{"product_id":"shimano-sm-jc40-di2-external-frame-junction-box-4-port","title":"Shimano SM-JC40 Di2 External Frame Junction Box 4-Port","description":"\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: 'Proxima Nova W08 Reg', 'Helvetica Neue', sans-serif; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;\"\u003eShimano Di2 Frame Junction Box\u003c\/p\u003e\n\u003cul class=\"bullet-points bullet-points-collapsed\" style=\"box-sizing: border-box; margin-top: 0px; margin-bottom: 10px; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: 'Proxima Nova W08 Reg', 'Helvetica Neue', sans-serif; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;\"\u003e\n\u003cli class=\"model-bullet\" style=\"box-sizing: border-box; margin-bottom: 0.5em;\"\u003eFrame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount\u003c\/li\u003e\n\u003cli class=\"model-bullet\" style=\"box-sizing: border-box; margin-bottom: 0.5em;\"\u003eAll Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions\u003c\/li\u003e\n\u003cli class=\"model-bullet\" style=\"box-sizing: border-box; margin-bottom: 0.5em;\"\u003eUse Di2 system checker to update component firmware from http:\/\/e-tubeproject.shimano.com\/\u003c\/li\u003e\n\u003cli class=\"product-bullet\" style=\"box-sizing: border-box; margin-bottom: 0.5em;\"\u003eMounts underneath the bottom bracket shell\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":47196942958754,"sku":"ISMJC40","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0714\/0373\/3154\/files\/Screenshot2026-04-23at11.36.34AM.png?v=1776969416","url":"https:\/\/twistedspokeyuma.com\/products\/shimano-sm-jc40-di2-external-frame-junction-box-4-port","provider":"Twisted Spoke","version":"1.0","type":"link"}