Extend the ruler directly across the center of the wheel to the adjacent lug or bolt to determine the measurement. To get 5 and 7 lug bolt patterns it's not so simple. 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. A 5-lug bolt pattern is a little more difficult to measure, but you can easily do that by following the diagram below. 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"). say the number of lug holes/studs on measurement, such as : 5 on 4.5 or 6 on 135mm. If your trailer wheel hubs have 5 lug bolts, measuring is slightly different. If you don't know whether the BCD is in inches or millimeters, it's best to have a tape measure that has both scales on it. You measure the inside space and add one diameter, or outside distance and subtract one diameter. To find your bolt pattern, measure the distance as accurately as possible and then find the corresponding bolt pattern in the conversion table below. 4 5 6 8 Lug Wheel Bolt Pattern Gauge Tool Quick Measuring Measurement Black. The correct terminology for referencing bolt patterns is to . Free delivery on eligible orders. Bolt patterns can be 4-, 5-, 6-, or 8-lug holes. Buy Shiwaki Bolt Pattern Measuring Tool Gauge Ruler - Universal Gauge 4-5 - 6 - And 8- Lug Bolt Patterns - Measure Wheel/Turned Over To Measure Studs On Vehicle at Amazon UK. How to measure the bolt pattern on a 5 lug wheel. 2.Can be used to measure a wheel or turned over to measure studs on a vehicle. A larger vehicle will come with more bolts and larger bolt circle. An example of a measurement for a 4 lug pattern is stated as 4 on 4 (inches). Rims with 4, 6, or 8 lugs all use the same method for measuring. Common mistake is to measure from the center on one hole to the center of the third hole. 3.Measures most common 4, 5, 6 and 8 lug bolt patterns including: 4-Lug (4.25" to 5.5" & 98mm to 140mm) 5-Lug (4.5" to 5.5" & 100mm to 150mm) Bolt Patterns for Wheels with Even Bolt Holes (4, 6, or 8 Holes) To measure between the holes on a wheel with an even number of holes, simply measure from the center of one bolt hole to the center of its opposite to determine the diameter of the lug pattern. The diagram indicates the proper measuring methods. (pitch circle diameter) or bolt pattern diameter will be the distance measured. 5 Lug : Measure from the center on one hole to the BACK of the third hole. In the same way we may calculate the following bolt pattern in inches, 5x5, to metric, which will be 5 times 25.4 = 127 (bolt pattern = 5x127). The 4 X 4 Bolt Pattern or Pitch Circle Diameter (PCD) is made up of the stud count (4) and the bolt circle measurement (4), the notional circle determined by the center position of the studs.. How To Measure 4 Lug Bolt Patterns. So if you get 4.5 inches, you have a 4X4.5 bolt pattern (four on four and a half). This is the correct way to measure a 5-lug bolt pattern. Pull it across to the bolt on the exact opposite side, covering the middle opening with your measuring tape. Nov 24, 2017 - Common bolt patterns are 4, 5, 6, or 8 lug holes. The diagram (upper, left) indicates the proper measuring methods. Most trailers on the road have a 4, 5 or 6 Lug pattern. A bolt circle of 4x100 would indicate a 4-lug pattern on a circle with a diameter of 100mm. 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