{"product_id":"hella-355118942-vented-disc-brake-rotor-300mm-6x112","title":"Hella 355118942 Vented Disc Brake Rotor 300mm 6x112","description":"\u003cp class=\"nvn-hero\"\u003eThe Hella 355118942 is a vented, one-piece disc brake rotor sized at 300mm outside diameter with 22mm of thickness. It runs a 6 x 112 millimeter bolt pattern and a 67mm center bore, and the zinc-coated gray cast iron shrugs off the surface rust that plagues bare rotors. Sold individually.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Hella 355118942 is a vented, one-piece disc brake rotor built for daily driving and honest stopping power. It measures 300 millimeters across the outside diameter, runs 22 millimeters of nominal thickness, and stands 57.10 millimeters tall from the mounting face to the top of the hat. If your vehicle calls for a 300mm rotor on a 6 x 112 millimeter bolt pattern with a 67 millimeter center bore, this is the size you're looking at.\u003c\/p\u003e\n\u003cp\u003eVented is the key word here. The rotor is cast with internal cooling vanes between the two friction faces, so air pulls through the disc as the wheel spins. That airflow carries heat away from the pads and the rotor surface, which is exactly what you want on a heavier vehicle, in stop-and-go traffic, or on a long grade where the brakes stay busy. Solid rotors run hotter and fade sooner. A vented disc this size gives you more thermal headroom and a more consistent pedal feel when things heat up.\u003c\/p\u003e\n\u003cp\u003eIt's a one-piece design, meaning the hat and the friction ring are cast as a single piece of gray cast iron rather than bolted together. Fewer parts, nothing to work loose, and a straightforward install. Gray cast iron is the standard material for brake rotors because it sheds heat well and gives the pad a stable, predictable surface to bite into. Hella finishes the non-friction areas, the hat and the edges, with a zinc coating. That coating fights the surface rust that shows up fast on bare cast iron, especially around the wheel bolts and the center bore where you can see it through the wheel. The friction faces stay bare, the way they should, so the pads seat cleanly.\u003c\/p\u003e\n\u003cp\u003eFitment comes down to three numbers. The 6 x 112 millimeter bolt pattern has to match your hub. The 67 millimeter center bore has to slip over your hub register. And the 300 millimeter diameter with 22 millimeter thickness has to match the caliper and carrier your vehicle came with. Check those against your application before you order. This rotor is sold as a single, so for an even, balanced job you'll want two, one for each side of the axle. Brakes work in pairs, and mixing a fresh rotor with a worn one on the same axle pulls the car to one side under braking.\u003c\/p\u003e\n\u003cp\u003eWhen you install it, this is a good time to fit fresh pads. A new rotor and old, glazed pads never seat well together, and you lose the benefit of the new disc. Clean the hub face so the rotor sits flat, torque the caliper bracket and wheel bolts to your vehicle's spec, and then bed the brakes in. Bedding means a series of moderate stops to transfer an even layer of pad material onto the rotor face. Skip that step and you invite uneven deposits, which is what most people feel as a shudder through the pedal later on.\u003c\/p\u003e\n\u003cp\u003eSpeaking of thickness, the 22 millimeter figure is the nominal, new dimension. Every rotor has a minimum thickness below which it should be replaced, and that discard figure is cast or stamped into the hat. As the pads wear the rotor down over the years, measure it with a micrometer and compare against that stamped number. Once it's at or near the limit, don't resurface it, replace it. A rotor that's too thin can't handle heat and is far more likely to warp.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Anyone doing a straightforward brake refresh on a vehicle that runs the 6 x 112 pattern and a 300mm vented disc. It's a sensible, correctly sized replacement rotor from a name that's been making braking hardware for a long time. Match the specs, buy a pair, fit good pads, bed them in, and you're back on the road with a firm pedal.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eVented rotor design with internal cooling vanes pulls air through the disc to shed heat and resist brake fade\u003c\/li\u003e\n  \u003cli\u003e300 millimeter outside diameter with 22 millimeter nominal thickness for a correctly sized vented replacement\u003c\/li\u003e\n  \u003cli\u003e6 x 112 millimeter wheel bolt pattern and 67 millimeter center bore for a direct hub fit on matching vehicles\u003c\/li\u003e\n  \u003cli\u003eOne-piece gray cast iron casting keeps the hat and friction ring as a single unit for a simple, secure install\u003c\/li\u003e\n  \u003cli\u003eZinc coating on the hat and edges fights the surface rust that bare cast iron picks up fastest\u003c\/li\u003e\n  \u003cli\u003e57.10 millimeter overall height sets the correct offset from the mounting face to the friction surface\u003c\/li\u003e\n  \u003cli\u003eSold individually so you can order the exact quantity your job needs, two for a balanced axle\u003c\/li\u003e\n  \u003cli\u003eHella part number 355118942 for a straightforward cross-reference against your current rotor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Hella Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the dimensions of the Hella 355118942 rotor?\u003c\/summary\u003e\n    \u003cp\u003eIt's 300 millimeters in outside diameter, 22 millimeters of nominal thickness, and 57.10 millimeters in overall height from the mounting face to the top of the hat.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat bolt pattern and hub size does it use?\u003c\/summary\u003e\n    \u003cp\u003eThe wheel bolt pattern is 6 x 112 millimeters and the center bore, or hub size, is 67 millimeters. Both need to match your vehicle's hub for a proper fit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a vented rotor?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's a vented, one-piece design with internal cooling vanes cast between the two friction faces to pull heat out of the brake as the wheel turns.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come as a pair or a single?\u003c\/summary\u003e\n    \u003cp\u003eIt's sold as a single rotor. For an even, balanced brake job you'll want two, one for each side of the axle.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the zinc coating for?