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How do I know what size casters I need?

The Complete Guide to help you determine what Caster type you need for your cart, equipment, or furniture

One of the primary considerations for determining what Size of Casters you will need is the total load used by the cart, furniture, or equipment. This means you must find out how much the equipment can handle and the maximum weight you plan to add. Once you determine the total load, divide that amount by the number of casters you plan on using. Typically, most people will use four casters on most applications. For example, let's say a total load of your cart will weigh 2,000 lbs. You now need to divide 2,000 lbs by four casters, which equals the 500 lbs capacity needed per Caster.


Now that we have discussed determining the total load capacity needed per Caster, it's time for the next step.

  • Step #2: If there are currently casters installed, measure the overall mounting plate size. This will let you know which caster category you need to be in. The most common mounting plate sizes are 2-3/8" x 3-5/8" Overall, 4" x 4-1/2" Overall, 3-1/8" x 4-1/8" Overall, and on some more oversized casters, 4-1/2" x 6-1/4", and it goes up from there. If your casters do not have a plate and have a stem caster instead, find out if you have a Threaded Stem, Grip Ring Stem, or Expanding Rubber Adapter Stem.

  • Step #3: Now that you have determined the mounting type and size, find a wheel within that category based on your application. Use our Caster Wheel Application Guide to help you find the best wheel characteristics for your application.

  • Step #4: Now that you have found the best wheel type, it's time to determine whether the wheel has a load capacity that matches or exceeds what you need. Typically, the larger the wheel, the heavier the load capacity and the easier it is to roll.

  • Step #5: Hopefully, you have found the perfect Caster for your application by now. Add the quantity to your cart and proceed with the checkout process. CasterHQ ships the same or the next day, and all orders ship from our Texas warehouse.
    If you need help from the Caster Experts here at Caster Headquarters, contact us by phone toll-free at 1-844-439-4335 (844-HD-Wheel) Monday thru Friday between 8 am-5 pm (CST), LiveChat with one of our Caster Agents using the LiveChat below on the bottom right-hand side of our site, or email us your application information and questions at info@casterhq.com. We will gladly get you the perfect Caster for your cart, furniture, or equipment! Thanks for visiting and reading our guide on determining what Size Caster you need!