{"product_id":"wolf-tooth-headset-upper-knock-block-28-6-8mm-black","title":"Wolf Tooth Headset Upper Knock Block - 28.6 8mm Black","description":"Wolf Tooth Precision Headsets for Trek Knock Block are machined in the USA out of aircraft grade aluminum with superior sealing for protection against the elements. Available in a variety of colors to add some style to your bike. These upper headsets are for Trek frames with molded-in internal bearing cups.\u003cli\u003eDesigned to work with Trek's Knock Block system\u003c\/li\u003e\u003cli\u003eThe top cap on these headsets have unique raised features that key to Knock Block compatible stems (made by Bontrager\u003c\/li\u003e\u003cli\u003eIf spacers are needed you will need to use special Knock Block compatible spacers with notch features\u003c\/li\u003e\u003cli\u003eThis product is the upper headset only\u003c\/li\u003e\u003cli\u003eLower headsets on bikes with Knock Block do not have any unique features. They are usually IS headsets which are available separately\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Type\u003c\/td\u003e\n\u003ctd\u003eCartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ekeyword search\u003c\/td\u003e\n\u003ctd\u003eTrek Knock Block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpper Stack Height\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eS.H.I.S. Stem Clamp Diameter\u003c\/td\u003e\n\u003ctd\u003e28.6 Threadless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e","brand":"Gio's Outdoors","offers":[{"title":"Default Title","offer_id":54007910105372,"sku":"HEA44727136K","price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/5051\/0364\/files\/610fb8f25d56bb880fbe45ef5dd7544fa80d04b1.jpg?v=1774733440","url":"https:\/\/pearlcitycycle.com\/products\/wolf-tooth-headset-upper-knock-block-28-6-8mm-black","provider":"Pearl City Cycle","version":"1.0","type":"link"}