{"product_id":"vis-couronne-rennen-xl-x4-noir","title":"RENNEN XL Chainring Bolts (x4) Black","description":"\u003cp\u003eThe \u003cb\u003eRennen Infinity chainring bolts\u003c\/b\u003e are the result of obsessive work on one of the most mundane BMX components. Rennen Design Group reports 97 CAD iterations, 22 machining programme variants and numerous finite element simulations to produce this bolt, machined in-house in the United States on a multi-axis CNC lathe from \u003cb\u003e7075-T6 aluminium\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp\u003eTwo design choices set it apart. A \u003cb\u003eshoulder located just below the head\u003c\/b\u003e distributes the load instead of concentrating it on the thread, making it, according to the brand, the strongest 7075 chainring bolt on the market. And where the rest of the market uses a 5 mm hex socket, Rennen chose \u003cb\u003e4 mm\u003c\/b\u003e: less material removed, therefore 8.5% greater strength. Rennen is confident enough in this design to offer a \u003cb\u003elifetime breakage warranty\u003c\/b\u003e: a broken bolt is replaced.\u003c\/p\u003e\n\u003cp\u003eThis is the \u003cb\u003eXL version, 9 mm long\u003c\/b\u003e, compared with 6.2 mm for the Regular. It is specifically intended for \u003cb\u003ethick crank spiders\u003c\/b\u003e, such as the Answer Accelerator, where a standard-length bolt does not provide enough engagement. Pack of 4 black bolts for 4-bolt chainrings (104 mm BCD), fitted with 4 and 8 mm Allen keys.\u003c\/p\u003e","brand":"RENNEN","offers":[{"title":"Default Title","offer_id":57326915551612,"sku":"PBS_RENN074792","price":15.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/3444\/9318\/files\/17098.jpg?v=1787213108","url":"https:\/\/probikeshop-irl.com\/products\/rennen-xl-chainring-bolts-x4-black","provider":"Probikeshop","version":"1.0","type":"link"}