{"product_id":"lancisism-roof-box-u-bolt-clamps-kit-4-pc-85mm-u-brackets-with-lock-nuts-straps-corrosion-resistant-vehicle-safe-fit","title":"Lancisism Roof Box U-Bolt Clamps Kit, 4-Pc 85mm U-Brackets with Lock Nuts \u0026 Straps — Corrosion-Resistant, Vehicle-Safe Fit","description":"\u003cp\u003e\u003cstrong\u003eThese four heavy-duty U-bolt clamps and full accessory kit secure a rooftop cargo box to your vehicle quickly and reliably.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen you need a dependable way to fasten a roof cargo box without replacing factory rails, this Lancisism kit supplies metal U-brackets, rubber gaskets, plastic back plates, lock nuts and straps sized for most common roof box anchor points. Built from corrosion-resistant metal and paired with protective rubber and plastic components, the set is intended to reduce movement, protect vehicle finish and simplify fitment on cars and vans with through-bolt mounting holes.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these U-bolt clamps attach a roof box to my car?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward and designed for basic hand tools. You position the box, feed each U-shaped bolt up through the box floor, add the rubber washer and plastic backing plate beneath the roof, then tighten the lock nuts down to clamp the assembly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlace roof box centrally on the roof; open lid to access mounting holes.\u003c\/li\u003e\n  \u003cli\u003eInsert U-bolts from inside the box and push through the vehicle roof opening.\u003c\/li\u003e\n  \u003cli\u003eFit rubber washers and plastic support plates under the roof and secure with heavy lock nuts.\u003c\/li\u003e\n  \u003cli\u003ePass supplied straps through bracket gaps and tighten for extra restraint.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key measurements and materials I should check before buying?\u003c\/h3\u003e\n\u003cp\u003eConfirm your roof box's bolt spacing and hole diameter so the parts fit properly. The kit’s U-bolts have an internal width of about 83–85mm and a center-to-center screw spacing near 98mm, with an M8\/5\/16in threaded bolt diameter.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInner bracket width: ~83mm (3.27in) — fits many universal roof boxes.\u003c\/li\u003e\n  \u003cli\u003eCenter-to-center screw spacing: ~98mm (3.8in).\u003c\/li\u003e\n  \u003cli\u003eBolt diameter: M8 \/ 5\/16in — standard roof box thickness compatibility.\u003c\/li\u003e\n  \u003cli\u003eMaterials: iron (metal U-bolts), rubber gaskets and plastic backing plates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these clamps protect my vehicle and withstand outdoor conditions?\u003c\/h3\u003e\n\u003cp\u003eThe combination of metal hardware with rubber and plastic components is intended to minimize abrasion against the roof and resist corrosion from road exposure. Rubber gaskets cushion contact points while plastic backing plates distribute pressure to avoid concentrated dents or scratches.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRubber gaskets shield paint and increase friction for a firmer hold.\u003c\/li\u003e\n  \u003cli\u003ePlastic support boards spread load to prevent localized stress marks.\u003c\/li\u003e\n  \u003cli\u003eIron U-bolts offer robust clamping strength for highway driving loads.\u003c\/li\u003e\n  \u003cli\u003eLock nuts secure the assembly and resist loosening during travel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this kit for? If you own a rooftop cargo box with through-bolt mounting holes and want a compact, reusable mounting solution that avoids permanent roof modifications, this Lancisism 4-piece U-bolt kit is a practical choice. It works well for drivers who transport luggage, sports gear or camping equipment and need a low-cost, serviceable mounting option that can be stored in the trunk when not in use. Always measure your box and mounting hole spacing before ordering, and consult an installation video or a professional if you’re unsure about fit or roof compatibility.\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: Will these U-bolts fit my existing roof box holes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check that your roof box hole spacing is near 98mm center-to-center and the internal bracket width about 83–85mm; the bolts are M8\/5\/16in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need special tools to install the kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No special tools: basic wrenches for M8 lock nuts and a screwdriver for strap routing are usually sufficient.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Lancisism","offers":[{"title":"Default Title","offer_id":48087082238110,"sku":"B0CJ3DD4CY","price":33.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/lancisism-front-packaging-roof-clamps.jpg?v=1785916199","url":"https:\/\/northtrailauto.ca\/products\/lancisism-roof-box-u-bolt-clamps-kit-4-pc-85mm-u-brackets-with-lock-nuts-straps-corrosion-resistant-vehicle-safe-fit","provider":"North Trail Auto","version":"1.0","type":"link"}