Click for larger. See Also: Wheel Bolt Pattern Cross Reference ~ Look-up a vehicle bolt pattern by Make/Model or browse all vehicles with a particular bolt pattern. If there are 5 studs, multiply the measurement by 1.05 to get the bolt pattern diameter. Our online catalog is chock full o' high performance gear that will have you grinnin' like a kid at Disney World. Wheel Bolt Pattern is the measured diameter of an imaginary circle formed by the centers of the wheel studs or bolt holes. 5x114.3 mm is also referred to as 5x4.5). The closest you can get is to measure from the center of one lug to the outer edge of the lug farthest away. The diagrams below indicate the proper measuring methods. Bolt measurements can be calculated in millimeters or inches, but bolt measurements specified in inches are international. Now that you know how to measure lug bolt patterns, here … Online Catalog. This is how to measure your tire bolt pattern based on your specific lug count. Measure center to center of two holes directly across from each other. Best how to measure bolt pattern selection available. A bolt circle of 4x100 would indicate a 4-lug pattern on a circle with a diameter of 100mm. First, measure the center to center distance between two studs that are across the hub from each other. It’s the measurement (diameter) of an imaginary circle passing through the centers of all the bolts in a round pattern – like chainring bolts that hold the rings to the crank. Measure the bolt patterns of the rim. The accurate measurement is depicted here and can only be measured with a special tool called a bolt pattern gauge or by using a complex geometric equation. You have 4 lug (bolt) rims on your machine, but I will show 3 and 5 bolt rims also. If you were to draw a circle through all of the lug holes in your wheel, the diameter of that circle, is your bolt pattern. The diagram indicates the proper measuring methods. For vehicles that use 4, 6, or 8 lugs, the simplest way to find its inner diameter is to measure the distance between holes directly across from one another. It is critical to know the BCD of your crankset when you are selecting a new chainring for your bike. Some wheels have more than one bolt pattern on the same wheel to accomodate multiple fitments. MEASURE A BOLT PATTERN. 4 Bolt Rim. 5-bolt patterns can be more difficult to measure since the bolt holes are not directly across from each other. Stay Connected. So if you see 4 1/2 inches, you have a 5 on 4 1/2 ( also 5×4.5 and 5×114.3) bolt pattern. The correct terminology for referencing bolt patterns is to . To get 5 and 7 lug bolt patterns it's not so simple. A bolt circle of 4x100 would indicate a 4-lug pattern on a circle with a diameter of 100mm. The bolt pattern consists of two numbers and looks like this (5x4.50) - the first number in this example "5" indicates how many bolt … When searching for aftermarket wheels, you'll find that the wheel bolt patterns are listed, for you to determine which wheels will fit your vehicle. Basically, the bolt pattern of a wheel is the diameter of the circle that the bolt holes are drilled on. Measuring bolt patterns is a critical part of ordering wheels. Using the illustration below as guide, measuring backspacing is a simple two-step process. The first concept one must be familiar with to understand bolt patterns is called BCD, for Bolt Circle Diameter.If you lay one of your wheels on the ground and draw a circle that passes through the center of each of the lug holes, that is the Bolt Circle, and it only remains to measure the diameter of said circle. Skipping A Bolt Hole In Between. This means they are a 5-lug pattern with a diameter from lug-to-lug of 100 millimeters. Bolt pattern or bolt circle is the diameter of an imaginary circle formed by the centers of the wheel lugs. As the bolts will be evenly spaced, the number determines the bolt pattern. Common bolt patterns are 4, 5, 6, or 8 lug holes. Trailer wheel bolt patterns can be defined by the number of bolts or lugs per wheel and the diameter of the circle that the bolts are arranged on. 3 Bolt Hole with a 10" Center Hole. On some cranks, like 4 bolt cranks, it’s fairly easy to measure, but for road and cyclocross with 5 bolts, it’s not so easy. Ea A 5-lug pattern is where things can get confusing. The bolt pattern is merely the number of bolts on the wheel. Measure the distance from the outside of one stud to the inside of the opposite stud on the conerter. Other common bolt patterns are 5×4.75 and 5×5. Measure from the middle of one stud to the outside of the second stud (skipping a stud). In your situation it will probably end up as 10 7/16" or so which is the 10.5" pattern Measure Trailer Wheel Bolt Pattern. This is where the rim sizing starts to get a little tricky. 