How To measure bolt patterns on trailer wheels

🛠️ How to Measure Bolt Patterns on Trailer Wheels

Understanding how to measure bolt patterns is essential for ensuring your trailer wheels match up correctly with your hubs. Whether you’re replacing old wheels or upgrading your trailer’s setup, accurate bolt pattern measurements are critical to fit, safety, and overall performance.

Bolt patterns refer to the number of lug holes and the diameter of the circle they form. For example, a “5 on 4.5” pattern means five lug holes evenly spaced on a 4.5-inch diameter circle. The measuring process depends on how many lugs your wheel has:

• 4, 6, or 8 lugs: Measure from the center of one stud to the center of the one directly across from it.
  
  
• 5 lugs: Measure from the center of one stud to the outer edge of the furthest opposite stud—not center to center.
  
  

Use a ruler or caliper and take the measurement with the wheel off the trailer to avoid inaccuracies. Even being off by a small margin can cause issues with fit and safety. The image above provides a helpful visual guide for common trailer lug patterns and how to determine a five-hole bolt circle with precision.

At Dukes A&W, we carry a wide range of trailer wheels, hubs, and accessories to match standard bolt patterns. Our team is here to help if you’re unsure about your trailer’s fitment or need expert advice.

For a deeper dive into bolt pattern standards and compatibility charts, check out this comprehensive bolt pattern guide from eTrailer.

Knowing how to measure bolt patterns correctly can save you time, money, and potential road trouble. Whether you’re shopping for replacements or outfitting a new trailer, start with accurate measurements and let Dukes A&W help you find the perfect match.