Shop. Bearing Suffixes. The wheels and axles themselves are less likely to break, but smaller internal parts such as wheel bearings are at great risk of becoming badly damaged. You may need to know the size of your tires for various reasons, such as for a spare tire or when purchasing wheels, rims, or snow tires. With something like a Suburban or Expedition, you need bars if your loaded trailer weighs more than 7000 pounds. How to grease trailer wheel bearings with Dexter's E-Z Lube grease fitting. The optimal ball height for towing U-Haul trailers is 18½ to 18¾ inches. The characters on a number plate need to be a certain height and size. chevron_left. Cat. Don't forget to always size up for safety! menu close. Most trailer hitch balls are 2-1/2” - 3” high. The differences between these bearings are detailed below. The coupler for the 1 7/8" ball is rated at a 2,000 lb. A towing vehicle with GVW of 3500kg or lower is restricted as to the size of trailer it may tow. Trailer hitch ball mounts come in a wide variety of sizes, shapes and styles to accommodate virtually any towing setup. The trailer weight should not exceed its gross vehicle weight rating. Determine the towing capacity of the tow hitch on your travel trailer. Shop. Measure the height to the top of the hitch cup. Choosing the Correct Ball Mount. What size trailers generally work well with ball mounts? If not, are new chains required? Subtract the height of your trailer hitch ball from the coupler. If the trailer is designed to weigh more than 3500kg, other tow couplings are used, such … If your trailer has brakes, attach the safety line to the tow vehicle. However, measuring the tire size manually with a tape measure will not give you accurate results. Pet Pros. Don't forget to always size up for safety! Gross weight of towing vehicle and size of trailer. Now measure the height to the top of your hitch receiver tube. Visit our KONG Size Chart to find the right KONG for your dog. Make sure the full weight of the trailer is now on the ball hitch. This is measured from the ground to the middle of the hitch ball, prior to connecting the trailer. In this example we will subtract 3 inches from 18 inches and have a total of 15 inches. To determine which shank you need… However, shank sizes are standardized to four basic options: 1-1/4", 2", 2-1/2" and 3". Learn. Two of the most important factors in selecting a trailer hitch are Gross Trailer Weight (GTW) and Tongue Weight (TW). To haul a trailer, you need to make sure your vehicle is capable of hauling, and you need to properly hitch the trailer. Pet Pros Login / Register. In order for a trailer to be safely towed, it needs to be as level as possible as that will minimize the strain on the connection between the trailer and the hitch. The adjustability measurement for the shanks is measured from the inside top of the receiver to the base of the hitch ball. I attach my sway bars before I completely lower my trailer onto the hitch. Common ball sizes are 1 7/8, 2, or 2 5/16 inches. Align the hitch and ball, then lower the trailer hitch down over the ball. Advertisement. The lower you take it, the harder it is to get the sway bars ratcheted into place. If there are different levels between the bumper and the trailer, you can match them up more effectively with a drop or a rise hitch. Also known as a trailer ball or coupler ball, the trailer ball attaches to the ball mount and comes in many sizes. I bought one too thin, so the trailer dealer told me I could not fill my enclosed trailer to capacity of 8000lbs. Dog. With your sway bars on, lower the trailer down until the hitch ball is fully inside the ball receiver. To choose the right hitch ball for your application, you need to know a few things about the trailer that you tow and your ball mount. The shank size of the ball hitch must match the receiver tube size of your trailer hitch. Using your partner, check to make sure all lights on your trailer are working including turn signals and brakes. Does your trailer already have safety chains? Equal-i-zer Hitch Shanks are built from the highest-grade of American steel. Once you have determined the dimensions of your bearing, you can use our bearing search tool to find the correct bearing. There's more: the ball mount and ball you have is only rated for a Class II trailer, less than 3.500 lbs. Most trailers list hitch ball size (diameter) and maximum towing capacity on the tongue, coupler, or frame. If you exceed your trailers maximum weight you are putting more stress on the wheels and axles than they are designed to take. If the hitch ball height of your tow vehicle needs to be lower or higher, U-Haul has a variety of different sized and adjustable ball mounts available to achieve the appropriate height. e.g. A travel trailer must be pulled by an appropriate size vehicle that has enough power to overcome hills and dales. To calculate the needed hitch size, figure that the trailer will weigh its gross vehicle rated weight when you are towing it. Read leaflet INF104 : vehicle registration numbers and number plates - height