{"product_id":"fsa-os-99-csi-stem-6-degree-31-8-clamp","title":"FSA OS-99 CSI Stem 6-Degree 31.8 Clamp","description":"\u003cdiv\u003e\n  \u003cp\u003eThe \u003cstrong\u003eFSA OS-99 CSI Stem 6-Degree 31.8 Clamp\u003c\/strong\u003e is engineered for riders who demand lightweight performance and precision cockpit control. Built with advanced carbon construction and refined aluminum hardware, this high-end road stem reflects FSA’s commitment to combining strength, stiffness, and minimal weight for competitive road and performance-oriented cycling setups.\u003c\/p\u003e\n\n  \u003cp\u003eAt the core of the design is \u003cstrong\u003eCarbon Structural Integration (CSI)\u003c\/strong\u003e, a construction method that integrates carbon fiber with aluminum components to optimize strength while reducing weight. The carbon fiber body provides excellent stiffness for confident steering response, ensuring that rider input translates directly to the front wheel. This precise handling is especially valuable for aggressive road riding, climbing efforts, and high-speed descents where cockpit stability matters most.\u003c\/p\u003e\n\n  \u003cp\u003eThe stem features a \u003cstrong\u003e31.8mm handlebar clamp\u003c\/strong\u003e, the modern standard for road handlebars, offering broad compatibility with today’s performance cockpits. Its \u003cstrong\u003e6-degree angle\u003c\/strong\u003e allows riders to fine-tune their position depending on the orientation, helping dial in the ideal balance between aerodynamics, comfort, and handling.\u003c\/p\u003e\n\n  \u003cp\u003eFSA’s attention to detail extends to the stem’s hardware and clamping system. High-quality bolts and a precision-machined faceplate ensure secure bar retention while distributing clamping pressure evenly across the handlebar. This thoughtful engineering helps protect lightweight carbon handlebars while maintaining a stable and reliable cockpit connection.\u003c\/p\u003e\n\n  \u003cp\u003eWith its blend of advanced materials, refined aesthetics, and race-ready performance, the OS-99 CSI stem is a natural fit for premium road builds where every gram and every detail matter.\u003c\/p\u003e\n\n  \u003ch3\u003eFSA OS-99 CSI Stem 6-Degree 31.8 Clamp Specs at a Glance\u003c\/h3\u003e\n  \u003cul class=\"specs_at_a_glance\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Carbon Structural Integration (CSI) carbon fiber body.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHandlebar Clamp Diameter:\u003c\/strong\u003e 31.8mm.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStem Angle:\u003c\/strong\u003e 6 degrees.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Road and performance cycling cockpits.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDesign Focus:\u003c\/strong\u003e Lightweight stiffness and precise steering response.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e High-quality bolts and precision faceplate for secure clamping.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eDesign Benefits\u003c\/h3\u003e\n  \u003col class=\"design_benifits\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCarbon Structural Integration:\u003c\/strong\u003e Carbon fiber construction provides excellent stiffness while minimizing weight.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecise Handling:\u003c\/strong\u003e A rigid cockpit interface ensures responsive steering and confident bike control.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModern Compatibility:\u003c\/strong\u003e The 31.8mm clamp fits the majority of contemporary road handlebars.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePosition Adjustability:\u003c\/strong\u003e The 6-degree angle allows riders to fine-tune cockpit height and reach.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch3\u003eFinal Take\u003c\/h3\u003e\n  \u003cp\u003eThe \u003cstrong\u003eFSA OS-99 CSI Stem 6-Degree 31.8 Clamp\u003c\/strong\u003e combines lightweight carbon construction with precise engineering to deliver a cockpit component built for serious road cyclists. With its responsive handling characteristics, premium materials, and sleek design, it is an excellent choice for riders building or upgrading a high-performance road bike.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"FSA","offers":[{"title":"100mm","offer_id":44867088482348,"sku":"175-0317BKG","price":215.0,"currency_code":"USD","in_stock":true},{"title":"110mm","offer_id":44867088515116,"sku":"175-0318BKG","price":215.0,"currency_code":"USD","in_stock":true},{"title":"120mm","offer_id":44867088547884,"sku":"175-0319BKG","price":215.0,"currency_code":"USD","in_stock":true},{"title":"130mm","offer_id":44867088580652,"sku":"175-0321BKG","price":215.0,"currency_code":"USD","in_stock":true},{"title":"60mm","offer_id":44867088613420,"sku":"175-0322BKG","price":215.0,"currency_code":"USD","in_stock":true},{"title":"70mm","offer_id":44867088646188,"sku":"175-0323BKG","price":215.0,"currency_code":"USD","in_stock":true},{"title":"80mm","offer_id":44867088678956,"sku":"175-0320BKG","price":215.0,"currency_code":"USD","in_stock":true},{"title":"90mm","offer_id":44867088711724,"sku":"175-0316BKG","price":215.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/fsa-os-99-csi-stem-6-degree-318-clamp-4154246.jpg?v=1771292468","url":"https:\/\/ricycles.com\/products\/fsa-os-99-csi-stem-6-degree-31-8-clamp","provider":"RA Cycles","version":"1.0","type":"link"}