{"product_id":"couronne-decimale-rennen-4-vis-non-filetee","title":"RENNEN 4-Bolt Non-Threaded Decimal Chainring","description":"\u003cp\u003eThe \u003cb\u003eRennen 4-bolt non-threaded decimal chainring\u003c\/b\u003e addresses a well-known issue among BMX Race riders: going from one tooth count to the next changes the rollout by a full step, which is often too much for fine-tuning. Rennen Design Group has therefore developed intermediate tooth counts that allow riders to fine-tune their gearing by half-steps.\u003c\/p\u003e\n\u003cp\u003eThis is the most extensive range in the line-up, with \u003cb\u003eten decimal tooth counts from 41.2 to 50.2\u003c\/b\u003e. It covers two distinct setups: from 41.2 to 44.7 for standard 20-inch gearings, and from 48.8 to 50.2 for Cruiser setups running big gears. A rider who finds 42T too easy and 43T too hard now has intermediate options — a critical adjustment at the start gate, where everything is decided in the first few pedal strokes.\u003c\/p\u003e\n\u003cp\u003eThe construction features Rennen's signature know-how: \u003cb\u003e7075-T6 aluminium\u003c\/b\u003e CNC machined in the USA (rated 83% stronger than 6061), a thickness of \u003cb\u003e3\/16\" (approx. 4.8 mm)\u003c\/b\u003e, a weight of \u003cb\u003e79 g in 38T\u003c\/b\u003e, and a dedicated \u003ci\u003esingle speed\u003c\/i\u003e tooth profile engineered to extend tooth life. Non-threaded bolt holes: ensure you have a suitable chainring bolt and nut set.\u003c\/p\u003e","brand":"RENNEN","offers":[{"title":"41.2","offer_id":57326915453308,"sku":"PBS_RENN074780","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"41.7","offer_id":57326915420540,"sku":"PBS_RENN074779","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"42.2","offer_id":57326915387772,"sku":"PBS_RENN074778","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"42.7","offer_id":57326915355004,"sku":"PBS_RENN074777","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"44.2","offer_id":57326915322236,"sku":"PBS_RENN074776","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"44.7","offer_id":57326915289468,"sku":"PBS_RENN074775","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"48.8","offer_id":57326915256700,"sku":"PBS_RENN074774","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"49.2","offer_id":57326915223932,"sku":"PBS_RENN074773","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"49.8","offer_id":57326915191164,"sku":"PBS_RENN074772","price":65.71,"currency_code":"EUR","in_stock":true},{"title":"50.2","offer_id":57326915158396,"sku":"PBS_RENN074771","price":65.71,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/3444\/9318\/files\/21141_eadfec4e-e4b3-46ed-b26c-049c86df24c5.jpg?v=1787211946","url":"https:\/\/probikeshop.com\/products\/couronne-decimale-rennen-4-vis-non-filetee","provider":"Probikeshop","version":"1.0","type":"link"}