{"product_id":"4-inch-boat-trailer-spool-roller-fits-1-2-inch-or-5-8-inch-shaft","title":"4-inch Boat Trailer Spool Roller – Fits 1\/2-inch or 5\/8-inch Shaft","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis heavy-duty \u003cstrong\u003e4-inch Boat Trailer Spool Roller\u003c\/strong\u003e is designed for boat trailer applications, providing smooth and stable support for your boat without scratching or causing damage. The spool design allows for easy loading and unloading of various boat hull types.\u003c\/p\u003e\n\u003cp\u003eManufactured in the USA by C.H. Yates Rubber, this is a direct aftermarket replacement for corresponding spool rollers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade from heavy-duty black rubber to prevent scratching your boat's hull.\u003c\/li\u003e\n\u003cli\u003eInstalls on a standard roller shaft within a 4-inch roller bracket.\u003c\/li\u003e\n\u003cli\u003eAvailable in 1\/2-inch or 5\/8-inch inner diameter variants to fit your shaft size.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eC.H. Yates Rubber\u003c\/td\u003e\n        \u003ctd\u003e23738\u003c\/td\u003e\n        \u003ctd\u003eFor 1\/2-inch Bore\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eC.H. Yates Rubber\u003c\/td\u003e\n        \u003ctd\u003e23739\u003c\/td\u003e\n        \u003ctd\u003eFor 5\/8-inch Bore\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eBoat Trailer Spool Roller\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eHeavy-duty black rubber\u003c\/dd\u003e\n  \u003cdt\u003eInner Diameter Options\u003c\/dt\u003e\n\u003cdd\u003e1\/2-inch or 5\/8-inch\u003c\/dd\u003e\n  \u003cdt\u003eOverall Length\u003c\/dt\u003e\n\u003cdd\u003e4 inches (101.6 mm)\u003c\/dd\u003e\n  \u003cdt\u003eOutside Diameter\u003c\/dt\u003e\n\u003cdd\u003e3.5 inches (88.9 mm)\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eMounts on roller shaft in roller bracket\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eDesign\u003c\/dt\u003e\n\u003cdd\u003eSpool configuration with reinforced ends\u003c\/dd\u003e\n  \u003cdt\u003eManufacturer\u003c\/dt\u003e\n\u003cdd\u003eC.H. Yates Rubber\u003c\/dd\u003e\n  \u003cdt\u003eCountry of Origin\u003c\/dt\u003e\n\u003cdd\u003eUSA\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Boat Trailer Spool Roller (Yates 23738 for 1\/2-inch bore or Yates 23739 for 5\/8-inch bore)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eThis roller mounts on a roller shaft of either 1\/2-inch or 5\/8-inch diameter, corresponding to the roller variant you purchase. The assembly is secured inside a 4-inch roller bracket, with the shaft typically held in place by Pal Nuts hammered onto each end.\u003c\/p\u003e\n\u003cp\u003eRecommended hardware (not included):\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eRoller Shaft (5.5\" to 6.25\" long with a diameter matching your roller's bore)\u003c\/li\u003e\n    \u003cli\u003ePal Nuts (matching the shaft's diameter)\u003c\/li\u003e\n    \u003cli\u003e4-inch Galvanized Roller Bracket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between the 1\/2\" and 5\/8\" versions?\u003c\/summary\u003e\u003cp\u003eThe only difference is the inner diameter (bore) of the hole running through the center. Choose the model that matches the diameter of your trailer's roller shaft.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this black rubber mark my boat's hull?\u003c\/summary\u003e\u003cp\u003eThis roller is made from non-marking, heavy-duty rubber designed specifically to protect your boat's gelcoat and finish during loading and transport.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know when to replace my rollers?\u003c\/summary\u003e\u003cp\u003eInspect your rollers regularly for signs of cracking, splitting, or excessive wear. A worn-out roller can become flat, losing its shape and failing to spin freely, which can damage your hull. Replace any roller that shows visible signs of degradation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs a load capacity rating available?\u003c\/summary\u003e\u003cp\u003eWhile a specific load rating from the manufacturer is not provided, these rollers are designed for use on a wide range of standard recreational boat trailers. Load is distributed across multiple rollers; ensure your trailer's overall setup meets your boat's weight requirements.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat tools are needed for installation?\u003c\/summary\u003e\u003cp\u003eTypically, you will need a hammer to install the Pal Nuts on the end of the shaft and wrenches to adjust the roller bracket on the trailer's crossmember.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this for a keel roller?\u003c\/summary\u003e\u003cp\u003eThis is a spool-style roller, designed to guide the sides of the hull. While it could be used on a keel in some custom setups, dedicated keel rollers are generally recommended for supporting the boat's keel.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. It is manufactured in an ISO 9002 facility and batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the shipping speed \u0026amp; cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the warranty \u0026amp; return policy?\u003c\/summary\u003e\u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717886251323,"sku":"19BT024","price":18.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/4_inches_Boat_Trailer_Spool_Roller_by_1-2_inches_Shaft_-_JLM_MARINE-8288033.jpg?v=1762937358","url":"https:\/\/seasierra.com\/products\/4-inch-boat-trailer-spool-roller-fits-1-2-inch-or-5-8-inch-shaft","provider":"SeaSierra","version":"1.0","type":"link"}