{"product_id":"hella-355122532-vented-brake-rotor-300mm-6x112-67mm-hub","title":"Hella 355122532 Vented Brake Rotor 300mm 6x112 67mm Hub","description":"\u003cp class=\"nvn-hero\"\u003eThe Hella 355122532 is a vented, one-piece disc brake rotor built from zinc-coated gray cast iron. It measures 300mm across the outside diameter with a 22mm nominal thickness, a 6 x 112mm bolt pattern, and a 67mm hub bore. Vented cooling helps shed heat on repeated stops, and the zinc coating keeps surface rust down between drives.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Hella 355122532 is a vented disc brake rotor for passenger-vehicle disc brakes, and it's the kind of part you want to get right the first time. Brakes aren't where you cut corners. This one is a one-piece casting in gray cast iron with a zinc coating on the non-friction surfaces, so it fights the surface rust that makes a rotor look ugly on the shelf and streaks your wheels after the first wet drive.\u003c\/p\u003e\n\u003cp\u003eLet's talk dimensions, because with a rotor the numbers are everything. This one runs 300 millimeters across the outside diameter, 22 millimeters of nominal thickness, and stands 68.20 millimeters tall. It uses a 6 x 112 millimeter wheel bolt pattern and seats on a 67 millimeter hub bore. Those figures match a lot of European passenger cars, and the 6 x 112 pattern with a 67mm center bore is a signature of many Mercedes-Benz applications. Before you order, cross-check the part number against your year and model, because a rotor that's a millimeter off in thickness or bolt circle simply won't work.\u003c\/p\u003e\n\u003cp\u003eThe vented design is the important bit. A vented rotor has two friction faces separated by internal vanes that pump air through the disc as the wheel turns. That airflow pulls heat out of the casting, which matters any time you're braking hard and often, like a long grade with a loaded car or stop-and-go on a hot day. Heat is the enemy of braking. Let a rotor cook and you get brake fade, that soft pedal feeling when the pads and disc get too hot to bite. The 22mm thickness here gives the vanes room to move air and gives the rotor enough mass to soak up heat between stops.\u003c\/p\u003e\n\u003cp\u003eGray cast iron is the standard material for a reason. It handles heat well, it damps vibration so you get less squeal, and it wears in a predictable way against the pad. The zinc coating is there for the parts of the rotor you don't want rusting: the hat, the edges, the vent gaps. The friction faces will clean themselves off with the first few stops as the pads scrub the coating away, which is normal and exactly what you want.\u003c\/p\u003e\n\u003cp\u003eThis rotor is sold as a single. Good practice is to replace rotors in axle pairs, both fronts or both rears together, so the car brakes evenly side to side. If you're doing a brake job, plan on fresh pads at the same time. New pads on a worn rotor, or an old glazed pad on a fresh rotor, never bed in cleanly and you'll hear about it. Order two of these for the axle, grab your pads and hardware, and do the job once.\u003c\/p\u003e\n\u003cp\u003eInstall is straightforward for anyone who's turned a wrench on brakes. Pull the caliper and bracket, slide the old rotor off, and clean the hub face down to bare metal so the new rotor sits flat. Any rust or crud on the hub throws off runout and gives you a pulsing pedal down the road. A dab of anti-seize on the hub register, not the friction face, keeps the next rotor from fusing on. Torque the caliper bracket to spec, fit your pads, and pump the pedal up before you roll.\u003c\/p\u003e\n\u003cp\u003eBedding in matters. Once it's on, find a safe stretch of road and make a series of moderate-to-firm stops from speed, easing off before you come to a full halt, then let the brakes cool. This transfers an even layer of pad material onto the disc and sets up smooth, quiet braking. Skip it and you risk uneven deposits that show up as a shudder later.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Anyone replacing worn or warped rotors on a vehicle that runs the 6 x 112mm pattern and a 67mm hub. It's a straight replacement-grade part with the vented cooling and corrosion-resistant coating you'd expect from Hella. It's not a drilled or slotted performance rotor, and it doesn't need to be for daily driving. What it does is give you a clean, true friction surface and reliable stopping, which is exactly what a brake rotor is supposed to do. If your part number matches, it's an easy call.\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 pumps air through internal vanes to shed brake heat and resist fade on repeated stops\u003c\/li\u003e\n  \u003cli\u003e300mm outside diameter with 22mm nominal thickness gives the mass to soak up heat between stops\u003c\/li\u003e\n  \u003cli\u003e6 x 112mm wheel bolt pattern matches many European passenger-car applications\u003c\/li\u003e\n  \u003cli\u003e67mm hub bore seats cleanly on the matching hub register for true, low-runout mounting\u003c\/li\u003e\n  \u003cli\u003e68.20mm overall height sets the friction face at the correct offset\u003c\/li\u003e\n  \u003cli\u003eOne-piece gray cast iron casting damps vibration for quieter braking and predictable wear\u003c\/li\u003e\n  \u003cli\u003eZinc coating protects the hat, edges, and vent areas from surface rust between drives\u003c\/li\u003e\n  \u003cli\u003eSold as a single so you can match quantities to your axle, replacing rotors in pairs\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 vehicles use the 6 x 112mm bolt pattern and 67mm hub?\u003c\/summary\u003e\n    \u003cp\u003eThat combination shows up on a lot of European passenger cars, and it's a common Mercedes-Benz specification. Always confirm the Hella 355122532 against your exact year and model by part number before ordering, since the bolt circle and hub bore have to match precisely.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a vented or solid rotor?\u003c\/summary\u003e\n    \u003cp\u003eIt's a vented rotor. Internal vanes pump air through the disc as the wheel spins, which pulls heat out of the casting and helps resist brake fade during repeated hard stops.