{"product_id":"corona-fsa-sl-k-powerbox-stealth-50t","title":"FSA SL-K\/Powerbox Stealth chainring - 50T","description":"\u003ch3\u003eFSA SL-K\/Powerbox Stealth Chainring: Performance and Precision for Competitive Cycling\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e50T FSA SL-K\/Powerbox Stealth chainring\u003c\/strong\u003e represents excellence in drivetrain performance for high-performance road and mountain bikes. Made from CNC-machined \u003cstrong\u003eAL7075 T6 aluminum\u003c\/strong\u003e, this \u003cstrong\u003ebicycle chainring\u003c\/strong\u003e delivers structural rigidity and optimal lightweight performance for every riding condition. Full Speed Ahead has developed sophisticated design and testing protocols, selecting the best materials from the United States, Europe, and qualified suppliers in Asia. The \u003cstrong\u003estealth design\u003c\/strong\u003e with a black anodized finish and laser-etched logo combines aesthetics and functionality, making it ideal for those seeking maximum \u003cstrong\u003eclimbing performance\u003c\/strong\u003e and decisive accelerations on demanding cycling routes.\u003c\/p\u003e\n\n\u003ch3\u003eUniversal Compatibility and Advanced Construction Technology\u003c\/h3\u003e\n\n\u003cp\u003eThis \u003cstrong\u003e50-tooth chainring\u003c\/strong\u003e is compatible with \u003cstrong\u003eFSA POWERBOX ABS\u003c\/strong\u003e and SL-K Light ABS cranksets, with BCD 110ABS mount and 4 fixing holes. The \u003cstrong\u003edrivetrain\u003c\/strong\u003e supports Shimano 10\/11-speed, Sram 10\/11-speed, and FSA 11-speed systems, ensuring installation versatility across multiple setups. The \u003cstrong\u003emoving ramps and stainless steel pins\u003c\/strong\u003e on the outer rings optimize shifting, reducing chain slip during gear changes. \u003cstrong\u003eCNC machining\u003c\/strong\u003e technology ensures microscopic tolerances and even load distribution across the teeth, a crucial factor for durability and performance in official races and intensive training.\u003c\/p\u003e\n\n\u003ch3\u003eCertified Reliability in International Competition\u003c\/h3\u003e\n\n\u003cp\u003eFull Speed Ahead chainrings have triumphed in numerous World Championships, Tour de France and Olympic Games, demonstrating the reliability of the design. The \u003cstrong\u003edrivetrain chainring\u003c\/strong\u003e in 50T is positioned as a mid-to-high-end development, ideal for sprinters and riders on rolling courses where balance between acceleration and \u003cstrong\u003epedaling efficiency\u003c\/strong\u003e is essential. Build durability outperforms the competition thanks to rigorous material selection and implemented quality controls. Every crank revolution benefits from the optimized tooth geometry and \u003cstrong\u003epremium aluminum construction\u003c\/strong\u003e, ensuring consistent long-term performance and reliability even in adverse weather conditions.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: CNC-machined AL7075 T6 aluminum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of teeth\u003c\/strong\u003e: 50T for double chainring cranksets.\u003c\/li\u003e\n\u003cli\u003eMoving ramps and \u003cstrong\u003estainless steel\u003c\/strong\u003e pins on outer rings.\u003c\/li\u003e\n\u003cli\u003eBlack anodized finish with laser-etched logo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankset compatibility\u003c\/strong\u003e: FSA POWERBOX ABS, SL-K Light ABS.\u003c\/li\u003e\n\u003cli\u003eGiro Bolts (BCD): 110ABS with 4 fixing holes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChain compatibility\u003c\/strong\u003e: Shimano 10\/11-speed, Sram 10\/11-speed, FSA 11-speed.\u003c\/li\u003e\n\u003cli\u003eReduced weight optimized for cyclocross and road racing.\u003c\/li\u003e\n\u003cli\u003eGeometric precision for smooth shifts and responsive gear changes.\u003c\/li\u003e\n\u003cli\u003eTested in international World, Tour de France and Olympic competitions.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fsa","offers":[{"title":"50 \/ Black","offer_id":54673034215770,"sku":"371-0024006010","price":87.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0532\/7139\/6534\/files\/fsa-powerbox-ring-52-23_hr.jpg?v=1704290306","url":"https:\/\/www.all4cycling.com\/en\/products\/corona-fsa-sl-k-powerbox-stealth-50t","provider":"All4cycling ","version":"1.0","type":"link"}