{"product_id":"tie-down-engineering-wobble-roller-bunk-assembly-86550-36-in-galvanized-steel-cross-bar-boat-trailer-roller-kit","title":"Tie Down Engineering Wobble Roller Bunk Assembly 86550, 36 in. Galvanized Steel Cross Bar, Boat Trailer Roller Kit","description":"\u003cp\u003eThe Tie Down Engineering Wobble Roller Bunk Assembly (Part 86550) replaces fixed trailer bunks with a roller system that cradles the hull and lets it roll smoothly onto and off the trailer, reducing hull scuffing and easing launch and retrieval, especially in shallow water or at low-clearance ramps. The assembly is built around a 36 in. Galvanized steel cross bar that mounts across the trailer frame and carries 2 wobble roller arms, each fitted with a wobble roller. Because the wobble rollers pivot and self-align to the hull's shape, they maintain even contact across curved sections of the hull instead of the single contact line typical of straight rollers, spreading the load and reducing wear points.\u003c\/p\u003e\u003cp\u003eThe cross bar and arm layout is expandable to 4 arms for boats that need additional roller support along the bunk, and the assembly ships with all mounting hardware required to install the included components onto a compatible trailer frame. The galvanized steel construction resists corrosion in the wet, salt-exposed environment typical of boat trailers. This assembly is compatible with Tie Down's Wobble Roller add-on components, allowing the roller support to be extended as needed.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Tie Down Engineering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 86550\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Wobble Roller Bunk Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Bar Length:\u003c\/strong\u003e 36 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Bar Material:\u003c\/strong\u003e Galvanized steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Roller Arms:\u003c\/strong\u003e 2 wobble roller arms (expandable to 4 arms)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Rollers:\u003c\/strong\u003e 4 rollers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 28 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 081628865509\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Boat Trailer Rollers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUniversal boat trailer bunk application; expandable from 2 to 4 wobble roller arms to suit the hull being supported. Compatible with Tie Down's Wobble Roller Front Assembly (Part 86574) for added front cross member support and the Wobble Roller Assembly add-on (Part 86551) for extending roller coverage.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are specified for this part.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the Tie Down Engineering Wobble Roller Bunk Assembly (Part 86550)?\u003c\/strong\u003e Part 86550 includes a 36 in. Galvanized steel cross bar, 2 wobble roller arms, 4 rollers, and all mounting hardware needed to install those components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Wobble Roller Bunk Assembly be expanded to more rollers?\u003c\/strong\u003e Yes, the 86550 assembly ships with 2 wobble roller arms but the cross bar layout is expandable to 4 arms for boats needing additional roller support.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the cross bar made of?\u003c\/strong\u003e The 36 in. Cross bar on the 86550 Wobble Roller Bunk Assembly is made of galvanized steel for corrosion resistance in wet trailering conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the cross bar on this assembly?\u003c\/strong\u003e The cross bar included with the Tie Down Wobble Roller Bunk Assembly 86550 measures 36 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this assembly compatible with other Tie Down wobble roller parts?\u003c\/strong\u003e Yes, Part 86550 is compatible with Tie Down's Wobble Roller Assembly add-on (Part 86551) and the Wobble Roller Front Assembly (Part 86574), which are sold separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between Part 86550 and Part 86551?\u003c\/strong\u003e Part 86550 is the full Wobble Roller Bunk Assembly with the cross bar, 2 roller arms, 4 rollers, and mounting hardware, while Part 86551 is an add-on with 2 additional wobble rollers and a pivoting roller arm and does not include mounting hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Wobble Roller Bunk Assembly include mounting hardware?\u003c\/strong\u003e Yes, all mounting hardware needed to install the 86550 assembly's cross bar, roller arms, and rollers is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Wobble Roller Bunk Assembly weigh?\u003c\/strong\u003e The Tie Down Engineering Wobble Roller Bunk Assembly, Part 86550, weighs 28 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a wobble roller do compared to a fixed bunk?\u003c\/strong\u003e A wobble roller pivots and self-aligns to the hull's curve, maintaining even contact as the boat rolls onto or off the trailer, which the fixed bunks this assembly replaces cannot do.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 86550 assembly designed for a specific trailer frame size?\u003c\/strong\u003e The 36 in. Galvanized cross bar mounts across the trailer frame; frame-specific bracket fitment is covered separately by the Wobble Roller Front Assembly, Part 86574, for 3x3 or 3x4 frames.\u003c\/p\u003e","brand":"Tie Down Engineering","offers":[{"title":"Default Title","offer_id":49017659162843,"sku":"T-D-86550","price":227.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Tie-Down_T-D-86550_1__43431.1739462761.500.750.jpg?v=1785329218","url":"https:\/\/www.goodvibesmarina.com\/products\/tie-down-engineering-wobble-roller-bunk-assembly-86550-36-in-galvanized-steel-cross-bar-boat-trailer-roller-kit","provider":"Good Vibes Marina","version":"1.0","type":"link"}