and size measurement, for more information. Make sure you know your cargo's gross trailer weight and tongue weight before you start. Step 2: 18 inches. The difference between the two is how much drop you need, but subtract a couple of inches to allow for the rear end of your truck sagging while loaded. Once you measured your bearing, you can use our search to find the correct bearing size. You can find the gross weight rating in the trailer's owner's manual, or on a nomenclature plate mounted to the side of the trailer. Let’s Play. Richard ... the shank's length, and the size of the circular piece of metal between the ball and shank. (23 inches minus 15 inches) The results are: Step 1: 23 inches. The second mistake people often make is loading the trailer unevenly. Ball Diameter: Check the top of the trailer coupler for the size of the ball diameter required. When purchasing a trailer make sure that your vehicle can easily pull the gross weight. Hitch Ball. Recreational and light commercial hitch balls come in a variety of sizes including 1 7/8″, 2″, 2 5/16″ and occasionaly 3″. Meanwhile the heaviest trailer they offer, the Auto Transport, will require at minimum a 5,000 pound capacity hitch ball and may need a higher weight capacity depending on the total combined weight of the vehicle being towed plus the trailer. Crank the trailer jack all the way up and swing it out of the way if applicable, you don’t want this dragging or scraping on the road. Items you will need. Instead, you need to consider the tongue weight and gross vehicle weight (GVW) of your trailer and the size and weight ratings of your tow vehicle. The size is usually stamped there. In the Product Options field, select hitch ball size, either 1 7/8" or 2", then choose the size you need for the tongue mount. Many manufacturers label the ball size right on the coupler. 1 /4. Leveling your trailer: Your trailer needs to be level fore and aft so the weight is distributed properly and the trailer handles the way it should, but the trailer hitch receiver on your particular tow vehicle is unlikely to be at the same height as the trailer tongue. The trailer couple will mount and lock into place over the ball. Method 2 of 4: Determine your GTW and TW Capacities 1. chevron_right. To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. Ball sizes are determined by the weight of the trailer. Select a Ball Mount With the Right Rise or Drop. Don't forget to check on the shank size of the ball. The 2" ball coupler gives you a choice among 3,500, 5,000, or 6,000 lb. Close the latch and insert the safety pin. But the manager at the trailer dealer informs you the ball mount and ball on your truck aren't suitable: you need a larger-diameter 2 5/16" ball instead of the 2" ball you showed up with. The most common size is 2-1/4 inch wide like the # T4071600-500 that you referenced. The 50mm ball coupling is the mainstay for trailers up to 3500kg ATM. There are three main types of bearing - roller bearings, ball bearings and needle bearings. Quick Search. GTW (gross trailer weight). Sizes include 1-7/8”, 2”, 2-5/16”, and 3” (in rare cases). Visit our KONG Size Chart to find the right KONG for your dog. Ball Diameter and Capacity. Look for a weight rating on the top or underside of the hitch. I have a Class 4 hitch and I didn't know I needed a certain size shank on the 2 5/16" ball. Measures 12" long and fits 2" trailer hitch receivers. Just because your vehicle can pull the trailer empty, does not mean it’s a good fit. TW (tongue weight). Select a Locale: United States. Lower the Trailer and Close the Hitch Ball Receiver. Set the trailer's jack so the trailer is more or less level. Coupler socket size (What diameter ball do you need?) Everything you need to know about the humble ball coupling ... in Europe and Australia the ISO standard 50mm coupling is the prevailing size, while the 1.75in (44.45mm) ball is also used in some countries such as New Zealand. Luckily, your tire size is easy to figure out. In general lighter trailers use smaller hitch balls. Using a weight distribution hitch becomes more necessary the closer your trailer weight gets to being the same as your tow vehicle weight (1:1 ratio). Cross the safety chains, and attach them to the truck. Plug in the lights, and run a full check to make sure they're all working. First, you should determine the GTW and TW of your trailer when … But you do need bars (or a higher-rated hitch) if the weight of your loaded trailer exceeds the weight-carrying rating of your present hitch. "The most common type of hitch is the bumper pull, also known as a drag or tagalong trailer… the trailer’s tongue fits over a ball hitch that juts out from the vehicle’s frame at the rear of the vehicle… bumper pulls are smaller than goosenecks; this means a bumper pull trailer usually costs less than a gooseneck. Determine the heaviest weight of the trailer being towed. In this example and 8 inch drop required on your ball mount to make the trailer level. What size ball mount do you need? 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