{"product_id":"8720828042755-kmc-bosch-narrowwide-chainrings","title":"KMC Narrow Wide Direct Mount Chainring Compatible with Bosch BDU38\/34","description":"\u003cmeta content=\"text\/html; charset=utf-8\" http-equiv=\"Content-Type\"\u003e\u003cp\u003e\u003cspan\u003e\u003cul\u003e\n\u003cli\u003ePerfectly matched to KMC chains\u003c\/li\u003e\n\u003cli\u003eSpecifically desgined to be compatible with Bosch Drive Units BDU38\/34\u003c\/li\u003e\n\u003cli\u003eNarrow-wide tooth profile for precise interaction between chain and chainring\u003c\/li\u003e\n\u003cli\u003eMaximum efficiency which saves battery\u003c\/li\u003e\n\u003cli\u003eDirrect Mount interface\u003c\/li\u003e\n\u003c\/ul\u003eThe KMC e-bike chainring for Bosch BDU38 \u0026amp; BDU34 systems. is purpose-built for direct mount installation, eliminating the need for a separate spider and creating a cleaner, more integrated connection to the motor unit. This precise engagement significantly improves chain retention, particularly on 1x e-Bike drivetrain systems with pronounced chain lines. Also compatible with Bosch BDU4, BDU37 and BDU31 systems, however, please note the difference in chainline. Constructed from quality High-Tensile Steel to withstand the additional torque and load that comes with motor assistance, it features the same narrow-wide tooth profile found across KMC's range, with alternating tooth widths providing secure chain retention even under sustained power delivery. The steel construction and precise tooth engagement work together to deliver maximum drivetrain efficiency, helping preserve battery life by minimising unnecessary friction. Perfectly matched to KMC chains, with the e1EPT chain specifically recommended for optimal performance, it covers e1, e8, e9, e10, e11 and e12 speed configurations, though it is not compatible with 12 or 13-speed flattop chains. A dependable, purpose-built choice for Shimano Steps EP riders who want a drivetrain that performs as reliably as the motor driving it. Features Perfectly matched with KMC Chains High-Tensile Steel High efficiency, saves battery Extreme durability, highest precision Simple conversion Technical Specifications Compatible with Bosch BDU38 \u0026amp; BDU34 systems Chainline: 55mm Direct mount (without spider) Maximum efficiency which saves battery Perfectly matched to KMC chains e1 \/ e8 \/ e9 \/ e10 \/ e11 \/ e12 Suitable for use with all 1-8 speed chains 1\/2 x 3\/32” and 9-12 speed chains 11\/128\" Not compatible with 12-\/13-speed flattop chains\u003cbr\u003eItem Length: 214\u003cbr\u003ePart Type: Bike Spares\u003cbr\u003eSize: 55mm Chainline, 34T\u003cbr\u003eType: Chainrings\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Rarewaves","offers":[{"title":"Default Title","offer_id":58746840678774,"sku":"8720828042755","price":23.01,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0092\/7504\/8033\/files\/orig_15766200_30934769_20260917075212.jpg?v=1789678925","url":"https:\/\/www.rarewaves.com\/products\/8720828042755-kmc-bosch-narrowwide-chainrings","provider":"Rarewaves.com","version":"1.0","type":"link"}