{"product_id":"shimano-di2-sm-jc41-junction-b","title":"Shimano Di2 SM-JC41 Junction B","description":"\u003cp data-path-to-node=\"2\"\u003e\u003cb data-path-to-node=\"2\" data-index-in-node=\"0\"\u003eThe Hidden Hub.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"3\"\u003eThe SM-JC41 is a simple yet vital piece of the Di2 puzzle. It features four ports that utilize \u003cb data-path-to-node=\"3\" data-index-in-node=\"95\"\u003eEW-SD50\u003c\/b\u003e wires, allowing you to centralize all your connections in one protected location. By housing these connections internally, you protect your system's digital signals from road spray, grit, and accidental impact, ensuring your shifting remains perfect even in the most grueling conditions.\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003e\u003cb data-path-to-node=\"4\" data-index-in-node=\"0\"\u003eWhy the SM-JC41 is a Build Necessity:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"5\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,0,0\"\u003e\u003cb data-path-to-node=\"5,0,0\" data-index-in-node=\"0\"\u003eCentralized Internal Routing:\u003c\/b\u003e Designed to be hidden inside the frame's tubes (usually the down tube or bottom bracket shell), creating a completely clean aesthetic with no visible wires between the main components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,0\"\u003e\u003cb data-path-to-node=\"5,1,0\" data-index-in-node=\"0\"\u003eFour-Port Versatility:\u003c\/b\u003e Equipped with four SD50 E-Tube ports, typically used to connect:\u003c\/p\u003e\n\u003col start=\"1\" data-path-to-node=\"5,1,1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,1,0,0\"\u003eThe \u003cb data-path-to-node=\"5,1,1,0,0\" data-index-in-node=\"4\"\u003eFront Derailleur\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,1,1,0\"\u003eThe \u003cb data-path-to-node=\"5,1,1,1,0\" data-index-in-node=\"4\"\u003eRear Derailleur\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,1,2,0\"\u003eThe \u003cb data-path-to-node=\"5,1,1,2,0\" data-index-in-node=\"4\"\u003eBattery\u003c\/b\u003e (Internal or External)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,1,3,0\"\u003eThe \u003cb data-path-to-node=\"5,1,1,3,0\" data-index-in-node=\"4\"\u003eJunction A\u003c\/b\u003e (Cockpit connection)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,2,0\"\u003e\u003cb data-path-to-node=\"5,2,0\" data-index-in-node=\"0\"\u003eUltra-Compact Design:\u003c\/b\u003e Small enough to fit through almost any standard bottom bracket shell or frame port, making the assembly process easier for mechanics and home builders.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,3,0\"\u003e\u003cb data-path-to-node=\"5,3,0\" data-index-in-node=\"0\"\u003eWeather-Sealed Reliability:\u003c\/b\u003e Because it is designed for internal use, it provides an extra layer of protection for your digital connections, ensuring a consistent signal through rain, mud, and stream crossings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,4,0\"\u003e\u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"0\"\u003eUniversal 10\/11Speed Compatibility:\u003c\/b\u003e Compatible with all E-Tube Di2 systems using SD50 wires, including \u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"104\"\u003eDura-Ace 9070\/9150\u003c\/b\u003e, \u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"124\"\u003eUltegra 6770\/6870\/8050\u003c\/b\u003e, and \u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"152\"\u003eGRX 815\u003c\/b\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,5,0\"\u003e\u003cb data-path-to-node=\"5,5,0\" data-index-in-node=\"0\"\u003eZero Maintenance:\u003c\/b\u003e Once installed and connected, the SM-JC41 requires no power or configuration. It is a passive, reliable hub that simply works.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003eModel:\u003c\/b\u003e SM-JC41\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"\u003eType:\u003c\/b\u003e Junction B (Internal)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,2,0\"\u003e\u003cb data-path-to-node=\"7,2,0\" data-index-in-node=\"0\"\u003ePorts:\u003c\/b\u003e 4 x SD50 E-Tube ports\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,3,0\"\u003e\u003cb data-path-to-node=\"7,3,0\" data-index-in-node=\"0\"\u003eCompatibility:\u003c\/b\u003e 10\/11Speed Di2 Systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,4,0\"\u003e\u003cb data-path-to-node=\"7,4,0\" data-index-in-node=\"0\"\u003eMounting:\u003c\/b\u003e Internal (No hardware required)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,5,0\"\u003e\u003cb data-path-to-node=\"7,5,0\" data-index-in-node=\"0\"\u003eWeight:\u003c\/b\u003e ~4g\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"8\"\u003e\n\u003cp data-path-to-node=\"9,0\"\u003e\u003cb data-path-to-node=\"9,0\" data-index-in-node=\"0\"\u003eThe Alegro Perspective:\u003c\/b\u003e The SM-JC41 is the \"unsung hero\" of a clean Di2 build. It’s a tiny, inexpensive part, but it’s what makes internal routing possible. In the shop, we always remind riders that if they are upgrading a frame to 11Speed Di2, this is the one part they \u003ci data-path-to-node=\"9,0\" data-index-in-node=\"272\"\u003ecannot\u003c\/i\u003e forget. It’s what turns a collection of parts into a cohesive, high-performance machine.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003eSeamless Integration. Protected Connections. Simplify your Build with Shimano.\u003c\/b\u003e\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":48591953035487,"sku":"ISMJC41","price":50.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/5452\/3103\/files\/660088-02_1.jpg?v=1773522955","url":"https:\/\/alegrocycles.com\/products\/shimano-di2-sm-jc41-junction-b","provider":"Alegro Cycles","version":"1.0","type":"link"}