{"product_id":"couronne-decimale-rennen-4-vis-filetee","title":"RENNEN 4-Bolt Threaded Decimal Chainring","description":"\u003cp\u003eThe \u003cb\u003eRennen 4-bolt threaded decimal chainring\u003c\/b\u003e solves a well-known issue for BMX Race riders: changing by one full tooth shifts the gear development by a whole step, which is often too much for fine-tuning your \u003ci\u003erollout\u003c\/i\u003e. Rennen Design Group therefore developed intermediate tooth counts — here \u003cb\u003e42.2 \/ 42.7 \/ 43.2 \/ 43.7 teeth\u003c\/b\u003e — allowing you to fine-tune your gearing in half-steps.\u003c\/p\u003e\n\u003cp\u003eIn practice, a rider who finds a 42-tooth ring too short and a 43-tooth too tall gets two extra gear options in between. Out of the starting gate, where everything is decided in the first few pedal strokes, that fine adjustment really counts.\u003c\/p\u003e\n\u003cp\u003eThe construction features Rennen's signature expertise: \u003cb\u003e7075-T6 aluminium\u003c\/b\u003e CNC-machined in the USA (rated 83% stronger than 6061), \u003cb\u003e3\/16\" thickness (approx. 4.8 mm)\u003c\/b\u003e, and a dedicated \u003ci\u003esingle speed\u003c\/i\u003e tooth profile. The \u003cb\u003eintegrated threads\u003c\/b\u003e eliminate the need for chainring nuts and chainring spanners: the bolt screws directly into the machined threads for a precise, wobble-free fit. 104 mm BCD, compatible with 8 and 9-speed chains.\u003c\/p\u003e","brand":"RENNEN","offers":[{"title":"42.2","offer_id":57326916469116,"sku":"PBS_RENN074770","price":64.99,"currency_code":"EUR","in_stock":false},{"title":"42.7","offer_id":57326916436348,"sku":"PBS_RENN074769","price":64.99,"currency_code":"EUR","in_stock":true},{"title":"43.2","offer_id":57326916403580,"sku":"PBS_RENN074768","price":64.99,"currency_code":"EUR","in_stock":false},{"title":"43.7","offer_id":57326916370812,"sku":"PBS_RENN074767","price":64.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/3444\/9318\/files\/35519.jpg?v=1787210653","url":"https:\/\/probikeshop-irl.com\/products\/rennen-4-bolt-threaded-decimal-chainring","provider":"Probikeshop","version":"1.0","type":"link"}