\u003c\/summary\u003e\n    \u003cp\u003eThe zinc coating goes on the non-friction areas, the hat and the edges, to slow the surface rust that bare gray cast iron develops quickly. The friction faces stay bare so the pads can seat.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the minimum thickness before I should replace it?\u003c\/summary\u003e\n    \u003cp\u003eThe 22 millimeter figure is the nominal new thickness. The minimum, or discard, thickness is cast or stamped into the rotor hat. Measure with a micrometer and replace the rotor once it reaches that stamped limit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShould I replace the brake pads at the same time?\u003c\/summary\u003e\n    \u003cp\u003eIt's the right move. A new rotor and old, glazed pads don't seat well together. Fitting fresh pads with a new rotor gives you the full benefit of the new disc and a cleaner bed-in.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes the rotor need to be bedded in after installation?\u003c\/summary\u003e\n    \u003cp\u003eYes. After install, do a series of moderate stops to transfer an even layer of pad material onto the rotor face. Skipping the bed-in can leave uneven deposits that you feel later as pedal shudder.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know it will fit my vehicle?\u003c\/summary\u003e\n    \u003cp\u003eMatch three numbers to your application: the 6 x 112 millimeter bolt pattern, the 67 millimeter center bore, and the 300 millimeter diameter with 22 millimeter thickness against your caliper and carrier. If all three match, you're good.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the advantage of a one-piece design?\u003c\/summary\u003e\n    \u003cp\u003eThe hat and friction ring are cast as a single piece of gray cast iron rather than bolted together. That means fewer parts, nothing to work loose, and a simpler install.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eHella 355118942 Vented Disc Brake Rotor\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHella\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e355118942\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e4082300574296\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRotor Design\u003c\/th\u003e\n\u003ctd\u003eVented\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eOne-Piece Design\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWheel Bolt Pattern\u003c\/th\u003e\n\u003ctd\u003e6 x 112 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutside Diameter\u003c\/th\u003e\n\u003ctd\u003e300 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eNominal Thickness\u003c\/th\u003e\n\u003ctd\u003e22 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOverall Height\u003c\/th\u003e\n\u003ctd\u003e57.10 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHub Size (Center Bore)\u003c\/th\u003e\n\u003ctd\u003e67 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eZinc Coated Gray Cast Iron\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the dimensions of the Hella 355118942 rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's 300 millimeters in outside diameter, 22 millimeters of nominal thickness, and 57.10 millimeters in overall height from the mounting face to the top of the hat.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What bolt pattern and hub size does it use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The wheel bolt pattern is 6 x 112 millimeters and the center bore, or hub size, is 67 millimeters. Both need to match your vehicle's hub for a proper fit.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a vented rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It's a vented, one-piece design with internal cooling vanes cast between the two friction faces to pull heat out of the brake as the wheel turns.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come as a pair or a single?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's sold as a single rotor. For an even, balanced brake job you'll want two, one for each side of the axle.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the zinc coating for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The zinc coating goes on the non-friction areas, the hat and the edges, to slow the surface rust that bare gray cast iron develops quickly. The friction faces stay bare so the pads can seat.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the minimum thickness before I should replace it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The 22 millimeter figure is the nominal new thickness. The minimum, or discard, thickness is cast or stamped into the rotor hat. Measure with a micrometer and replace the rotor once it reaches that stamped limit.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Should I replace the brake pads at the same time?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the right move. A new rotor and old, glazed pads don't seat well together. Fitting fresh pads with a new rotor gives you the full benefit of the new disc and a cleaner bed-in.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does the rotor need to be bedded in after installation?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. After install, do a series of moderate stops to transfer an even layer of pad material onto the rotor face. Skipping the bed-in can leave uneven deposits that you feel later as pedal shudder.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know it will fit my vehicle?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Match three numbers to your application: the 6 x 112 millimeter bolt pattern, the 67 millimeter center bore, and the 300 millimeter diameter with 22 millimeter thickness against your caliper and carrier. If all three match, you're good.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the advantage of a one-piece design?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The hat and friction ring are cast as a single piece of gray cast iron rather than bolted together. That means fewer parts, nothing to work loose, and a simpler install.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Hella","offers":[{"title":"Default Title","offer_id":45065227632733,"sku":"2008800","price":55.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_aec2f11e-21b0-4944-8257-4a83dcacfa38.jpg?v=1789618126","url":"https:\/\/nvnmarine.com\/products\/hella-355118942-vented-disc-brake-rotor-300mm-6x112","provider":"NVN Marine","version":"1.0","type":"link"}