6 Bolt with a 10" Center Hole. You measure 6-lug go-kart wheels the same way you would measure 4-lug wheels. As all 6 bolt holes are evenly spaced out in a circular pattern, simply select two opposite bolt holes. If the numbers match, that does not necessarily mean the bolt pattern will fit. 3 Bolt Hole with a 9 3/8" Center Hole. Below we illustrate how to measure … Figuring out the right bolt pattern is rather simple, but it is extremely important that the measurements are accurate. A "bolt pattern" is essentially the diameter of the "bolt circle". Four (4) Bolt. There are lots of tools made for measuring bolt patterns on OEM Rims, but unless you need to do it every day you may not want to go buy another tool to clutter your garage! That should get you your bolt pattern measurement. On the new set of wheels you found online, they are listed as 5×100. Determining the bolt pattern is rather easy, but it is very important that accurate measurements are taken. To get a 4, 6 or 8 lug bolt pattern use a device to measure from the center of one lug to the center of the lug directly accross from it. To measure your bolt pattern, pick the illustration below that represents your wheel stud pattern and measure as described below each illustration. Common bolt patterns have 4, 5, 6, or 8 lug holes, while less common have 3, 7, or 10 lug bolt patterns. Bolt patterns in 4- 6- and 8-lug can be measured by going from the center of a stud to the center of the stud directly across from it. Measuring the wheel bolt pattern on your vehicle is necessary if you are in the market for aftermarket wheels. You can estimate the measurement by using a straight line from the backside of one hole to the center of the third bolt hole. Bolt patterns can be 4-, 5-, 6-, or 8-lug holes. If you need the 4, 6 or 9 Lug page look here How to measure 4, 6 or 8 lug wheel bolt pattern If you want a more accurate approach check out the Wheel Bolt Circle Calculators Once you’ve selected them you should see that there is a 2 bolt hole gap on both sides. That measurement is your bolt pattern diameter. Thousands of how to measure bolt pattern reviews, same day shipping. If you have 5 or 7 studs, you will have to take an extra step to determine the bolt pattern. Now, measure the center of the two bolt holes you selected. Bolt circles are measured in both inches and millimeters, therefore you may hear a bolt pattern referred to as both (i.e. You measure from the BACK of one lug (skip to next lug as shown) and to the CENTER of that lug. bolt pattern the arrangement of the bolt holes on a wheel. Measure Bolt Hole Center to Bolt Hole Center. In order to find the right wheel for your trailer, you will need to know the bolt pattern. Learn how to determine the bolt pattern on your trailer. You can estimate the measurement unless accurately measured using a bolt pattern gauge. The number you see will be the actual measurement of the bolt pattern. A 4 bolt wheel with 100mm between opposite bolt holes would be written as 4/100. Interchangeable Wheel / Bolt Pattern Chart for Cars, Trucks, Vans, SUVs, Motorhomes, RVs, ATVs, UTVs and Trailers . The bolt pattern spacing can also be measured with a regular tape measure. say the number of lug holes/studs on measurement, such as : 5 on 4.5 or 6 on 135mm. The first thing you want to compare is how many lug nuts or studs are on your vehicle and then how many are on the rim. 4-lug bolt patterns are measured in a straight line from center to center of the two bolt holes directly across from each other. Trailer wheel hub patterns can be defined by the number of bolts or lugs per wheel and the diameter of the circle that the bolts are arranged on. A 5-lug bolt pattern is a little more difficult to measure, but you can easily do that by following the diagram below. The bolt circle is the circle determined by the positions of the bolts; the center of every bolt lies on the circumference of the bolt circle. Extend the ruler directly across from the bolt to the space across from the bolt, located in the center of two bolts or lugs, to determine the measurement. Therefore, take a few minutes to measure the wheel bolt pattern so that you purchase the correct wheels for your car. 6-lug wheels are measured like 4-lug wheels. Lug patterns are measured in either Inches or Millimeters. To measure 5 lug pattern wheels, hold the end of the ruler or tape measure to the center of one bolt. This means that should you ask for a 1/2-inch x 12 x 4-inch Grade 2 Hex Bolt Head with a 1-inch thread, the request is universally understood by bolt manufacturers. 6-lug wheels are measured like 4-lug wheels. That will give you the bolt mounting diameter. 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