{"product_id":"profile-design-stem-converter-1-inch-quill-steerer-to-1-1-8-inch-threadless-stem","title":"Profile Design Stem Converter Adapter for 1 Inch Quill to 1-1\/8 Inch Threadless Stem","description":"\u003cp\u003eUpgrade your bike’s steering with the Profile Design Stem Converter, designed to bring modern versatility to older threaded forks. This converter allows you to fit a 1-1\/8 inch threadless stem onto a classic 1 inch quill steerer, expanding your options for handlebar customization and improved ergonomics. Crafted with a durable aluminium body and a steel bolt, it ensures strength without compromising weight, weighing just 160 grams.\u003c\/p\u003e\n\n\u003cp\u003eWith a total length of 135mm, including 42mm for the stem fitting and 93mm for insertion into your head-tube, this converter fits securely while maintaining optimal stability. Ideal for forks with a 25.4mm diameter and a 22.2mm internal diameter, it’s a practical choice for upgrading vintage bikes with modern components.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eConverting 1 inch quill steerer bikes to accept 1-1\/8 inch threadless stems\u003c\/li\u003e\n  \u003cli\u003eExpanding stem compatibility for older bicycles\u003c\/li\u003e\n  \u003cli\u003eProviding a lightweight, durable steering upgrade\u003c\/li\u003e\n  \u003cli\u003eEnhancing handlebar customization options\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBikes with non-standard fork diameters or internal diameters\u003c\/li\u003e\n  \u003cli\u003eUse with forks not matching 1 inch (25.4mm) size and 22.2mm internal diameter\u003c\/li\u003e\n  \u003cli\u003eApplications requiring integrated headset components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWill this converter fit all 1 inch quill stem bikes?\u003c\/strong\u003e\u003cbr\u003eThis converter fits bikes with a 1 inch (25.4mm) fork diameter and 22.2mm internal diameter only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this to upgrade to any threadless stem?\u003c\/strong\u003e\u003cbr\u003eIt is designed specifically for 1-1\/8 inch threadless stems, providing compatibility with most modern stems of that size.\u003c\/p\u003e","brand":"Profile Design","offers":[{"title":"Default Title","offer_id":45478266929327,"sku":"PR8241","price":15.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1335191787-79839100.jpg?v=1768516583","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/profile-design-stem-converter-1-inch-quill-steerer-to-1-1-8-inch-threadless-stem","provider":"Swinnerton Cycles","version":"1.0","type":"link"}