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the rotor's dimensions?\u003c\/summary\u003e\n    \u003cp\u003eIt measures 300 millimeters outside diameter, 22 millimeters nominal thickness, and 68.20 millimeters overall height, with a 67 millimeter hub bore.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs the rotor sold individually or as a pair?\u003c\/summary\u003e\n    \u003cp\u003eIt's sold as a single. We recommend replacing rotors in axle pairs so the car brakes evenly side to side, so most jobs need two.\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 protects the hat, edges, and vent areas from surface rust. The friction faces clean off during the first few stops as the pads scrub the coating away, which is normal.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need new pads when I install this rotor?\u003c\/summary\u003e\n    \u003cp\u003eIt's good practice. Fresh pads bed cleanly to a new rotor, while an old glazed pad on a new disc can cause noise and uneven wear. Plan on pads and hardware along with the rotor.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the rotor made of?\u003c\/summary\u003e\n    \u003cp\u003eGray cast iron with a zinc coating. Cast iron handles heat well and damps vibration for quieter, more predictable braking.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this rotor come with pads or hardware?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is the rotor only, sold as a single. You'll need pads and any caliper hardware separately.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I bed in the new rotor?\u003c\/summary\u003e\n    \u003cp\u003eAfter install, make a series of moderate-to-firm stops from speed on a safe road, easing off before a full stop, then let the brakes cool. This lays down an even layer of pad material for smooth, quiet braking.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy does the hub need to be clean before installing?\u003c\/summary\u003e\n    \u003cp\u003eRust or debris on the hub face keeps the rotor from seating flat, which creates runout and a pulsing pedal. Clean the hub to bare metal so the new rotor sits true.\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 355122532 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\u003e355122532\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e4082300573206\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDisc Type\u003c\/th\u003e\n\u003ctd\u003eVented\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003eOne Piece\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\u003eHeight\u003c\/th\u003e\n\u003ctd\u003e68.20 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHub Bore Size\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\u003eQuantity\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 vehicles use the 6 x 112mm bolt pattern and 67mm hub?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"That combination shows up on a lot of European passenger cars, and it's a common Mercedes-Benz specification. Always confirm the Hella 355122532 against your exact year and model by part number before ordering, since the bolt circle and hub bore have to match precisely.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a vented or solid rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a vented rotor. Internal vanes pump air through the disc as the wheel spins, which pulls heat out of the casting and helps resist brake fade during repeated hard stops.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the rotor's dimensions?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It measures 300 millimeters outside diameter, 22 millimeters nominal thickness, and 68.20 millimeters overall height, with a 67 millimeter hub bore.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is the rotor sold individually or as a pair?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's sold as a single. We recommend replacing rotors in axle pairs so the car brakes evenly side to side, so most jobs need two.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the zinc coating for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The zinc coating protects the hat, edges, and vent areas from surface rust. The friction faces clean off during the first few stops as the pads scrub the coating away, which is normal.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need new pads when I install this rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's good practice. Fresh pads bed cleanly to a new rotor, while an old glazed pad on a new disc can cause noise and uneven wear. Plan on pads and hardware along with the rotor.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the rotor made of?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Gray cast iron with a zinc coating. Cast iron handles heat well and damps vibration for quieter, more predictable braking.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does this rotor come with pads or hardware?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. This is the rotor only, sold as a single. You'll need pads and any caliper hardware separately.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I bed in the new rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"After install, make a series of moderate-to-firm stops from speed on a safe road, easing off before a full stop, then let the brakes cool. This lays down an even layer of pad material for smooth, quiet braking.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why does the hub need to be clean before installing?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Rust or debris on the hub face keeps the rotor from seating flat, which creates runout and a pulsing pedal. Clean the hub to bare metal so the new rotor sits true.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Hella","offers":[{"title":"Default Title","offer_id":45064668840029,"sku":"2008767","price":75.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_895968c1-3e0e-427a-b62a-a26a8ccce729.jpg?v=1789608504","url":"https:\/\/nvnmarine.com\/products\/hella-355122532-vented-brake-rotor-300mm-6x112-67mm-hub","provider":"NVN Marine","version":"1.0","type":"link"}