{"product_id":"boat-trailer-bow-roller-blue-polyurethane-fits-most-boat-trailers","title":"Boat Trailer Bow Roller (Blue Polyurethane) – Fits Most Boat Trailers","description":"\u003csection\u003e\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\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis high-quality polyurethane \u003cstrong\u003e4-inch boat trailer roller bow stop\u003c\/strong\u003e provides smooth and stable support for your boat without scratching or causing damage. It is universally designed for winch posts on most boat and PWC trailers, mounting easily with a standard 1\/2\" shaft hole.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct replacement for JLM Marine's 4\" Blue Polyurethane Bow Roller, LoadRite's 4\" Yellow Polyvinyl Bow Stop Roller, and the Ultimate 4\" x 7\" Polyurethane Bow Stop.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMounts on winch post\/stand with a 1\/2\" shaft (sold separately).\u003c\/li\u003e\n  \u003cli\u003eFormulated to be UV-resistant and non-marking to protect your boat's hull.\u003c\/li\u003e\n  \u003cli\u003eIncludes the bow roller only; mounting hardware is not included.\u003c\/li\u003e\n\u003c\/ul\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJLM Marine\u003c\/td\u003e\n        \u003ctd\u003e4\" Blue Polyurethane Bow Roller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eLoadRite\u003c\/td\u003e\n        \u003ctd\u003e4\" Yellow Polyvinyl Bow Stop Roller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eUltimate\u003c\/td\u003e\n        \u003ctd\u003e4\" x 7\" Polyurethane Bow Stop\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your trailer compatibility in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eApplication\u003c\/th\u003e\n        \u003cth\u003eType\u003c\/th\u003e\n        \u003cth\u003eMounting\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\u003eBoat Trailers\u003c\/td\u003e\n        \u003ctd\u003eBow Stop\u003c\/td\u003e\n        \u003ctd\u003e1\/2\" shaft mounting hole\u003c\/td\u003e\n        \u003ctd\u003eProvides cushioning between boat and trailer\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePWC Trailers\u003c\/td\u003e\n        \u003ctd\u003eBow Stop\u003c\/td\u003e\n        \u003ctd\u003e1\/2\" shaft mounting hole\u003c\/td\u003e\n        \u003ctd\u003eUniversal fitment for personal watercraft\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 Bow Roller\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eMounting on winch post\/stand\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003ePolyurethane\/Polyvinyl\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlue (also available in Yellow)\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eOverall Length: 7\" (178mm), Inner Length: 4\" (102mm)\u003c\/dd\u003e\n  \u003cdt\u003eMounting Hole\u003c\/dt\u003e\n\u003cdd\u003e0.5\" (12.7mm)\u003c\/dd\u003e\n  \u003cdt\u003eOverall Width\u003c\/dt\u003e\n\u003cdd\u003e4\" (102mm) (at widest point)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eUV resistant, non-marking, shock absorbing\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 Bow Roller (Blue Polyurethane)\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003eRoller only (mounting hardware sold separately)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eSecure your boat and trailer on a level surface, ensuring the boat cannot roll backward.\u003c\/li\u003e\n  \u003cli\u003eRemove the existing hardware securing your old bow roller, taking care not to lose any washers or cotter pins you may need to reuse.\u003c\/li\u003e\n  \u003cli\u003eSlide the old roller off the winch post shaft. Clean the shaft and inspect for wear or damage.\u003c\/li\u003e\n  \u003cli\u003eAlign the new bow roller with the 1\/2\" mounting hole and slide it onto the shaft.\u003c\/li\u003e\n  \u003cli\u003eReinstall the mounting hardware and tighten it securely, ensuring the roller spins freely but has minimal side-to-side play.\u003c\/li\u003e\n  \u003cli\u003eTest the fit by carefully winching the boat forward until its bow rests firmly against the new roller.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm this roller will fit my trailer?\u003c\/summary\u003e\u003cp\u003eMeasure the inner length and shaft diameter of your current roller. This model is designed for a 4-inch wide bracket and a 1\/2-inch diameter shaft. If your dimensions match, it should fit correctly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does \"non-marking\" polyurethane mean?\u003c\/summary\u003e\u003cp\u003eNon-marking means the material is specifically designed to not leave scuffs, scratches, or color residue on your boat's hull, which can be a common issue with lower-quality rubber or vinyl rollers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs polyurethane better than a standard rubber roller?\u003c\/summary\u003e\u003cp\u003ePolyurethane offers superior durability compared to traditional rubber. It is highly resistant to UV rays, saltwater, oil, and impacts, and it won't crack or split over time, providing longer service life and better protection for your boat.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhen should I replace my bow roller?\u003c\/summary\u003e\u003cp\u003eInspect your bow roller regularly. Look for deep cracks, splits, flat spots, or signs of material degradation. If the roller no longer spins freely or shows significant wear, it's time for a replacement to ensure your boat remains properly supported.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this for a different application besides a bow stop?\u003c\/summary\u003e\u003cp\u003eWhile designed as a bow stop, this roller can potentially be used in other applications where a 4-inch roller with a 1\/2-inch shaft is needed. However, verify the load and environmental conditions are suitable before using it for unintended purposes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat hardware do I need for installation?\u003c\/summary\u003e\u003cp\u003eThis listing includes the roller only. You will typically need a 1\/2-inch diameter shaft or bolt, washers, and a nut or cotter pin. It's often best to reuse your existing hardware if it is in good condition.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\u003cp\u003eCovered 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 (unused \u0026amp; in 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":50717886415163,"sku":"19BT015","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/4_inches_X_7_inches_Boat_Trailer_Roller_Polyurethane_Blue_by_1-2_inches_Shaft_-_JLM_MARINE-8287992.png?v=1762937366","url":"https:\/\/seasierra.com\/products\/boat-trailer-bow-roller-blue-polyurethane-fits-most-boat-trailers","provider":"SeaSierra","version":"1.0","type":"link"}