{"product_id":"curt-2-5-16-trailer-hitch-ball-15-000-lb-chrome-1-1-4-x-2-5-8-shank-heavy-duty","title":"CURT 2-5\/16\" Trailer Hitch Ball 15,000 lb — Chrome, 1-1\/4\" x 2-5\/8\" Shank, Heavy‑Duty","description":"\u003cp\u003e\u003cstrong\u003eCURT 40078 is a heavy‑duty 2-5\/16-inch chrome trailer hitch ball rated to tow up to 15,000 pounds with a 1-1\/4\" x 2-5\/8\" shank for secure mounting.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis precision‑made tow ball combines hot‑forged high‑strength steel, a corrosion‑resistant chrome finish, and fine‑threaded hardware to deliver stable, long‑lasting towing performance. Designed and tested to meet VESC safety specifications, the 40078 is built to pair with Class 5 hitches and commonly used 2-5\/16\" couplers on utility, boat, and RV trailers.\u003c\/p\u003e\n\n\u003ch3\u003eWill this hitch ball fit my trailer coupler and ball mount?\u003c\/h3\u003e\n\u003cp\u003eThe CURT 40078 uses a 2-5\/16\" diameter ball so it mates directly with any trailer coupler sized for 2-5\/16\". The shank measures 1-1\/4\" in diameter and 2-5\/8\" long, which matches many standard Class 5 ball mounts and drop shanks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBall diameter: 2-5\/16\" to fit 2-5\/16\" couplers\u003c\/li\u003e\n  \u003cli\u003eShank size: 1-1\/4\" diameter, 2-5\/8\" length\u003c\/li\u003e\n  \u003cli\u003eCompatible with most Class 5 hitches when mount thickness allows\u003c\/li\u003e\n  \u003cli\u003eCheck mount hole diameter and thickness before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow strong and durable is the CURT 40078 for heavy towing?\u003c\/h3\u003e\n\u003cp\u003eThis hitch ball is rated for a gross trailer weight of 15,000 pounds and is manufactured from hot‑forged steel to withstand high towing loads. Chrome plating protects the surface from corrosion, while fine threads and included hardware improve clamping strength under repeated use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated capacity: 15,000 lb gross trailer weight\u003c\/li\u003e\n  \u003cli\u003eConstruction: hot‑forged high‑strength steel\u003c\/li\u003e\n  \u003cli\u003eFinish: chrome plating for rust resistance\u003c\/li\u003e\n  \u003cli\u003eHardware: zinc‑plated hex nut and helical lock washer included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the installation and maintenance considerations?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires securing the shank through the ball mount and torquing the nut to the specified value for a safe clamp. Routine maintenance includes inspecting the ball surface, threads and hardware for wear or corrosion and reapplying lubricant to prevent galling.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequired torque: tighten to manufacturer‑specified value (450 lb‑ft referenced for fine‑thread hold)\u003c\/li\u003e\n  \u003cli\u003eUse the supplied zinc nut and lock washer for secure fastening\u003c\/li\u003e\n  \u003cli\u003eInspect before each tow for wear, rust, or uneven surface\u003c\/li\u003e\n  \u003cli\u003eKeep ball surface clean and lightly lubricated to reduce wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this tow ball meet safety and testing standards?\u003c\/h3\u003e\n\u003cp\u003eCURT designs the 40078 to meet U.S. VESC testing standards, ensuring consistent manufacturing and safety margins appropriate for high‑capacity towing. These tests validate material integrity, thread performance, and load capacity to provide confidence on the road.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTested to VESC (Vehicle Equipment Safety Commission) specifications\u003c\/li\u003e\n  \u003cli\u003eQuality control focused on material, threads, and plating\u003c\/li\u003e\n  \u003cli\u003eIntended for use with properly rated hitch assemblies and couplers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The CURT 40078 is aimed at drivers who tow heavy loads—truck, SUV, or van owners pulling large utility trailers, boat trailers, fifth‑wheel adapters with appropriate mounts, or heavy RV\/camper loads—who need a rugged, well‑tested 2-5\/16\" hitch ball. Choose this model when you require a high‑capacity, corrosion‑resistant tow ball that matches industry sizing and comes with the hardware needed for a secure installation. Always confirm trailer and hitch ratings and follow vehicle manufacturer guidelines before towing.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What size coupler fits this hitch ball?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The CURT 40078 has a 2-5\/16\" diameter ball designed to fit any 2-5\/16\" trailer coupler.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the hardware included for installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — a zinc‑plated hex nut and helical lock washer are supplied for secure installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"CURT","offers":[{"title":"Default Title","offer_id":48085638742174,"sku":"B08CFMRR8M","price":46.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/curt-40078-front-packaging.jpg?v=1785875927","url":"https:\/\/northtrailauto.ca\/products\/curt-2-5-16-trailer-hitch-ball-15-000-lb-chrome-1-1-4-x-2-5-8-shank-heavy-duty","provider":"North Trail Auto","version":"1.0","type":"link"}