Purchasing a Trailer Hub Cap

If you want to give your trailer a custom look, you can't go wrong with a new set of wheel caps. These are easy to fit and help keep dirt and debris off the lug nuts. Plus, they're great for protecting the nut from rust and corrosion.

Many trailer owners choose to use dexter hubcap  rather than a more expensive kind of bearing protector, such as a Bearing Buddy. If you look around the boat ramps, you'll see a lot of trailers with these simple, inexpensive hub covers. However, experts agree that they aren't as good as a more costly kind of hub protector.

One problem is that they are prone to blowing off because the trailer studs rotate inside the hub. In some cases, these rotations cause a castle nut or cotter pin to loosen. Also, a dust cap may fall off if it's removed to check or replace the bearings or when the wheel is re-greased. There are also instances of a cotter pin touching the inside of the dust cap, pushing it off.
If a trailer is left unattended for long periods of time, the grease that coats the studs can dry out and cause corrosion. This is why some boat trailer manufacturers have switched to oil-filled hubs. The advantage is that the oil circulates through centrifugal force as the wheel spins, keeping the studs properly coated.

Having an oil-filled hub also makes it easier to check the condition of the bearings. If the bearings are contaminated with black grease, it's easy to remove the hubcap and re-lubricate them. The disadvantages of oil-filled hubs, according to Shoreland'r, include excessive heat buildup inside the hub assembly and the possibility that water could enter if the wheel is dropped in cold water.
If you decide to purchase a new trailer hub cap, it's important to consider the make and model of the trailer, get more info  here.

 Although many aftermarket hubcaps work with multiple types of vehicles, it's important to find a product that fits your trailer wheels. Then, you'll be able to protect your investment and extend the life of the seal and bearings. To get started, measure the stud size of your trailer's hub assembly. Common sizes are 8 of 5/8'' and 8 of 3/4'' studs. Visit this page to learn more on the subject:  https://en.wikipedia.org/wiki/Hubcap  .