{"product_id":"ritchey-logic-e-cartridge-upper-headset","title":"Ritchey Logic-E ZS44\/28.6 or IS42\/28.6 Cartridge Upper Headset","description":"\u003cp\u003eThe \u003cstrong\u003eRitchey Logic-E Cartridge Upper Headset\u003c\/strong\u003e is an upper assembly for 28.6mm threadless steerers, offered as a \u003cstrong\u003eZS44\/28.6 press-fit\u003c\/strong\u003e or an \u003cstrong\u003eIS42\/28.6 drop-in\u003c\/strong\u003e version. It is designed for Shimano STEPS and Di2 builds that route the cable through the frame.\u003c\/p\u003e\u003cp\u003eWhat sets it apart is that it handles that routing \u003cstrong\u003ewithout modifying the fork or frame\u003c\/strong\u003e. It runs on a \u003cstrong\u003esealed cartridge bearing\u003c\/strong\u003e and weighs 44g.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRiders building or servicing a \u003cstrong\u003eShimano STEPS or Di2\u003c\/strong\u003e bike with the cable routed through the frame\u003c\/li\u003e\n\u003cli\u003eMechanics who need a ZS44 or IS42 upper for that routing without drilling or modifying parts\u003c\/li\u003e\n\u003cli\u003eConsider a different upper if your frame uses another upper S.H.I.S. code\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003e\u003cstrong\u003eWhat to Look For\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper fitment first:\u003c\/strong\u003e choose ZS44\/28.6 (press-fit) or IS42\/28.6 (drop-in) to match your frame.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteerer:\u003c\/strong\u003e 28.6mm threadless only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper only:\u003c\/strong\u003e pair it with a lower that matches your frame and fork.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eCable routing:\u003c\/strong\u003e the Logic-E is built to pass a Shimano STEPS or Di2 cable through the headset area, so the cable can enter the frame \u003cstrong\u003ewithout frame or fork modification\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBearing:\u003c\/strong\u003e a \u003cstrong\u003esealed cartridge\u003c\/strong\u003e bearing in black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTwo fitments, one price:\u003c\/strong\u003e ZS44 press-fit and IS42 drop-in versions cover press-fit and drop-in frames at \u003cstrong\u003e44g\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eRider Intent Summary\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiggest strengths:\u003c\/strong\u003e Routes STEPS\/Di2 cable without modifying the frame or fork; sealed cartridge bearing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTradeoffs:\u003c\/strong\u003e Upper only; limited to ZS44\/28.6 and IS42\/28.6 frames.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat makes it different:\u003c\/strong\u003e Purpose-built for Shimano STEPS and Di2 cable routing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003e\u003cstrong\u003eVictory's Take\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eAt Victory Bicycle Studio we reach for the Logic-E when a STEPS or Di2 build needs clean internal routing and the frame and fork have to stay untouched.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUpper (S.H.I.S.): ZS44\/28.6 press-fit or IS42\/28.6 drop-in\u003c\/li\u003e\n\u003cli\u003eSteerer: 28.6mm threadless\u003c\/li\u003e\n\u003cli\u003eBearing type: Sealed cartridge\u003c\/li\u003e\n\u003cli\u003eWeight: 44g\u003c\/li\u003e\n\u003cli\u003eColor: Black\u003c\/li\u003e\n\u003cli\u003ePart number: 33030817002 (ZS44), 33030817003 (IS42)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ritchey","offers":[{"title":"ZS44 Press Fit","offer_id":53538053849395,"sku":"33030817002","price":47.95,"currency_code":"USD","in_stock":true},{"title":"IS42 Drop In","offer_id":53538053882163,"sku":"33030817003","price":47.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0981\/3685\/0739\/files\/567f49b5d5338f6c62bf2307638f508f7c9dca68-optimized-900-762.webp?v=1782256725","url":"https:\/\/victorybicyclestudio.com\/products\/ritchey-logic-e-cartridge-upper-headset","provider":"Victory Bicycle Studio","version":"1.0","type":"link"}