{"product_id":"nib-nos-jpr-1-threaded-headset-french-threads-dural-ultralight-68g-jp-routens-designed-bf-belleri-built-silver-rare","title":"NIB\/NOS JPR 1\" Threaded Headset: French Threads - Dural Ultralight 68g - JP Routens Designed \/ BF Belleri Built(?) - Silver - RARE","description":"\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eFrom the workshop of Jo Routens \/ Jean Paul Routens, an exceedingly rare and extra light all-aluminum French headset from the 1970's into early 1980's! It was the prime headset choice of constructeurs for high dollar low gram headsets in this era. It was made by B.F. (Belleri) and designed by JP Routens (or the opposite?).  The 1st gen Mavic 300 headset circa 1980 was heavily influenced by this headset, but went with a traditional two nut design (and weighs ~14g heavier because of it). They came in black with Italian threads (compatible with BSA forks) and in silver with French threads.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eBoth the JPR and the Mavic 300 had aluminum races which played into their low weight. Because of this these headsets aren't practical for bikes who are going to have a ton of miles ridden, as the bearings will wear quickly relative to steel bearings. But for show bikes and Sunday Best bikes this is a wonderful choice. The later Mavic 310 addressed this by adding steel races (and gaining 20g)\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: medium;\"\u003eCondition\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eNew old stock in retail packaging with manual! Never installed, probably never even taken off it's center packaging sleeve. Very clean, slightest shop wear only. Does not include bearings, but uses standard \u003cspan\u003e5\/32\" (3.96mm) loose bearings.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: medium;\"\u003eDetails\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e1\" threaded\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003eFrench threads\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e~68 grams\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003eRaw alloy (silver)\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003eBearings not included\u003c\/span\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"JP Routens (JPR)","offers":[{"title":"Default Title","offer_id":53422687191180,"sku":"14120","price":139.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/5144\/9740\/files\/portland_ecommerce_vintage_bike_parts_sale_1970s_1980s_539__24372.1705202209.1280.1280_9483ae4f-dc11-4d13-8f37-498006ae7f88.jpg?v=1791037779","url":"https:\/\/swooncycles.com\/products\/nib-nos-jpr-1-threaded-headset-french-threads-dural-ultralight-68g-jp-routens-designed-bf-belleri-built-silver-rare","provider":"Swoon Cycles (Bike ReCyclery)","version":"1.0","type":"link"}